ASTM D4567 – Standard Test Method for Single-Point Determination of Specific Surface Area of Catalysts and Catalyst Carriers Using Nitrogen Adsorption by Continuous Flow Method
Description:
Significance and Use
5.1 This test method is useful for determining the specific surface area of catalysts and catalyst carriers for material specifications, manufacturing control, and research and development in the evaluation of catalysts.
Scope
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 m2 to 300 m2, where rapid surface area determinations are desired.
1.2 Because the single-point method uses an approximation of the BET equation, the multipoint BET method (Test Method D3663) is preferred to the single-point method as the multipoint BET method may be more accurate. However, the single-point method can be useful in production environments or where a quick evaluation of surface area is sufficient.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
ASTM D455