PSRI Consulting

PSRI has over 160 years of experience and over 225 reviewed publications in fluidization and particle technology

Dr. Ye-Mon Chen has over 38 years of combined academia and industry career, including extensive experience in FCC technology and licensing business at Shell. He is the recipient of the AIChE Dow Fluidization Process Recognition and the AIChE PSRI Lectureship Awards, among other recognitions.  He was recognized as one of the top inventors in the history of Shell Houston Technology Center.  He was the technology manager and licensing manager for a new biofuel process.



Tech. manager & License Tech. Manager, Shell  2011-2020

  • Led the team from inception of a new bio-fuel technology to completion in 2.5 year.
  • Leading, as License manager, for deploying new bio-fuel technology with 3 partners.
  • Led the design of complex, multiphase reactor systems for new chemical/bio processes.

 FCC Tech. Manager and Licensing Tech. Manager, Shell   2002 - 2011     

  • Managed FCC technology for 9 Shell FCC units in US, Canada and South America.
  • Built a successful licensing business for Shell FCC tech. from ground zero up
  • Managed 10 successful major projects of FCC revamps for Shell and 7 licensees.
  • Led a JV team to solve a FCC cyclone failure problem, which plagued the industry.

R&D Engineer/Team Leader, Shell  1989 - 2002     

  • Led a R&D team, developed and implemented Shell’s new FCC technologies, e.g., high performance feed nozzle, catalyst circulation improvement, & stripper cyclones.
  • Led a JV team to implement MTBE Fluid Bed reactor system revamp, turned a failing process unit to a success, recognized by the Innovation for Applied Catalysis Award.
  • Led successful reactor system designs for Shell’s new BAP4 and PDO processes
  • Recognition as top 15 all-time inventors in history of Shell Center  Houston.


  • Ph. D. of Chemical Engineering
    • University of Houston   1983
  • M.  S. of Chemical Engineering
    • National Taiwan University   1979
  • B.   S. of Chemical Engineering
    • National Taiwan University   1976 


  • American Inst. of Chem. Eng. Fluidization Progress Recognition Award (2007)
  • American Inst. of Chem. Eng. Fluidization Lectureship Award (2004)
  • of Chem. Eng., UK, Innovation for Applied Catalysis Award (2003).
  • Gold Medal Best Engineer Thesis Award, Inst. of Taiwan Engs, (1980), the first time ever that a Master thesis was selected as the winner from all engineer MS/PhD theses.               
  • Keynote speaker in 10th Conf. of Circulation Fluid Bed in USA (2011)
  • Keynote speaker in Particulate Solids Research Inst. annual meeting (2007)
  • Keynote speaker in 8th Conf. of Circulation Fluid Bed in China (2005)
  • Keynote speaker in Area 3B, in 2004 AIChE Annual Meeting
  • FCC Speaker in America Fuel & Petrochem. Manuf. (AFPM) meetings (2002-2010)
  • Author of Fluid Cat. Cracking (FCC) in Handbook of Fluidization (2003)
  • Chair of AIChE Group 3B, Fluidization and Fluid-Particle Systems, 1998-1999
  • Editor of 1997/1998/1999 AIChE Fluidization and Fluid-Particle Symposium series


