ASTM-D4222 2015

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D4222-03(2015)e1 Standard Test Method for Determination of Nitrogen Adsorption and Desorption Isotherms of Catalysts and Catalyst Carriers by Static Volumetric Measurements

Published By	Publication Date	Number of Pages
ASTM	2015	6

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Description

ASTM D4222-03-e1-Reapproved2015

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

ASTM D4222

Scope

1.1 This 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.

1.2 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.

Keywords

adsorption; catalysts; desorption; isotherms; nitrogen gas; volumetric;

ICS Code

ICS Number Code 17.060 (Measurement of volume, mass, density, viscosity)

DOI: 10.1520/D4222-03R15E01

Additional information

Standard Title	D4222-03(2015)e1 Standard Test Method for Determination of Nitrogen Adsorption and Desorption Isotherms of Catalysts and Catalyst Carriers by Static Volumetric Measurements
Published Code	ASTM
Publication Date	2015
Pages Count	6