Here is a TimeLine of the PSRI History.

Timeline

2017

Dr. Ben Freireich is PSRI's Technical Director

Dr. Ben Freireich joins as PSRI's Technical Director
2017

Dr. S.B. Reddy Karri Advances to Consulting Director

Dr. Reddy Karri moved from his role as Technical Director at PSRI to Consulting Director. He will be responsible for expanding PSRI's consulting role with member companies ...
2016

Role of Internals on Fluidized Bed Hydrodynamics

Fluidized bed internals can significantly lower the operating bed density as well as reduce the dynamic pressure on those internals. The presences of internals increases the bubble volume fraction as a result of higher bubble frequencies, smaller bubble sizes and slower bubble velocities.
2015

Vortex Stabilizer Can Mitigate the Effects of Poor Trickle Valve Operations

PSRI discovers that a vortex stabilizer can re-introduce the upflow of solids from a leaky trickle valve back to the cyclone wall thereby mitigating the impact a poor trickle valve can have on cyclone operations.
2014

Influence of Trickle Valve performance on Cyclone Efficiency

PSRI quantifies how leakage from a trickle valve can be the controlling factor on a cyclone's collection efficiency. A leaky trickle valve can impose upward gas flows in the dipleg of more than 3 to 4 ft/sec. This results in a significant injection of fines into the inner vortex of the cyclone which results in much lower collection efficiencies.
2014

A New 3-ft (0.9-m)-Diameter Stripper

PSRI commissions a new 3-ft (0.9-m)-diameter by 25-ft (7.6-m) tall stripper fed with two risers to allow for solids fluxes of more than 25 lb/ft2-sec (125 kg/m2-sec).
2014

Dynamic Force Sensors

PSRI develops dynamic force sensors for quantifying dynamic and static forces on fluidized bed internals such as stripper elements and cooling coils.
2013

PSRI Moves to its New Office Complex

December 15, 2013 PSRI moves into its new office complex.
2013

PSRI Purchases 5 Acres of Property

PSRI purchases 5 acres of property that contained its existing research facility plus additional facilities for future expansion.
2013

Fluorescent Solids Tracer Technique

PSRI develops its second generation fluorescent solids tracer technique that provides a 10X increase in the signal to noise ratio which now makes it useful not only in fluidized beds but also in strippers and risers.
2013

Method for Using Accelerometers

PSRI develops a method for using accelerometers on the outside of cyclones and strippers for detecting the onset of flooding.
2012

Liquid Injection into Fluidized Beds

PSRI, along with Syncrude, uses high speed video to discern the mechanism for particle coating and agglomeration by using liquid injection into a fluidized bed.
2012

Advancing Standpipe Designs

PSRI uses CFD to confirm earlier work where protrusions may help with standpipe pressure build.
2012

Using Acoustic to Detect Flooding in a Stripper

PSRI used inexpensive accelerometers on a stripper to detect flooding.
2011

Particle Segregation in Risers

Segregation in the particle distributions based on size and density were evaluated in a riser for small and large glass beads and large polyethylene powder.
2011

Cyclone Erosion

PSRI demonstrates how vortex stabilizers can reduce cone erosion in secondary cyclones.
2011

Quantifying Clusters in a Riser

Using fiber optic probes and wavelet decomposition, PSRI and the University of Colorado measured cluster appearance, duration, and frequency in all parts of a riser for smaller and larger Geldart Group B material.
2010

Office of President and CEO

July 1, 2010 - Ray A. Cocco became the President and CEO of PSRI, Inc.
2010

Clusters and Streamers in Risers

PSRI and NETL quantify cluster behavior using high speed video analysis for the hydrodynamics in a riser.
2010

Less Intrusive Fiber Optic Probes

PSRI uses CFD to confirm that fiber optic probes can be intrusive and that a shield may mitigate this effect.
2010

New Technical Director

Dr. S.B. Reddy Karri became the new technical director of PSRI. He is a third technical director in the history of PSRI.
2009

Granular Temperature in a Riser

PSRI and NETL use high-speed video and a modified borescope to quantify the granular temperature in a riser with FCC catalyst powder.
2008

Visualized Particle Clusters In and Above the Fluidized Bed

Using a custom boroscope and high speed video camera, particle clusters are captured in and above a fluidized bed of polyethylene and FCC powder.
2008