Selected Journal Publications

  • Chen, “Recent Advances in FCC Technology”, Powder Tech., 163 (2006) 2-8.
  • Chen, “FCC Technology, Recent Advances and new challenges”, Business Refining: Oil & Gas Process Review, 19-22 (2006)
  • Chen, “Fluid Catalytic Cracking”, Book chapter in Handbook for fluidization and fluid-particle systems, Ed. By Wen-Ching Yang, 2003.
  • Arastoopour, Y. Chen, D. Gidaspow, L. Glicksman, D. King and W-C Yang, Editors, “Advanced technologies for fluid-particle sytems”, AIChE Symp. Series, No 321 (1999).
  • Arastoopour, J. C. Chen, Y. Chen, L. Glicksman, D. King and W-C Yang, Editors, “Fluidization and fluid particle systems – recent research and development”, AIChE Symp. Series, No 318 (1998).
  • Arastoopour, J. C. Chen, Y. Chen, D. King and W-C Yang, Editors, “Advances in fluidization and fluid particle systems”, AIChE Symp. Series, No 317 (1997).
  • Chen, C.-S. Jang, P. Cai and L.S. Fan, ” On the formation and disintegration of particle clusters in a liquid-solid trsport bed”, Chem. Eng. Sci., 46, 2253 (1991)
  • K. Ho, Y. Chen, C.I. Lin and J.R. Jeng, “Flow of granular material in the blast furnance”, Powder Tech., 63, 13 (1990)
  • Chen and L. S. Fan, “Drift flux in gas-liquid-solid fluidized systems from the dynamics of bed collapse”, Chem. Eng. Sci. 45, 935 (1990)
  • Chen and L. S. Fan, “Bubble breakage due to particle collision in a liquid medium: particle wettability effect”, Chem. Eng. Sci., 44, 2762 (1989)
  • Chen and L. S. Fan, “Bubble breakage due to particle collision in a liquid medium”, Chem. Eng. Sci., 44, 117 (1989)
  • Chen, F. Bavarian, L.S. Fan, R.D. Buttke and W.I. Beaton, “Transients in bed expansion of a three-phase fluidized bed”, AIChE Sump. Series, No. 270, 85, 49 (1989)
  • Magiliotou, Y. Chen and L.S. Fan, “Bed-immersed object heat transfer in a trhee-phase fluidized bed” AIChE. J., 34 1043 (1988)
  • Chen and L. S. Fan, “Vertical slug flows of gas-solid transport in circulating fluidized bed”, Circulating Fluidized bed technology II, P. Basu and J.F. Large Ed., 63 (1988)
  • K. Ho, Y. Chen and C. I. Lin, “Operation parameters in the blast furnace: dimensional analysis”, Chemical Engineer, 35, 31 (1988)
  • Chen, Fundamentals of centrifugal fluidized bed, AIChE. J., 33, 722 (1987)
  • Chen and S.W. Doo, “An experimental investigation of particle size analysis by a modified Andreasen pipet”, Powder Tech., 48, 23 (1986)
  • Chen, “Higher order asymptotic solution fro heat transfer of a laminar flow passing a wedge at small Prandtl number”, International J. Heat & Mass transfer, 29, 490 (1986).
  • Chen, “A theoretical investigation of an aeration hopper flow”, J. Chinese. Chem. Eng., 17, 195 (1986)
  • Chen, “heat transfer of a laminar flow passing a wedge at small Prandtl number” International J. Heat & Mass Transfer, 28, 1517 (1985)
  • Chen, “Feasibility study of an absorption heat pump”, Chem. Eng. 128, 95 (1985)
  • Chen, S. Rangachari and R. Jackson, “Theoretical and experiemental investigation of flow in a vertical standpipe”, Ins. Eng. Chem. Fundam., 23, 354 (1984)
  • M. Lu and Y. Chen, “A study on direct contact condensation of a droplet falling through a saturated vapor atmosphere”, J. Chinese Inst. Of Engineers, 3, 95 (1980)

Selective Conference Publications

  • Chen, et al, “Keeping FCC units on track, winning the operation race with an innovative cyclone technology”, 2010 NPRA meeting
  • Chen, M. Nieskens and K.T. Wu, “A Cost-Effective Solution for Reducing FCC NOx Emission”, 2009 NPRA meeting
  • Chen and D. Brosten “A New Technology for Reducing NOX Emission from FCC Regenerators”, 2008 NPRA meeting
  • Chen and M. Richardson “Suncor FCC revamp, a win-win for the environment and FCC operation”, 2007 NPRA meeting
  • Chen et al, “Shell Third Stage Separator Technology: Evolution and Recent Advances in Third Stage Separator Technology for Applications in the FCC Process” 2006 NPRA meeting.
  • Chen et al, “Stripper Technology - How to get more Profits from FCC Units” 2005 NPRA meeting,
  • Chen, “Catalyst Circulation Enhancement Technology Provides New Opportunity for De-bottlenecking FCC Unit” 2004 NPRA meeting,
  • Chen et al., “FCC Technology – The keys to unit profitability and reliability” 2003 NPRA meeting,
  • Chen, “FCC cyclone reliability” 2002 NPRA meeting, Houston

