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ASTM D4824-24

Current Revision

Standard Test Method for Determination of Catalyst Acidity by Ammonia Chemisorption

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1.1 This test method covers the determination of acidity of catalysts and catalyst carriers by ammonia chemisorption. A volumetric measuring system is used to obtain the amount of chemisorbed ammonia.

1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


5.1 This test method can be used to determine the acidity of catalysts and catalyst carriers by ammonia chemisorption for materials specifications, manufacturing control, and research and development in the evaluation of catalysts.

SDO ASTM: ASTM International
Document Number D4824
Publication Date Feb. 1, 2024
Language en - English
Page Count 3
Revision Level 24
Supercedes
Committee D32.01
Publish Date Document Id Type View
Feb. 1, 2024 D4824-24 Revision
April 1, 2013 D4824-13 Revision
Oct. 1, 2003 D4824-03 Revision
Nov. 1, 2018 D4824-13R18 Reaffirmation
April 1, 2008 D4824-03R08 Reaffirmation
Oct. 10, 1999 D4824-94R99 Reaffirmation