ASTM D7084

This test method is a means of determining the crushing strength of a catalyst in a bed. Techniques to measure the crushing strength of formed catalyst particles is limited to crushing of individual particles, which may not be related to how the catalyst will crush in a reactor or bed. For some catalysts, such as granules, this technique may be the only viable method for obtaining crushing strength. The production of fines in a reactor is not desired because of the potential of bed compaction and the pressure buildup in the reactor.

1. Scope

1.1 This test method covers the determination of bulk crush strength of a bed of formed catalyst particles ¹/₃₂ to ³/₁₆ in. (0.8 to 4.8 mm) in diameter and is intended to provide information concerning the ability of the catalyst material to maintain physical integrity.

1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered 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 and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents

ASTM Standards
D3766 Terminology Relating to Catalysts and Catalysis
D4180 Test Method for Vibratory Packing Density of Formed Catalyst Particles and Catalyst Carriers
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E456 Terminology Relating to Quality and Statistics
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

Index Terms

bulk crush strength; bulk density; formed catalyst particles; Catalysts/catalyst carriers; Crushing strength; ICS Number Code 71.100.99 (Other products of the chemical industry)

Citing ASTM Standards

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