PSRI Consulting

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


Technical Director, Particulate Solid Research Inc., Chicago, IL — 2017 to Present

Develop and manage PSRI membership and contract research along with maintaining and expanding PSRI state of the art research facilities.

Research Scientist, Dow Chemical, Midland, MI — 2010 to 2017

Plant support and technology lead with general solids processing issues including bin design, fluidized beds, pneumatic conveying, mixing and blending, segregating systems, size reduction, etc. Technology development for predicting and managing catalyst deactivation due to preferential attrition in circulating fluidized bed systems. Developed and implemented reactor models Dow developed circulating fluidized bed technology.


Graduate Research Assistant, Purdue University — 2006 to 2010

A Compartmental Approach to Studying Particle Motion in Mixers Using DEM


  • Purdue University — PhD in Mechanical Engineering, 2010
  • Purdue University — MS in Mechanical Engineering, 2008
  • Milwaukee School of Engineering— BS in Mechanical Engineering, 2006


  • AIChE 35 under 35 Award, 2017
  • Dow Core R&D Young Researcher Award, 2015
  • IFPRI Poster Award, 2009
  • William K and Gail E. Cordier Fellowship Award, 2006, 2007 Committees


  • Mathematica, DEM, Whiteboard


Fan, Y, Karl, J., Freireich, B., and Lueptow, R., 2017, "Segregation of granular materials in bounded heap flow: a review." Powder Technology, Vol. 317, 67-88.

Bleier, B., Yezer, B., Freireich, B., Anna, S., and Walker, L., 2017, “Droplet-Based Characterization of Surfactant Efficacy in Colloidal Stabilization of Carbon Black in Nonpolar Solvents,” Journal of Colloid and Interface Science, Vol. 493, 265-274.

Kodam, M., Freireich, B., Pretz, M., Stears, B., 2017, “Performance Prediction of Riser Termination Devices Using Barracuda,” Powder Technology, in press.

Fan, Y. and Freireich, B., 2017 “Solids-Solids Mixing” Perry’s Chemical Engineering Handbook, in press.

Freireich, B., 2017 “Size Enlargement” Perry’s Chemical Engineering Handbook 9th Ed., in press.

Ketterhagen, W., Aliseda, A., am Ende, M., Berchielli, A., Doshi, P., Freireich, B., and Prpich, A., 2016, “Modeling tablet film-coating processes,” Predictive Modeling of Pharmaceutical Unit Operations, ed. Pandey, P., and Bharadwaj, R., Woodhead Publishing.

Schlick, C., Isner, A., Freireich, B., Fan, Y., Umbanhowar, P., Ottino, J., Lueptow, R., 2015, “A Continuum Model for Segregation of Polydisperse Granular Materials,” Journal of Fluid Mechanics, Vol. 797, 95-109.

Freireich, B., Kumar, R., Ketterhagen, W., Su, K., Wassgren, C., Zeitler, JA., 2015, “Comparisons of intra-tablet coating variability using DEM simulations, asymptotic limit models, and experiments,” Chemical Engineering Science, Vol. 131, pp. 197-212.

Freireich, B., Kodam, M., Jacob, K., 2015, “Exploring the Interplay Between Abrasive Attrition and Separation in Cyclones,” Powder Technology, Vol. 273, pp. 210-219.

Kumar, R., Freireich, B., Wassgren, C.R., 2014, “DEM-Compartment-Population Balance Model for Particle Coating in a Horizontal Rotating Drum,” Chemical Engineering Science, Vol. 125, pp. 144-157.

Freireich, B. and Li, J., 2013, “A Renewal Theory Approach to Understanding Inter-Particle Coating Variability” Powder Technology, Vol. 249, pp. 330-338.

Freireich, B. and Jacob, K., 2013, “Exploring the Interplay Between Attrition and Separation,” Fluidization XIV.

Kariuki, W.I.J., Freireich, B., Smith, R.M., Rhodes, M., and Hapgood, K.P., 2013, “Distribution Nucleation: Quantifying Liquid Distribution on the Surface of Particles Using the Dimensionless Particle Coating Number Φp,” Chemical Engineering Science, Vol. 92, pp. 134-145.

Li., J., Freireich, B., Wassgren, C.R., Litster, J.L., 2013, “Experimental Validation of a 2-D Population Balance Model for Spray Coating Processes,” Chemical Engineering Science, Vol. 95, pp. 360-365.

Li., J., Freireich, B., Wassgren, C.R., Litster, J.L., 2012, “A General Compartment-Based Population Balance Model for Particle Coating and Layered Granulation,” AIChE Journal, Vol. 58, No. 5, pp. 1387-1408.

Freireich, B., Li, J., Litster, J.D., and Wassgren, C.R., 2011, “Incorporating Particle Flow Information from Discrete Element Simulations in Population Balance Models of Mixer-Coaters,” Chemical Engineering Science, Vol. 66, No. 16, pp. 3592-3504.

Freireich, B., Ketterhagen, W.R., and Wassgren, C.R., 2011, “Intra-Tablet Coating Variability for Several Pharmaceutical Tablet Shapes,” Chemical Engineering Science, Vol. 66, No. 12, pp. 2535-2544.

Freireich, B., Kodam, M., and Wassgren, C., 2010, “An Exact Method for Determining Local Solid Fractions in Discrete Element Method Simulations,” AIChE Journal, Vol 56., No. 12, pp. 3036-3048.

Freireich, B. and Wassgren, C., 2009, “Intra-particle coating variability: Analysis and Monte-Carlo simulations,” Chemical Engineering Science, Vol. 64, No. 3, pp. 1117-1124.

Freireich, B., Litster, J.D., and Wassgren, C.R., 2009, “Using the Discrete Element Method to Predict Collision-Scale Behavior: A Sensitivity Analysis”, Chemical Engineering Science, Vol. 64, No. 15, pp. 3407-3416.

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