ASTM D4824-13 PDF

Scope: 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.

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 the standard. The values given in parentheses are for information only.

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 and health practices and determine the applicability of regulatory limitations prior to use.

ASTM D4824-13 Referenced Document

ASTM D3766 Standard Terminology Relating to Catalysts and Catalysis
ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

2024 ASTM D4824-24 Standard Test Method for Determination of Catalyst Acidity by Ammonia Chemisorption
2018 ASTM D4824-13(2018) Standard Test Method for Determination of Catalyst Acidity by Ammonia Chemisorption
2013 ASTM D4824-13 Standard Test Method for Determination of Catalyst Acidity by Ammonia Chemisorption
2003 ASTM D4824-03(2008) Standard Test Method for Determination of Catalyst Acidity by Ammonia Chemisorption
2003 ASTM D4824-03 Standard Test Method for Determination of Catalyst Acidity by Ammonia Chemisorption
1999 ASTM D4824-94(1999) Standard Test Method for Determination of Catalyst Acidity by Ammonia Chemisorption