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Rakesh Agrawal (chemical engineer)

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Rakesh Agrawal
Agrawal in 2011
Alma mater
Known forContributions to separations and gas liquefaction, renewable energy
Scientific career
FieldsChemical engineering
Institutions

Rakesh Agrawal is the Winthrop E. Stone Distinguished Professor of Chemical Engineering at Purdue University in West Lafayette, Indiana.[1] He is a chemical engineer known for contributions to separations, cryogenic gas separation and liquefaction, and for contributions to renewable energy including the conversion of biomass to chemicals and fuels, inorganic solar cell fabrication, and the synergistic use of solar energy.

Early life and education

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Dr. Agrawal received a B.Tech. in chemical engineering from the Indian Institute of Technology in Kanpur, India, in 1975; a M. Ch.E. from the University of Delaware in Dover, Delaware in 1977, and an Sc.D. in chemical engineering from the Massachusetts Institute of Technology (MIT) in Cambridge, Massachusetts in 1980.[2]

Career

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In 1980, Rakesh Agrawal joined Air Products in Trexlertown, Pennsylvania, where he was appointed to Air Products Fellow.[3]

In 2002, Agrawal was elected as a member of the National Academy of Engineering for contributions to the development and worldwide implementation of high-efficiency and high-purity cryogenic and non-cryogenic gas separation processes.

Contributions to separations and gas liquefaction

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While at Air Products, Dr. Agrawal contributed to improvements in the efficiency of natural gas liquefaction, electronic gases manufacturing, cryogenic processing and gas separation. He led the development of the APX process for natural gas liquefaction that more than doubled the production from a single train.[4][5] For semiconductor applications, Agrawal invented Column-Plus and Double Column-Plus[6] ultra high purity (UHP) nitrogen and UHP liquid oxygen processes that reduce product impurities to less than one part per billion.[7][8]

He invented an efficient process to recover refrigeration from liquefied natural gas to produce liquid nitrogen and oxygen.[9][10]

Agrawal introduced several firsts in the arena of separations using distillation. For multicomponent separations, he introduced a new class of satellite column arrangements and a new superstructure that completed the set of basic column configurations available for distillation.[11][12][13] He discovered a solution to the long-standing problem of making highly energy efficient thermally coupled columns operable by making vapor flow between columns unidirectional.[14][15]

Agrawal presented a generalized framework to convert classical two-way thermal coupling to one-way liquid only transfer, thereby eliminating the challenge involved with the intercolumn vapor transfer between the thermally coupled distillation columns.[16][17][18] This enabled the creation of multi-effect distillation analogs of thermally-coupled distillation columns resulting in a further potential for up to 50% reduction in the energy consumption of the already efficient thermally coupled configuration.[19][20]

Contrary to the assumption that fully thermally coupled systems are the most energy efficient among the basic configurations, Agrawal showed that the thermodynamic efficiency of this system can often be worse than the other configurations.[21][15][22] In 2001, for process intensification, he introduced a number of dividing wall column schemes including ones for side rectifier and side stripper configurations.[23][24]

In 2003, Agrawal extended the concept of using dividing wall columns for batch distillation.[25] Later his team introduced a new class of dividing wall columns and a generalized method to draw the corresponding dividing wall column for any given thermally coupled configuration.[26][27][20][28][29] First, he led the development of the Shah and Agrawal method to elucidate all feasible basic n-1 distillation column configurations for the separation of an n-component non-azeotropic mixture with n greater than 3,[30] and then in collaboration with professor Mohit Tawarmalani, developed optimization methods to rank-list these thousands to millions of configurations according to their heat duty, exergy, and cost.[31][32][33][34]

Agrawal has also published methods to draw membrane cascades using a limited number of compressors for high recovery of products at high purity.[35][36]

In analogy to multicomponent distillation configurations, he introduced membrane cascade schemes for multi-component gas separation.[37][38][39] These membrane cascades can also be utilized for liquid separations by replacing compressors with pumps.

