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ASTM D4567-99
Standard Test Method for Single-Point Determination of Specific Surface Area of Catalysts and Catalyst Carriers Using Nitrogen Adsorption by Continuous Flow Method
4 стр.
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81.12 $ (включая НДС 20%)
Разработчик:
Зарубежные/ASTM
ICS:
71.040.30 Chemical. Including reference materials / Химические реактивы. Включая эталонные материалы
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
Описание
Область применения

1.1 This test method covers the single-point determination of the surface area of catalysts and catalyst carriers that exhibit Type II or Type IV nitrogen adsorption isotherms using a nitrogen-helium flowing gas mixture. This test method is applicable for the determination of total surface areas from 0.1 to 300 m , where rapid surface area determinations are desired.

1.2 Since the single-point method uses an approximation of the BET equation, the multipoint BET method (D3663) is preferred to the single-point method.

1.3 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Ключевые слова:
Automated procedures-petroleum products; BET equation; Catalysts; Flow and flow rate-petroleum products; Isotherm techniques; Nitrogen adsorption; Single point determination; Surface analysis-catalysts; specific surface area of catalysts (single point determination), using; nitrogen adsorption by the continuous flow method, test