Standard Historical Last Updated: Dec 16, 2013 Track Document
ASTM D4438-85(2007)

Standard Test Method for Particle Size Distribution of Catalytic Material by Electronic Counting

Standard Test Method for Particle Size Distribution of Catalytic Material by Electronic Counting D4438-85R07 ASTM|D4438-85R07|en-US Standard Test Method for Particle Size Distribution of Catalytic Material by Electronic Counting Standard new BOS Vol. 05.06 Committee D32
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Significance and Use

This test method can be used to determine particle size distributions for material specifications, manufacturing control, and research and development work in the particle size range usually encountered in fluidizable cracking catalysts.

Scope

1.1 This test method covers the determination of particle size distribution of catalyst and catalyst carrier particles using an electroconductive sensing method and is one of several valuable methods for the measurement of particle size.

1.2 The range of particle sizes investigated was 20 to 150 m (see IEEE/ASTM SI 10) equivalent spherical diameter. The technique is capable of measuring particles above and below this range. The instrument used for this method is an electric current path of small dimensions that is modulated by individual particle passage through an aperture, and produces individual pulses of amplitude proportional to the particle volume.

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.

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Details
Book of Standards Volume: 05.06
Developed by Subcommittee: D32.02
Pages: 3
DOI: 10.1520/D4438-85R07
ICS Code: 19.120