Contributions to renewable energy

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Since joining Purdue University in 2004, Agrawal has focused on creating more energy-efficient and low-cost processes for generating renewable energy.[1] He has outlined novel biomass conversion processes in which no biomass carbon is left unconverted to fuel.[40][41] He suggested: (i) use of H2 from a renewable energy source in processes such as H2 CAR, and (ii) an H2Bioil process with biomass hydropyrolysis at a high pressure followed by immediate downstream hydrodeoxygenation to yield high energy density oil in two simple steps.[41][42][43][44]

The H2Bioil process was successfully demonstrated through experiments and several companies have adapted the process and its variations.[45]

Agrawal has proposed methods for the solution-based fabrication of thin-film inorganic solar cells. For the nanoparticle ink-based route, his group achieved the highest inorganic solar cell efficiencies for Cu2Zn(Sn,Ge)Se4 (9.4%) and Cu(In,Ga)Se2 (15%).[46][47][48]

His team was the first to synthesize (1) Cu2ZnSnS4 nanoparticles[49][50] and tailor the bandgap of Cu2ZnSnSe4 through partial substitution of Sn with Ge, and Cu with Ag;[51][52][53][54] and (2) promising Cu3AsS4 and their thin films for solar cells.[55][56]

Agrawal and his team devised an integrated solar thermal power cycle with daytime coproduction of hydrogen and electricity along with H2 storage followed by nighttime combustion of stored H2 using water as a working fluid to supply electricity around the clock with calculated overall sun to electricity efficiencies of 34% to 45%.[57][58] This cycle stores energy with efficiencies similar to batteries but at a much higher storage density.[59][58] To address the intermittency of solar energy, for storage of electricity at GWhr levels, Agrawal devised cycles using hydrocarbons and liquid CO2 as circulating fluids to supply electricity around the clock.[60]

Agrawal's current research is on the use of photovoltaic (PV) modules on agriculture land to cogenerate electricity while producing food, the concept of PV aglectric farming.[61] Unlike current PV modules that block sunlight and damage crops, Agrawal's group has suggested new PV modules that divert solar spectrum photons to plants while using the rest for electricity generation.[62][63]

In collaboration with a team of experts from the Colleges of Agriculture and Engineering at Purdue University, he is leading an experimental and modelling study at the Purdue University's farm to demonstrate the concept of PV aglectric farming for major crops such as corn and soybean.[64]

Awards and honors

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Agrawal is the recipient of numerous awards. He received the National Medal of Technology & Innovation in 2011 from U.S. President Barack Obama, "[f]or an extraordinary record of innovations in improving the energy efficiency and reducing the cost of gas liquefaction and separation. These innovations have had significant positive impacts on electronic device manufacturing, liquefied gas production, and the supply of industrial gases for diverse industries.”[65] Agrawal has received several distinctions from the American Institute of Chemical Engineers including the Alpha Chi Sigma Award for Chemical Engineering Research (2017);[66] the Founders Award for Outstanding Contributions to the Field of Chemical Engineering (2011);[67] the Fuels and Petrochemicals Division Award (2008); Institute Lecturer (2005);[68] the Chemical Engineering Practice Award (2006);[69] the Clarence G. Gerhold Award, Separations Division (2001);[70] and the Institute Award for Excellence in Industrial Gases Technology (1998).[71] The American Chemical Society has honored Agrawal with the Award in Separations Science and Technology (2017).[72]

Agrawal was the youngest ever recipient of Air Products and Chemicals’ most prestigious Chairman's Award (1992).[73] Other awards he received from Air Products and Chemicals include the Extraordinary Quality Award (1992); the Diamond Award (2001);[74] and the Equipment Innovation Award (2003). In addition, Agrawal received the Industrial Research Institute Innovation Research Achievement Award (2007).[75] Agrawal's international distinctions include the Distinguished Alumnus Award, Indian Institute of Technology, Kanpur (2012), the inaugural Excellence in Gas Processing Award from the Annual Gas Processing Symposium, Qatar (2009), and the J&E Hall Gold Medal, Institute of Refrigeration, UK (2004).

Agrawal is a member of the U.S. National Academy of Engineering (2002);[76] Fellow of the American Academy of Arts and Sciences (2013);[77] Foreign Fellow of the Indian National Academy of Engineering (2011); Fellow of the U.S. National Academy of Inventors (2014);[78] Fellow of the American Institute of Chemical Engineers (AIChE) (2009); Faculty Fellow of the Hagler Institute for Advanced Study, Texas A&M University (2014);[79] Distinguished Member of the National Society of Collegiate Scholars (2014);[80] Member of Sigma Xi (2017), and Honorary Fellow of the Indian Institute of Chemical Engineers (2001).  

