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ASTM D4365-19

Current Revision

Standard Test Method for Determining Micropore Volume and Zeolite Area of a Catalyst

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1.1 This test method covers the determination of total surface area and mesopore area. From these results are calculated the zeolite area and micropore volume of a zeolite containing catalyst. The micropore volume is related to the percent zeolite in the catalyst. The zeolite area, a number related to the surface area within the zeolite pores, may also be calculated. Zeolite area, however, is difficult to interpret in physical terms because of the manner in which nitrogen molecules pack within the zeolite.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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. For a specific precautionary statement, see Note 3.

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 gas adsorption method complements the X-ray procedure of Test Method D3906. This test method will be useful to laboratories that do not have X-ray diffractometers. Each test method can be calibrated by use of an appropriate series of mechanical mixtures to provide what may be termed percent zeolite. If there is disorder in the zeolite, the adsorption method will yield higher values than the X-ray method. The reverse will be true if some zeolite pores (micropores) are blocked or filled.

SDO ASTM: ASTM International
Document Number D4365
Publication Date July 1, 2019
Language en - English
Page Count 6
Revision Level 19
Supercedes
Committee D32.01
Publish Date Document Id Type View
July 1, 2019 D4365-19 Revision
April 1, 2013 D4365-13 Revision
Aug. 15, 1995 D4365-95 Revision
April 1, 2008 D4365-95R08 Reaffirmation
April 1, 2007 D4365-95R07E01 Reaffirmation
Aug. 15, 1995 D4365-95R01 Reaffirmation