Standard Test Method for Determination of Nitrogen Adsorption and Desorption Isotherms of Catalysts and Catalyst Carriers by Static Volumetric Measurements

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

03-11-2020

Publisher

American Society for Testing and Materials

1.1This test method covers the determination of nitrogen adsorption and desorption isotherms of catalysts and catalyst carriers at the boiling point of liquid nitrogen.2 A static volumetric measuring system is used to obtain sufficient equilibrium adsorption points on each branch of the isotherm to adequately define the adsorption and desorption branches of the isotherm. Thirty points evenly spread over the isotherm is considered to be the minimum number of points that will adequately define the isotherm.

1.2Units—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.

1.3This 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.

1.4This 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.

Committee	D 32
DocumentType	Test Method
Pages	6
PublisherName	American Society for Testing and Materials
Status	Current
Supersedes	ASTM D 4222 : 2003 : R2015 : EDT 1

ASTM E 177 : 1990 : REV A : R1996	Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
ASTM E 456 : 2002	Standard Terminology for Relating to Quality and Statistics
ASTM E 456 : 2013 : REV A : R2022	Standard Terminology Relating to Quality and Statistics
ASTM E 691 : 2020	Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ASTM E 456 : 2013 : REV A : R2017 : EDT 5	Standard Terminology Relating to Quality and Statistics
ASTM E 691 : 2019 : EDT 1	Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ASTM E 691 : 2023	Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ASTM D 3766 : 2024 : REV A	Standard Terminology Relating to Catalysts and Catalysis
ASTM D 3766 : 2024	Standard Terminology Relating to Catalysts and Catalysis
ASTM E 691 : 2022	Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ASTM E 691 : 2009	Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ASTM E 691 : 2021	Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ASTM E 456 : 2013 : REV A : R2017 : EDT 4	Standard Terminology Relating to Quality and Statistics
ASTM E 456 : 2013 : REV A : R2017 : EDT 6	Standard Terminology Relating to Quality and Statistics