Agrawal has received numerous awards from Purdue University including the Philip C. Wankat Graduate Teaching Award in Chemical Engineering (2019);[81] the Shreve Award for Excellence in Undergraduate Teaching (2013); and the Morrill Award (2014),[82] which is the highest award Purdue University confers upon a faculty member for excellence in all three dimensions of teaching, research and engagement.[83] Agrawal was also inducted into Purdue's Innovator Hall of Fame (2015).[84]

Agrawal has delivered numerous named lectures at universities including the Regents’ Lecturer, University of California, Los Angeles (2004); the Texas Institute of Advanced Studies, now Hagler Institute for Advanced Studies, Eminent Scholar Lecturer, Texas A&M University (2015);[79] Berkeley Lectures, University of California, Berkeley (2015);[85] the Distinguished Lecture of the Missouri Science & Technology Academy of Chemical Engineers, Rolla, MO, (2019);[86] the Professor B. D. Tilak Visiting Fellowship Lecture, Institute of Chemical Technology, University of Mumbai, India (2004); the Prof. C.V. Seshadri Memorial Distinguished Lecture, IIT Bombay, Mumbai, India, (2014); the Annual KAIST CBE Global Distinguished Lecturer, Korea, (2013). Agrawal was the Allan P. Colburn Honorary Lecturer at E. I. du Pont de Nemours and Company (2013).

Agrawal has delivered numerous named lectures at conferences including the Peter V. Danckwerts Lecture at the 10th World Congress of Chemical Engineering, Barcelona, Spain (2017)[87] and the C. K. Murthy Memorial Lecture, Indian Institute of Chemical Engineers (2008).[88] Honorary Professorships held by Agrawal include the V.V. Mariwala Visiting Professorship, UICT, Mumbai, India (2007); the ExxonMobil Visiting Chair Professor, Department of Chemical and Biomolecular Engineering, National University of Singapore, (2011-2014); and the Dr. Balwant S. Joshi Distinguished Visiting Professorship, Institute of Chemical Technology, Mumbai, India (2019-2020).

Agrawal is married to Manju Agrawal and they have two sons, Udit and Numit.

Professional Service

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Agrawal has been a member of the technology boards of Air Products and Chemicals (2004-2007), Dow Chemical (2007-2014),[89] Kyrogen Ltd. (200-2010),[89] Weyerhaeuser (2008-2009), ATMI (2010-2012), and the Engineering Advisory Board of Genomatica (2009-2013). He was also a member of Aspen Tech Academy, Aspen Tech (2012-2017).[90] He has been an Advisory Council member of the Chemical and Biochemical Engineering Department of Cornell University (2002-2007), the Department of Chemical and Biomolecular Engineering of the University of Delaware (2012–present),[91] the Department of Chemical and Biomolecular Engineering of Lehigh University (2016-2020), and Chemical Engineering Department of Worcester Polytechnic Institute, Worcester, MA (2007-2012).[92] He was a Member of the Bourns College of Engineering Council of Advisors, University of California, Riverside (2003-2005).[93] He is a member of the Wanger Institute for Sustainable Energy Research (WISER) Board of Advisors, Illinois Institute of Technology Chicago (2009–present ).[94] He is currently a member of the Technical Review Panel for the Materials, Chemicals, & Computational Science, National Renewable Energy Lab (NREL), Golden, CO, (2019–present).

Agrawal has served on various committees of the U.S. National Academy of Engineering (NAE) including the Peer Committee of the Chemical Engineering Section (2004-2007), and Committee on Membership (CoM) (2017-2020). He served as Vice Chair (2011) and then as Chair (2012) of the Chemical Engineering Section of the NAE. He was a participant in the NAE workshop on ‘Educate to Innovate’, Washington DC, October 2013.[95] He is currently a member of the NAE Energy Working Group (EWG). He served on the National Research Council (NRC) Board on Energy and Environmental Sciences (BEES) (2005–11).[96] He participated on the Committee on Alternatives and Strategies for Future Hydrogen Production and Use (2002-2004) that produced a study report on The Hydrogen Economy, Opportunities, Barriers, and R&D Needs.[97] He also participated in the NRC Committee on Assessment of Resource Needs for Fuel Cell and Hydrogen Technologies (2006-2008)[98] which resulted in the publication of Transitions to Alternative Transportation Technologies – A Focus on Hydrogen.[99] He has served on various NRC panels including National Academies’ Renewables Panel for the Committee on America's Energy Future (2007-2008).[100]-[101]

Agrawal has been a volunteer in many American Institute of Chemical Engineers (AIChE) activities. He served on its Board of Directors (2006-2008);[102] and as a member of the Chemical Engineering Technology Operating Council (CTOC) (1999-2007) and as its Chair in 2002. He has served on several AIChE committees that include: the Awards Committee (1999-2003), Publications Quality Team (1995-1996), AIChE Energy Commission (2005-2007), Search Committee for AIChE Journal’s Chief-Editor (2000), AIChE Board’s Strategy Planning Meeting (2004), AIChE Fellow Review Committee (2006-2008), AIChE Board Award Committee (2008), AIChE International Committee (2008-2009), and Board of Trustees AIChE Foundation (2011). He has been an active member of the AIChE Separations Division and was its chair in 1994. As a chair, he was responsible for the AIChE’s 2nd Topical Conference on Separations (1995).

