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Scope

1.1 This test method covers a procedure for determination of the relative crystallinity of zeolite ZSM-5 using selected peaks from the X-ray diffraction pattern of the zeolite.

1.2 The test method provides a number that is the ratio of intensity of a portion of the XRD pattern of the sample ZSM-5 to intensity of the corresponding portion of the pattern of a reference ZSM-5. The intensity ratio, expressed as a percentage, is then labeled percent XRD relative crystallinity/ZSM-5. This type of comparison is commonly used in zeolite technology and is often referred to as percent crystallinity.

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.

Keywords

crystallinity; X-ray diffraction; zeolite ZSM-; ICS Number Code 71.040.50 (Physicochemical methods of analysis)

To find similar documents by ASTM Volume:

05.05 (Combustion Characteristics; Manufactured Carbon and Graphite Products; Catalysts)

05.06 (Gaseous Fuels; Coal and Coke)

To find similar documents by classification:

71.040.50 (Physicochemical methods of analysis Including spectrophotometric and chromatographic analysis)

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