ASTM-D3663 › Historical Revision Information
Standard Test Method for Surface Area of Catalysts and Catalyst Carriers
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This test method establishes the standard procedure for determining the surface areas of catalyst and catalyst carriers that have Type II or IV nitrogen adsorption isotherms, and specified minimum area. A volumetric measuring system is used to obtain at least four data points which fit on the linear BET line. The surface area of a catalyst or catalyst carrier is determined by measuring the volume of nitrogen gas adsorbed at various low-pressure levels by the catalyst sample. Pressure differentials caused by introducing the catalyst surface area to a fixed volume of nitrogen in the test apparatus are measured and used to calculate BET surface area.
Scope
1.1 This test method covers the determination of surface areas of catalyst and catalyst carriers that have Type II or IV nitrogen adsorption isotherms, and at least 1 m2/g of area. A volumetric measuring system is used to obtain at least four data points which fit on the linear BET line.
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
catalyst; nitrogen adsorption; surface area; Catalysts/catalyst carriers; Nitrogen adsorption; Surface analysis--catalysts
To find similar documents by ASTM Volume:
05.05 (Combustion Characteristics; Manufactured Carbon and Graphite Products; Catalysts)
05.06 (Gaseous Fuels; Coal and Coke)
To find similar documents by classification:
71.040.30 (Chemical reagents Including reference materials)
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Document Number
ASTM-D3663-03(2008)
Revision Level
2003 R08 EDITION
Status
Superseded
Modification Type
Reapproval
Publication Date
April 1, 2008
Document Type
Test Method
Page Count
5 pages
Committee Number
D32.01