Agrawal has served on the editorial boards of prominent chemical engineering journals: Consulting Editor, Separations, AIChE Journal (1999-2008);[103] Editorial Advisory Board, Industrial & Engineering Chemistry Research (2010-2012);[104] Editorial Board, Current Opinion in Chemical Engineering (2011- 2021);[105] Editorial Advisory Board, Chemical Engineering Progress (2012-2020);[106] Consulting Editors Board, AIChE Journal (2012–present);[107] Editorial Board, Chemie Ingenieur Technik - Chemical Engineering and Technology – Energy Technology (2012-2023);[108] and Editorial Board member, Journal of Advanced Manufacturing and Processing (2018–present).[109]

He has served on the Programming Committees of several national and international conferences. They include the series of Foundations of Computer-Aided Process Design (FOCAPD),[110] Process Systems Engineering (PSE),[111] and Distillation & Absorption conferences.

Agrawal was a trustee of the Computer-aided Chemical Engineering (CACHE) corporation (1997-2005).[112] He was a U.S. Member of Commission A3 (1996-1999), and Commission A2 (2000-2007) of the International Institute of Refrigeration (IIR). He was also Vice President of Commission A2 from 2003 to 2007. His service to National Science Foundation (NSF) includes serving on the Panel on Process Design and Control (2005), the workshop on Separations (2004),[113] and the international benchmarking study on Systems Engineering for Renewable and Clean Energy Manufacturing (SEEM), (2012). He is a guest member of the European Federation of Chemical Engineering (EFCE) Working Party on Fluid Separations (2010–present).[114]

Agrawal served as a Panel Member that studied the Role of Indian Diaspora in Capacity Building for Affordable Solar Power and made a presentation on solar strategy to Indian Prime Minister Narendra Modi, External Affairs Minister Sushma Swaraj, and Energy Minister R. K. Singh in August 2018. He participated in the discussion of the Role of Indian Diaspora in Capacity Building for Affordable Solar Power at the 15th Pravasi Bharatiya Divas (PBD) Convention, Varanasi, India, January 2019.[115]  He was a panelist on Sustainable Fuels as well as Advanced Materials sessions at Vaishvik Bhartiya Vaigyanik (VAIBHAV) Summit, in October 2020. He is a member of the Advisory Board of the Department of Sustainable Engineering, IIT Kanpur, India (2021–present).

