ASTM WK71860

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

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    Developed by Subcommittee: D32.01 | Committee D32 | Contact Staff Manager



    WK71860

    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.


    Keywords

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

    Rationale

    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.

    Citing ASTM Standards
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    Work Item Status

    Date Initiated:
    02-09-2020

    Technical Contact:
    Francisco Sotomayor

    Status:
    Draft Under Development