Work Item
ASTM WK71860

New Test Method for Acid Site Characterization on Zeolites Using Dynamic Flow Method

1. Scope

This test method covers the determination of the desorption of propylamine during a constant temperature ramp and quantification of acid site concentration in Zeolites.


Zeolite; Acid sites; Dynamic flow; propylamine; propylene, Temperature programmed desorption


This test method complements the dynamic ammonia chemisorption followed by a temperature programmed desorption (TPD). This method is most useful as screening tools to measure relative acid site concentrations on zeolites. It may be extended to other solid-state acidic catalysts provided that the user exercises care in optimizing the pretreatment and measurement conditions for the catalyst being tested.

The title and scope are in draft form and are under development within this ASTM Committee.


Developed by Subcommittee: D32.01

Committee: D32

Staff Manager: Kelly Paul

Work Item Status

Date Initiated: 02-09-2020

Technical Contact: Francisco Sotomayor

Item: 000