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ASTM D4438-85(2007)

Заменен
Standard Test Method for Particle Size Distribution of Catalytic Material by Electronic Counting — 3 стр.
Значение и использование

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.

Область применения

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.

ICS
19.120 Particle. Including test sieves and porosimetry / Ситовый анализ. Просеивание. Включая контрольные сита и измерение пористости
Сборник ASTM
05.06 Gaseous Fuels; Coal and Coke; Catalysts; Bioenergy and Industrial Chemicals from Biomass / Газовое топливо; Уголь и кокс; Катализаторы; Биоэнергетика и промышленные химикаты из биомассы
Тематика
Catalysts