References

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  1. ^ a b "Rakesh Agrawal Research Group – Purdue University – Davidson School of Chemical Engineering". Retrieved 1 December 2020.
  2. ^ "Rakesh Agrawal". www.aiche.org. 29 February 2012. Retrieved 1 December 2020.
  3. ^ "UD alumnus, Rakesh Agrawal, among nation's top scientists and innovators". Chemical & Biomolecular Engineering at University of Delaware. 7 October 2011. Retrieved 1 December 2020.
  4. ^ US 6308531, Roberts, Mark Julian & Agrawal, Rakesh, "Hybrid cycle for the production of liquefied natural gas", published 2001-10-30, assigned to Air Products 
  5. ^ "Dr. Agrawal: His life, his work". National Science and Technology Medals Foundation. 20 December 2016. Retrieved 2 December 2020.
  6. ^ US 5697229, Agrawal, Rakesh & Fidkowski, Zbigniew T., "Process to produce nitrogen using a double column plus an auxiliary low pressure separation zone", published 1997-12-16, assigned to Air Products 
  7. ^ US 5049173, Cormier, Sr., Thomas E.; Agrawal, Rakesh & Prentice, Alan L. et al., "Production of ultra-high purity oxygen from cryogenic air separation plants", published 1991-09-17, assigned to Air Products & Chemicals, Inc. 
  8. ^ Agrawal, Rakesh; Thorogood, Robert M. (1 December 1991). "Production of medium pressure nitrogen by cryogenic air separation". Gas Separation & Purification. 5 (4): 203–209. doi:10.1016/0950-4214(91)80025-Z. ISSN 0950-4214.
  9. ^ US 5141543, Agrawal, Rakesh & Cormier, Sr., Thomas E., "Use of liquefied natural gas (LNG) coupled with a cold expander to produce liquid nitrogen", published 1992-08-25, assigned to Air Products 
  10. ^ US 5139547, Agrawal, Rakesh & Ayres, Calvin L., "Production of liquid nitrogen using liquefied natural gas as sole refrigerant", published 1992-08-18, assigned to Air Products 
  11. ^ Agrawal, Rakesh (1 January 1996). "Synthesis of Distillation Column Configurations for a Multicomponent Separation". Industrial & Engineering Chemistry Research. 35 (4): 1059–1071. doi:10.1021/ie950323h. ISSN 0888-5885.
  12. ^ Christiansen, Atle C.; Skogestad, Sigurd; Lien, Kristian (20 May 1997). "Complex distillation arrangements: Extending the petlyuk ideas". Computers & Chemical Engineering. Supplement to Computers and Chemical Engineering. 21: S237–S242. doi:10.1016/S0098-1354(97)87508-4. ISSN 0098-1354.
  13. ^ Doherty, M.F. and M. F. Malone (2001). Conceptual Design of Distillation Systems. McGraw-Hill. p. 318. ISBN 0072488638.
  14. ^ Agrawal, Rakesh; Fidkowski, Zbigniew T. (1998). "More operable arrangements of fully thermally coupled distillation columns". AIChE Journal. 44 (11): 2565–2568. Bibcode:1998AIChE..44.2565A. doi:10.1002/aic.690441124. ISSN 1547-5905.
  15. ^ a b M. F. Doherty and M. F. Malone (2001). Conceptual Design of Distillation Systems. McGraw-Hill. p. 310. ISBN 0072488638.
  16. ^ Agrawal, Rakesh (2000). "Thermally coupled distillation with reduced number of intercolumn vapor transfers". AIChE Journal. 46 (11): 2198–2210. Bibcode:2000AIChE..46.2198A. doi:10.1002/aic.690461112. ISSN 1547-5905.
  17. ^ US 6286335, Agrawal, Rakesh, "Processes for multicomponent separation", published 2001-09-11, assigned to Air Products 
  18. ^ Cui, Chengtian; Zhang, Xiaodong; Sun, Jinsheng (1 May 2019). "Design and optimization of energy-efficient liquid-only side-stream distillation configurations using a stochastic algorithm". Chemical Engineering Research and Design. 145: 48–52. Bibcode:2019CERD..145...48C. doi:10.1016/j.cherd.2019.03.001. ISSN 0263-8762. S2CID 108168580.
  19. ^ Agrawal, Rakesh (2000). "Multieffect distillation for thermally coupled configurations". AIChE Journal. 46 (11): 2211–2224. Bibcode:2000AIChE..46.2211A. doi:10.1002/aic.690461113. ISSN 1547-5905.
  20. ^ a b Waltermann, Thomas; Sibbing, Steffen; Skiborowski, Mirko (1 December 2019). "Optimization-based design of dividing wall columns with extended and multiple dividing walls for three- and four-product separations". Chemical Engineering and Processing - Process Intensification. 146: 107688. Bibcode:2019CEPPI.14607688W. doi:10.1016/j.cep.2019.107688. ISSN 0255-2701. S2CID 208694035.