PSRI Round Robin Reveals Deficiency in PSD Measurements

PSRI performs a round robin with seven other companies. Most diffraction techniques are incapable of providing fines results for bimodal distributions with the exception of Sympatec.
2007

New Jet Cup Design for Measuring Particle Attrition

PSRI confirms that existing jet cup attrition testing is insufficient. PSRI redesigns the jet cup to provide quantitative ordering of material with respect to attrition rates in a fast fluidized bed unit.
2006

Fine Particles May Lower Entrainment Rates

PSRI documents how the addition of fines could actually lower the entrainment rate for fluidized beds.
2004

Gas Bypassing in Fluidized Beds

Gas bypassing is documented for deep fluidized beds of Geldart Group A powders.
2003

Analysis of Cyclone Flow Patterns

Cyclone operation is examined with respect to riser termination and solids loadings.
2002

Core-Annulus Profile with Upflow or Downflow at the Walls

Flow regime maps for riser performance including regions where upflow or downflow is at the walls.
2001

Streaming or Ribbon Flow in Diplegs

Design and operating specifications to prevent streaming flow in cyclone diplegs are developed.
2001

Dipleg Splash Plate Design and Operation

Design criteria for open area is needed for trouble free dipleg operations with splash plates.
2001

Design and Operating Specs for Trickle Valves

Design and operating specifications for trickle valves on secondary cyclones are developed.
2000

Second PSRI Challenge Problem

Similar to the first challenge problem, validation data from 8” ID x 72’ riser is made available to the modeling community.
2000

PSRI Develops Optical Fiber Probe for Solids Concentration

PSRI notes the nonlinear behavior of commonly used optical fiber probes. Redesigns probe to minimize this nonlinearity.
1999

PSRI Joins MFDRC

PSRI joins the Multiphase Fluid Dynamics Consortium (MFDRC), a five year program designed to better develop CFD codes for granular-fluid systems.
1998

Design Specs for Feeding Standpipes

Design procedures are developed for standpipe configurations and the feeding of those standpipes.
1995

PSRI Presents First Challenge Problem

In an effort to provide the modeling community with validation data, PSRI provides data for an 8” ID x 72’ riser with an L-valve configuration.
1995

Gas-Solid Jet Penetration Correlations Developed

Jet penetration correlations modified for systems where solid particles are in the gas jets.
1992

Choking and Saltation Velocity Correlations

Flow regimes are mapped. Correlations of choking and saltation velocities in dilute phase conveying is developed.
1992

Design and Operation Procedures for Standpipes

Design specification and operating procedures, including aeration requirements, are developed for smooth standpipe operations for Geldart Group A and B powders.
1991

Entrainment and Critical Gas Correlation Developed

A new correlation for predicting the entrainment rate above TDH is developed. It is based on the coordinate system which was used to correlate the choking-velocity data in dilute-phase pneumatic conveying. A more accurate correlation to predict the critical velocity is also developed.
1990

Jet Penetration Correlations Developed

Correlations for gas jets in a fluidized bed with a upward, downward or horizontal configuration is developed.
1989

Design and Operating Criteria for Dense Phase Conveying

Design and operating criteria is developed for dense phase conveying. Correlations for capacity is developed.
1988

Core-Annulus Profile in Risers Revealed

PSRI confirms reports that a core-annulus profile in a large-scale riser can exist.
1987

PSRI Moves to Chicago

IGT and IIT provide experimental facilities for PSRI. Ted M. Knowlton becomes Technical Director.
1985

Cyclone Attrition

Power law model for particle attrition in cyclones.
1980

Particle Classifier Devlopment

Evaluation of Bahco Microparticle Classifier and subsequent development of PSRI classifier.
1976

Pressure Drop in Cyclone Correlation Developed

Pressure drop correlation based on inlet, acceleration, barrel friction, and deceleration effects is developed.
1975

Aeration Requirements for Dilute Phase Pneumatic Conveying

Design specification for aeration of a dilute phase conveying line with respect to feeding and elbows is developed.
1973

Development of Gas Distribution Requirements

Design specifications for hole and pressure drop requirements to ensure good fluidization is developed.
1971

Formation of PSRI

A consortium consisting of 9 companies is formed to address better understanding in particle technology. Fred Zenz is the Technical Director.