Selected Patents

  • Chen et al, " process for the conversion of lower alkanes to aromatic hydrocarbons", U.S. Patent 8766026, July 1, 2014
  • Chen et al, " A Gas-Solids Separator", U.S. Patent 8287613, October 16, 2012.
  • Chen et al, " A Process And Apparatus For The Regeneration Of Spent FCC Catalyst", U.S. Patent 7655589, February 2, 2010.
  • Chen et al, “FCC Reactor”, U.S. Patent 7,250,140 B2, July 31, 2007
  • Chen et al, “Cyclone separator”, U.S. Patent 7,160,518 B2, Jan. 9, 2007
  • Chen et al. “Protective shroud for FCC feed nozzles and method for designing such shroud”, U.S. Patent 7,108,195 B2, September 19, 2006
  • Chen “Feed Nozzle Assembly”, U.S. Patent 2005/0109861, May 26, 2005
  • Chen “Standpipe Inlet for Enhancing Particulate Solids Circulation for Petrochemical and other processes” U. S. Patent 6,827,908, December 7, 2004
  • Chen, “Spent Catalyst distributor for Catalytic Cracking Process “ US patent 6,797,239, 2004
  • Chen et al. “ Feed Injection System for Catalytic Cracking Process “, US 6,736,960, May 18, 2004
  • Chen et al. “FCC Reactor” WO 02/086019 A2, Oct. 2002.
  • Chen et al. “Cyclone Separator” WO 02/085527 A2, Oct. 2002.
  • Duh, Y. Chen and A. Corey “Apparatus for crystallization of poly-trimethylene terephthalate (PTT)” US patent 6,461,575 B! Oct. 2002.
  • Chen et al “Integrated process for the production of 2,6- naphthalene di-carboxylic acid” US patent 6,448,436 Septemeber 10, 2002.
  • Chen, “feed injection for catalytic cracking process” US patent 6,387,247 B1 May, 14 2002.
  • Chen, “Spent Catalyst Distributor” WO-A-0242394 on 30 May 2002.
  • Duh, Y. Chen and A. Corey “Process for preparing poly-trimethylene terephthalate (PTT)” US patent 6,297,315 (2001).
  • J. Wijngaarden, Y. Chen, and D. K. Schisla, David K "Process for extraction of material from multi-phase systems” US patent 6,262,145 (2001).
  • Chen and D. J. Brostem, “Standpipe inlet enhancing particulate solids circulation for petrochemical and other processes”, US patent 6,228,328 (2001).
  • Chen, “Process for the extraction of material from multi-phase systems”, US patent 6,043,299, (2001)
  • D. Allen, R.L. June, Y. Chen and R. L. Blackbourn, “Fixed bed reactor packing”, US patent 6.013,845 (2000); worldwide patents.
  • Chen, J. W. Nielson and D. J. Brosten, “Feed nozzle”, US patent 5,979,799 (1999).
  • Chen and T. S. Dewitz “Feed Nozzle”, US patent 5794857, (1998).
  • Pamela Tetarenko et al., “Treating biomass to produce materials useful for biofuels”, US patent 9212401B2 (2015)
  • Robert Blackbourn and Paul Weider, “Treating biomass to produce materials useful for biofuels”, US patent 9290821B2 (2016)
  • Paul Weider et al., “Continuous or semi-continues process for treating biomass to produce materials useful for biofuels”, US patent 9382593B2 (2016)
  • Pamela Tetarenko et al., “Method of treating ethanol production byproducts”. US patent 9428816 B2, (2016)
  • Robert L. Blackbourn, et. al, “ process for treating biomass to produce useful material for biofuels”, US Patent 9873665 B2, (2018)
  • Chen, Robert L. Blackbourn, Sivakumar S. Vijayakumari, Paul R. Weider, Carolina Botella Franco, Yi Liang, Daniel Gagne and Ashley V. Baugh,  “production of ethanol and enhanced co-products using co-products as feedstock” Filed for US patent (2018)

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