  21. ^ Agrawal, Rakesh; Fidkowski, Zbigniew T. (1 August 1998). "Are Thermally Coupled Distillation Columns Always Thermodynamically More Efficient for Ternary Distillations?". Industrial & Engineering Chemistry Research. 37 (8): 3444–3454. doi:10.1021/ie980062m. ISSN 0888-5885.
  22. ^ Flores, Olga A.; Cárdenas, J. Carlos; Hernández, Salvador; Rico-Ramírez, Vicente (1 November 2003). "Thermodynamic Analysis of Thermally Coupled Distillation Sequences". Industrial & Engineering Chemistry Research. 42 (23): 5940–5945. doi:10.1021/ie034011n. ISSN 0888-5885.
  23. ^ Agrawal, Rakesh (1 October 2001). "Multicomponent Distillation Columns with Partitions and Multiple Reboilers and Condensers". Industrial & Engineering Chemistry Research. 40 (20): 4258–4266. doi:10.1021/ie000315n. ISSN 0888-5885.
  24. ^ Waltermann, Thomas; Skiborowski, Mirko (2017). "Conceptual Design of Highly Integrated Processes – Optimization of Dividing Wall Columns". Chemie Ingenieur Technik. 89 (5): 562–581. doi:10.1002/cite.201600128. ISSN 1522-2640.
  25. ^ US 6550274, Agrawal, Rakesh, "Batch distillation", published 2003-04-22, assigned to Air Products 
  26. ^ Ramapriya, Gautham Madenoor; Tawarmalani, Mohit; Agrawal, Rakesh (2014). "Thermal coupling links to liquid-only transfer streams: A path for new dividing wall columns". AIChE Journal. 60 (8): 2949–2961. Bibcode:2014AIChE..60.2949M. doi:10.1002/aic.14468. ISSN 1547-5905.
  27. ^ US 9504934, Agrawal, Rakesh & Ramapriya, Gautham Madenoor, "Multicomponent dividing wall columns", published 2016-11-29, assigned to Purdue Research Foundation 
  28. ^ Ramapriya, Gautham Madenoor; Tawarmalani, Mohit; Agrawal, Rakesh (2018). "A systematic method to synthesize all dividing wall columns for n-component separation—Part I". AIChE Journal. 64 (2): 649–659. Bibcode:2018AIChE..64..649M. doi:10.1002/aic.15964. ISSN 1547-5905.
  29. ^ Ramapriya, Gautham Madenoor; Tawarmalani, Mohit; Agrawal, Rakesh (2018). "A systematic method to synthesize all dividing wall columns for n-component separation: Part II". AIChE Journal. 64 (2): 660–672. Bibcode:2018AIChE..64..660M. doi:10.1002/aic.15963. ISSN 1547-5905.
  30. ^ Shah, Vishesh H.; Agrawal, Rakesh (2010). "A matrix method for multicomponent distillation sequences". AIChE Journal. 56 (7): 1759–1775. Bibcode:2010AIChE..56.1759S. doi:10.1002/aic.12118. ISSN 1547-5905.
  31. ^ Nallasivam, Ulaganathan; Shah, Vishesh H.; Shenvi, Anirudh A.; Huff, Joshua; Tawarmalani, Mohit; Agrawal, Rakesh (2016). "Global optimization of multicomponent distillation configurations: 2. Enumeration based global minimization algorithm". AIChE Journal. 62 (6): 2071–2086. Bibcode:2016AIChE..62.2071N. doi:10.1002/aic.15204. ISSN 1547-5905. OSTI 1238668.
  32. ^ Gooty, Radhakrishna Tumbalam; Mobed, Parham; Tawarmalani, Mohit; Agrawal, Rakesh (1 January 2018), Eden, Mario R.; Ierapetritou, Marianthi G.; Towler, Gavin P. (eds.), "Optimal Multicomponent Distillation Column Sequencing: Software and Case Studies", Computer Aided Chemical Engineering, 13 International Symposium on Process Systems Engineering (PSE 2018), vol. 44, Elsevier, pp. 223–228, doi:10.1016/B978-0-444-64241-7.50032-X, ISBN 9780444642417, retrieved 1 December 2020
  33. ^ Jiang, Zheyu; Mathew, Tony Joseph; Zhang, Haibo; Huff, Joshua; Nallasivam, Ulaganathan; Tawarmalani, Mohit; Agrawal, Rakesh (12 July 2019). "Global optimization of multicomponent distillation configurations: Global minimization of total cost for multicomponent mixture separations". Computers & Chemical Engineering. 126: 249–262. doi:10.1016/j.compchemeng.2019.04.009. ISSN 0098-1354. OSTI 1511698. S2CID 146095226.
  34. ^ Jiang, Zheyu; Chen, Zewei; Huff, Joshua; Shenvi, Anirudh A.; Tawarmalani, Mohit; Agrawal, Rakesh (2019). "Global minimization of total exergy loss of multicomponent distillation configurations". AIChE Journal. 65 (11): e16737. Bibcode:2019AIChE..65E6737J. doi:10.1002/aic.16737. ISSN 1547-5905.
