Educational Resources
for Particle Technology

Since 1998 ERPT has provided on-line, just-in-time, world-wide, free-of-charge tutorials
in particle technology as a public service of the Particle Technology Forum of the AIChE.

cross-linked encyclopedic articles


technical publications and abstracts

The Significance of PT
Formation from Gas
Formation from Liquid
Comminution, Attrition
Size Enlargement
Particle Physics
Particle Characterization:
   Non-Optical Methods
   Optical Methods
Storage / Discharge:
   Mechanics: wall stress
   Dynamics: flow
Pneumatic Conveying
Fluidized Bed
Separation by Size
P./Gas Separation
P./Liquid Separation
Dispersion in Fluids
Heating, Drying
Simulation, Modeling
Specific Applications
Outline of PT
Books on PT
Other Ed Resources:
      technical reviews
      CDROM, video
      Web courses
      short courses
      teaching methods
Contents of ERPT
      Vol. 1 (1999)
      Vol. 2(1) (2001)
      Vol. 2(2) (2001)
      Vol. 3 (2002)
      Vol. 4 (2003)
      Vol. 5 (2005)

ERPT Authors' Guide
How ERPT Evolved

What's Happened Lately?

2008 Oct 28 -- We have posted a new article, "Guidelines to Prevent Particle Jamming or Structural Blockages" on the Dynamics: flow page.


ERPT provides
-- tutorials at the undergraduate and graduate level
-- ideas and examples for enriching classes and laboratories
-- typical solutions for common industrial problems

Professional oversight of the ERPT site is provided by the Particle Technology Forum, a technical division of the American Institute of Chemical Engineers.
Web site design, editing, and maintainance is provided by the Managing Editor of ERPT, Ralph D. Nelson, Jr., Ph.D., P.E., Fellow of the AIChE

Are You a Potential Author?

If you have prepared educational material on some topic in Particle Technology please consider publishing it in ERPT. See our Authors' Guide, read some of our articles, and then drop a note to the Managing Editor at

Origin / History

ERPT was launched in 1998 as a public education service of the Particle Technology Forum. This Web site provides on-line, just-in-time, world-wide, free-of-charge tutorials in particle technology as a public service. The original goal was to build a site that would eventually provide several hundred tutorials, each equivalent to one to three hours of classroom instruction at the third-year college level. These would be introductory in nature and in the ideal case would describe the main phenomenological and theoretical aspects of the topic, noting industrial applications, large-scale equipment, typical industrial problems, and typical solutions to those problems.

Over the past ten years usage has grown to over ten thousand visits per month. See History of ERPT

Potential Successor

Wikipedia has many well-written articles in the field of particle technology, so we have a link to it on this page. Unfortunately Wikipedia [with some exceptions]
   -- allows people with no qualifications to revise a posted article
   -- does not allow the authors of an article to post their names or credentials
   -- has no provision for review of articles or oversight by a professional organization
These policies reduce the incentive for qualified people to post good material and make it difficult for someone who does not already know the subject matter to judge the reliability of the material in an article posted on Wikipedia.

The Particle Technology Forum is actively considering Wikipedia among several other options for the future development of ERPT.

Explanations and Disclaimers
Questions? Email the Managing Editor at