PSRI is world-renowned for its contribution to the fluidization communities. Most of our research is proprietary, but PSRI does publish key findings in the open literature in order to promote more discussion of and insight to problems. We work closely with many universities and national labs throughout the world. Our recent publications are presented below.
May 23, 2017
Shyam Sundaram, Allan Issangya, S.B. Reddy Karri, R.A. Cocco, T.M. Knowlton, B.Freireic- 12th International Conference on Fluidized Bed Technology, Krakow, Poland
The internals in fluidized bed... More detail
May 23, 2017
Allan S. Issangya, S.B. Reddy Karri, Ray A. Cocco, Ted Knowlton, 12th International Conference on Fluidized Bed Technology, Krakow, Poland
Fluid catalytic cracking (FCC) risers operate at solids circulation... More detail
May 23, 2017
Yeook Arrington, S.B. Reddy Karri, Ray Cocco, 12th International Conference on Fluidized Bed Technology, Krakow, Poland
Particle attrition can be a major issue in using catalyst particles in fluidized beds and circulating... More detail
May 26, 2013
Ray Cocco, Jennifer McMillan, Roy Hays, S.B. Reddy Karri, Fluidization XIV, The Netherlands
Many of our fluidized bed unit operations involve liquid injection. Yet, how the liquid and solids interact in these... More detail
May 26, 2013
Allan Issangya, S.B. Reddy Karri, Ted Knowlton, Ray Cocco, FluidizationXIV, The Netherlands.
Differential pressure fluctuations are routinely measured in fluidized beds to delineate fluidization regimes,... More detail
March 22, 2012
Chew, J. W. , Roy Hays, John G. Findlay, S.B. Reddy Karri, Ted M. Knowlton, Ray A. Cocco, Christine M. Hrenya, Powder Technology 221, 1–12 (2012).
Experiments involving monodisperse Geldart... More detail
November 30, 2011
Chew, J. W. , Roy Hays, John G. Findlay, S.B. Reddy Karri, Ted M. Knowlton, Ray A. Cocco, Christine M. Hrenya, Chemical Engineering Science 66, 4595–4604 (2011).
Experiments... More detail
November 13, 2011
J.W. Chew, D.M. Parker, R.A. Cocco C.M. Hrenya, Chemical Engineering Journal 178, 348–358 (2011).
Gas–solids circulating fluidized bed (CFB) experiments have been carried out with... More detail
September 16, 2011
Chew, J.W., R. Hays, J.G. Findlay, T.M. Knowlton, S.B.R. Karri, R.A. Cocco, C.M. Hrenya, Chemical Engineering Science 68, 82-93 (2012).
Experiments... More detail
September 16, 2011
Chew, J.W., R. Hays, J.G.Findlay, T.M. Knowlton, S.B.R.Karri, R.A. Cocco, C.M. Hrenya, Chemical Engineering Science 68, 72–81 (2012).
Experiments in a circulating... More detail
August 4, 2011
Chew, J.W., R. Hays, J.G. Findlay, T.M. Knowlton, S.B.R. Karri, R.A. Cocco, C.M. Hrenya, Powder Technology 214, 89–98 (2011).
High-speed video... More detail
December 15, 2010
Cocco, R., R. Hays, S. Karri, and T. Knowlton. The Effects of Cohesive Forces on Catalyst Entrainment in Fluidized Bed Reactors. Advances in Fluid Catalytic Cracking: Testing, Characterization and... More detail
October 25, 2010
R. Cocco, F. Shaffer, R. Hays, S.B.R. Karri, T.M. Knowlton, Powder Technology 203 (2010) 3-11.
High-speed video imaging of particle clusters in and above a fluidized bed suggests... More detail
June 28, 2010
R. Cocco, Y. Arrington, R. Hays, J. Findlay, S. Karri, Powder Technology 200 (2010) 224-233.
Jet cup attrition testing is a common method for evaluating particle attrition in fixed fluidized beds... More detail
May 5, 2010
A.S. Issangya, S.B.R. Karri, T.M. Knowlton, in “Fluidization XIII” (S.D. Kim, Y. Kang, J.K. Lee, Y.C. Seo, eds.) Engineering Conferences International, Gyeong ju, Korea, p. 105.
Tests were... More detail
May 5, 2010
R. Cocco, S.B.R. Karri, Y. Arrington, R. Hays, J. Findlay, T.M. Knowlton, in “Fluidization XIII” (S.D. Kim, Y. Kang, J.K. Lee, Y.C. Seo, eds.) Engineering Conferences International, Gyeong... More detail
May 5, 2010
R. Cocco, F. Shaffer, S.B.R. Karri, R. Hays, T.M. Knowlton in “Fluidization XIII” (S.D. Kim, Y. Kang, J.K. Lee, Y.C. Seo, eds.) Engineering Conferences International, Gyeong ju, Korea,... More detail
May 13, 2008
R. Hays, S.B.R. Karri, R. Cocco, T.M. Knowlton in “Circulating Fluidized Bed Technology IX” (J. Wertehr, W. Nowak, K-E Wirth, E-U Hartge eds.) TuTech Innovation GmbH, Hamburg, p. 3... More detail
May 13, 2008
A.S. Issangya, S.B.R. Karri, T.M. Knowlton in “Circulating Fluidized Bed Technology IX” (J. Werther, W. Nowak, K-E Wirth, E-U Hartge eds.) TuTech Innovation GmbH, Hamburg, p. 338
... More detail
May 10, 2007
A.S. Issangya, T.M. Knowlton, S.B.R. Karri in “Fluidization XII” (F. Berruti, T. Pugsley eds.) ECI Publications, Harrison Hot Springs, Canada, p. 95.
Tests were conducted... More detail
May 10, 2007
S.B. Reddy Karri, Ted M. Knowlton, J.S. Smith in “Fluidization XII” (F. Berruti, T. Pugsley eds.) ECI Publications, Harrison Hot Springs, Canada, p. 326.
A general procedure that can be... More detail
February 16, 2005
Knowlton, T.M., S.B.R. Karri, A. Issangya, Powder Technology 150 (2005) 72-77.
The scale-up of fluidized beds is not an exact science. However, using proven techniques... More detail
May 28, 2002
S.B. Reddy Karri, T.M. Knowlton in “Circulating Fluidized Bed Technology VII” (J.R. Grace, J-X. Zhu, H. de Lasa, eds.) Canadian Society of Chemical Engineering, Ottawa... More detail
August 9, 2000
S. Benyahia, H. Arastoopour, T.M. Knowlton, H. Massah, Powder Technology 112 (2000) 24-33.
Gas/particle flow behavior in the riser section of a circulating fluidized bed CFB was simulated... More detail
May 1, 2000
T.M. Knowlton, Oil and Gas Science and Technology Revue de l’Institut Francais du Petrole, 55 (2000) 209-217.
Two-phase, gas-solid processes are extremely difficult to operate. &n... More detail