  35. ^ Agrawal, Rakesh (1 March 1997). "A simplified method for the synthesis of gas separation membrane cascades with limited numbers of compressors". Chemical Engineering Science. 52 (6): 1029–1044. Bibcode:1997ChEnS..52.1029A. doi:10.1016/S0009-2509(96)00376-4. ISSN 0009-2509.
  36. ^ Gassner, Martin; Maréchal, François (9 December 2010). "Combined mass and energy integration in process design at the example of membrane-based gas separation systems". Computers & Chemical Engineering. 10th International Symposium on Process Systems Engineering, Salvador, Bahia, Brasil, 16–20 August 2009. 34 (12): 2033–2042. doi:10.1016/j.compchemeng.2010.06.019. ISSN 0098-1354.
  37. ^ Agrawal, Rakesh (1 January 1996). "Membrane Cascade Schemes for Multicomponent Gas Separation". Industrial & Engineering Chemistry Research. 35 (10): 3607–3617. doi:10.1021/ie960160c. ISSN 0888-5885.
  38. ^ Ana Maria Freitas da Silva, "A simple closed-loop membrane process for the purification of active pharmaceutical ingredients." Dissertação para obtenção do Grau de Mestre em Engenharia Química e Bioquímica, page 24, November 2012.
  39. ^ D. Bocciardo, “Optimisation and integration of membrane processes in coal-fired power plants with carbon capture and storage”, PhD Thesis, The University of Edinburgh, pages 24 and 29, May 2015
  40. ^ "New versatile process efficiently converts biomass to liquid fuel | Biomassmagazine.com". biomassmagazine.com. Retrieved 1 December 2020.
  41. ^ a b Agrawal, Rakesh; Singh, Navneet R.; Ribeiro, Fabio H.; Delgass, W. Nicholas (20 March 2007). "Sustainable fuel for the transportation sector". Proceedings of the National Academy of Sciences. 104 (12): 4828–4833. Bibcode:2007PNAS..104.4828A. doi:10.1073/pnas.0609921104. ISSN 0027-8424. PMC 1821126. PMID 17360377.
  42. ^ US 8217211, Agrawal, Rakesh; Agrawal, Manju & Singh, Navneet R., "Process for producing liquid hydrocarbon by pyrolysis of biomass in presence of hydrogen from a carbon-free energy source", published 2012-07-10, assigned to Purdue Research Foundation 
  43. ^ US 8217210, Agrawal, Rakesh & Singh, Navneet R., "Integrated gasification—pyrolysis process", published 2012-07-10, assigned to Purdue Research Foundation 
  44. ^ Singh, Navneet R.; Delgass, W. Nicholas; Ribeiro, Fabio H.; Agrawal, Rakesh (1 July 2010). "Estimation of Liquid Fuel Yields from Biomass". Environmental Science & Technology. 44 (13): 5298–5305. Bibcode:2010EnST...44.5298S. doi:10.1021/es100316z. ISSN 0013-936X. PMID 20527758.
  45. ^ Venkatakrishnan, Vinod Kumar; Delgass, W. Nicholas; Ribeiro, Fabio H.; Agrawal, Rakesh (22 December 2014). "Oxygen removal from intact biomass to produce liquid fuel range hydrocarbons via fast-hydropyrolysis and vapor-phase catalytic hydrodeoxygenation". Green Chemistry. 17 (1): 178–183. doi:10.1039/C4GC01746C. ISSN 1463-9270.
  46. ^ Miskin, Caleb K.; Yang, Wei-Chang; Hages, Charles J.; Carter, Nathaniel J.; Joglekar, Chinmay S.; Stach, Eric A.; Agrawal, Rakesh (2015). "9.0% efficient Cu2ZnSn(S,Se)4 solar cells from selenized nanoparticle inks". Progress in Photovoltaics: Research and Applications. 23 (5): 654–659. doi:10.1002/pip.2472. ISSN 1099-159X. S2CID 97988714.
  47. ^ McLeod, Steven M.; Hages, Charles J.; Carter, Nathaniel J.; Agrawal, Rakesh (2015). "Synthesis and characterization of 15% efficient CIGSSe solar cells from nanoparticle inks". Progress in Photovoltaics: Research and Applications. 23 (11): 1550–1556. doi:10.1002/pip.2588. ISSN 1099-159X. S2CID 93089222.
  48. ^ Hages, Charles J.; Koeper, Mark J.; Miskin, Caleb K.; Brew, Kevin W.; Agrawal, Rakesh (8 November 2016). "Controlled Grain Growth for High Performance Nanoparticle-Based Kesterite Solar Cells". Chemistry of Materials. 28 (21): 7703–7714. doi:10.1021/acs.chemmater.6b02733. ISSN 0897-4756.
  49. ^ Guo, Qijie; Hillhouse, Hugh W.; Agrawal, Rakesh (26 August 2009). "Synthesis of Cu2ZnSnS4 nanocrystal ink and its use for solar cells". Journal of the American Chemical Society. 131 (33): 11672–11673. doi:10.1021/ja904981r. ISSN 1520-5126. PMID 19722591.
