• PSRI Annual TAC Meeting

    PSRI Annual TAC Meeting

    The PSRI Annual Technical Advisory Committee meeting will be the week of June 23rd, 2025. It will take place at the W Lakeshore Chicago Hotel. Registration will open soon! Read More
  • Fluidization Seminar and Workshop

    Fluidization Seminar and Workshop

    The PSRI Fluidization Seminar is an immersive workshop focused on the intricacies of fluidization processes, covering fundamental hydrodynamics, gas distributor design, circulating fluidized beds, cyclone design, and both dilute and dense-phase conveying. Participants will delve into particle entrainment, erosion, particle attrition, standpipes, and solids flow systems. The seminar features hands-on workshops and practical insights from industry experts, with materials provided via dedicated tablets to ensure an interactive learning experience. Read More
  • Consulting Talent

    Consulting Talent

    PSRI has over 300 years of cumulative experience in particle technology with the best experts in the world.



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






Visit our Consulting Site!
/Solutions
Solutions
PSRI works with hundreds of clients from all over the world in such industries as petrochemical, chemical, pharmaceutical, agricultural, power and energy, mining, food processing, and semiconductors. Chances are we have already seen your problem and know how to drive your success.

Check out the PSRI Solutions!
/Training
Training
We don’t stop at solution space. We believe that training is an important part of maintaining success. Thus, PSRI offers intensive fluidization seminars all over the world, provides design manuals, procedures, methods, and webinars. PSRI believes that giving someone a fish is not as good as teaching someone how to fish.
Upcoming Seminar Dates
/Research
Research
PSRI has state of the art facilities to do research on an industrial scale. As a result, PSRI’s research is relevant to your problems and your bottom line. That is because wall effects matter, pressure effects matter, and temperature effects matter. With PSRI’s research, the data is relevant and applicable.
What we Research?

Standpipes

June 22, 2010

Standpipes have been in use for over 60 years.  The standpipe was invented by a research team from the Jersey Standard Company in the 1940s working on feeding cracking catalyst into fluidized beds to produce gasoline for the war effort.  The primary purpose of a standpipe is to transfer solids from a region of lower pressure to a region of higher pressure.  Standpipes are usually part of circulating fluidized bed systems.  In addition, cyclone diplegs are essentially overflow standpipes.  Historically, standpipes, including cyclone diplegs, have proven to be more problematic than other components of fluid-particle systems.  PSRI has conducted systematic research on vertical, angled, and hybrid standpipes over the past 25 years to gain more insight into the design and reliable operation of these standpipes.  PSRI has conducted experiments to understand the operation of standpipes and to develop design correlations.  

 

Tests revealed that the two most important design aspects of standpipes are: 1) proper inlet geometry to minimize the dragging of voids into the standpipe, and 2) the amount and distribution of the external aeration to overcome gas compression.

 

Industry continues to demand greater reliability and often higher solids transfer rates from their fluidized solids transfer systems.  Improved troubleshooting tools will help make better use of time and help bridge the knowledge gap where experience is low.  The PSRI standpipe program attempts to meet this need by conducting fundamental research, and testing and analysis in the following areas:

 

  1. •Inlet Geometry & Performance Predictions

  2. •Optimum Aeration for: Group A vs. Group B vs. Group A/C Materials

  3. •Internals to Improve the Permeability of Gas into the Emulsion Phase

  4. •Effect of Gas Pressure on Standpipe Pressure Build-Up

  5. •Development of an Improved Standpipe Correlation

  6. •CFD Analysis