  50. ^ Guo, Qijie; Ford, Grayson M.; Yang, Wei-Chang; Walker, Bryce C.; Stach, Eric A.; Hillhouse, Hugh W.; Agrawal, Rakesh (15 December 2010). "Fabrication of 7.2% Efficient CZTSSe Solar Cells Using CZTS Nanocrystals". Journal of the American Chemical Society. 132 (49): 17384–17386. doi:10.1021/ja108427b. ISSN 0002-7863. PMID 21090644.
  51. ^ Guo, Qijie; Ford, Grayson M.; Yang, Wei-Chang; Hages, Charles J.; Hillhouse, Hugh W.; Agrawal, Rakesh (1 October 2012). "Enhancing the performance of CZTSSe solar cells with Ge alloying". Solar Energy Materials and Solar Cells. 105: 132–136. Bibcode:2012SEMSC.105..132G. doi:10.1016/j.solmat.2012.05.039. ISSN 0927-0248.
  52. ^ Hages, Charles J.; Carter, Nathaniel J.; Agrawal, Rakesh; Unold, Thomas (17 June 2014). "Generalized current-voltage analysis and efficiency limitations in non-ideal solar cells: Case of Cu2ZnSn(SxSe1−x)4 and Cu2Zn(SnyGe1−y)(SxSe1−x)4". Journal of Applied Physics. 115 (23): 234504. Bibcode:2014JAP...115w4504H. doi:10.1063/1.4882119. ISSN 0021-8979.
  53. ^ Hages, Charles J.; Levcenco, Sergej; Miskin, Caleb K.; Alsmeier, Jan H.; Abou-Ras, Daniel; Wilks, Regan G.; Bär, Marcus; Unold, Thomas; Agrawal, Rakesh (2015). "Improved performance of Ge-alloyed CZTGeSSe thin-film solar cells through control of elemental losses". Progress in Photovoltaics: Research and Applications. 23 (3): 376–384. doi:10.1002/pip.2442. ISSN 1099-159X. S2CID 96849206.
  54. ^ Hages, Charles J.; Koeper, Mark J.; Agrawal, Rakesh (1 February 2016). "Optoelectronic and material properties of nanocrystal-based CZTSe absorbers with Ag-alloying". Solar Energy Materials and Solar Cells. 145: 342–348. Bibcode:2016SEMSC.145..342H. doi:10.1016/j.solmat.2015.10.039. ISSN 0927-0248.
  55. ^ Balow, Robert B.; Sheets, Erik J.; Abu-Omar, Mahdi M.; Agrawal, Rakesh (14 April 2015). "Synthesis and Characterization of Copper Arsenic Sulfide Nanocrystals from Earth Abundant Elements for Solar Energy Conversion". Chemistry of Materials. 27 (7): 2290–2293. doi:10.1021/acs.chemmater.5b00701. ISSN 0897-4756.
  56. ^ Balow, Robert B.; Miskin, Caleb K.; Abu-Omar, Mahdi M.; Agrawal, Rakesh (24 January 2017). "Synthesis and Characterization of Cu3(Sb1–xAsx)S4 Semiconducting Nanocrystal Alloys with Tunable Properties for Optoelectronic Device Applications". Chemistry of Materials. 29 (2): 573–578. doi:10.1021/acs.chemmater.6b03850. ISSN 0897-4756.
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  58. ^ a b Gençer, Emre; Mallapragada, Dharik S.; Maréchal, François; Tawarmalani, Mohit; Agrawal, Rakesh (29 December 2015). "Round-the-clock power supply and a sustainable economy via synergistic integration of solar thermal power and hydrogen processes". Proceedings of the National Academy of Sciences. 112 (52): 15821–15826. Bibcode:2015PNAS..11215821G. doi:10.1073/pnas.1513488112. ISSN 0027-8424. PMC 4703016. PMID 26668380.
  59. ^ "Could 'hydricity' be the next big energy breakthrough?". edie.net. Retrieved 1 December 2020.
  60. ^ Al-musleh, Easa I.; Mallapragada, Dharik S.; Agrawal, Rakesh (1 June 2014). "Continuous power supply from a baseload renewable power plant". Applied Energy. 122: 83–93. Bibcode:2014ApEn..122...83A. doi:10.1016/j.apenergy.2014.02.015. ISSN 0306-2619.
  61. ^ Miskin, Caleb K.; Li, Yiru; Perna, Allison; Ellis, Ryan G.; Grubbs, Elizabeth K.; Bermel, Peter; Agrawal, Rakesh (2019). "Sustainable co-production of food and solar power to relax land-use constraints". Nature Sustainability. 2 (10): 972–980. Bibcode:2019NatSu...2..972M. doi:10.1038/s41893-019-0388-x. ISSN 2398-9629. S2CID 203986921.
  62. ^ Gençer, Emre; Miskin, Caleb; Sun, Xingshu; Khan, M. Ryyan; Bermel, Peter; Alam, M. Ashraf; Agrawal, Rakesh (9 June 2017). "Directing solar photons to sustainably meet food, energy, and water needs". Scientific Reports. 7 (1): 3133. Bibcode:2017NatSR...7.3133G. doi:10.1038/s41598-017-03437-x. ISSN 2045-2322. PMC 5466672. PMID 28600525.
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