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ASTM D4222-20
2020
Standard Test Method for Determination of Nitrogen Adsorption and Desorption Isotherms of Catalysts and Catalyst Carriers by Static Volumetric Measurements
- Format:
- Language(s) :
- Published :
- English
- 10/01/2020
1.1 This test method covers the determination of nitrogen adsorption and desorption isotherms of catalysts and catalyst carriers at the boiling point of liquid nitrogen.2 A static volumetric measuring system is used to obtain sufficient equilibrium adsorption points on each branch of the isotherm to adequately define the adsorption and desorption branches of the isotherm. Thirty points evenly spread over the isotherm is considered to be the minimum number of points that will adequately define the isotherm.
1.2 Units-The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
| ASTM D4222-20 | |
|---|---|
| STANDARD INFO: | |
| Standard Name | ASTM D4222-20 |
| Scope | Standard Test Method for Determination of Nitrogen Adsorption and Desorption Isotherms of Catalysts and Catalyst Carriers by Static Volumetric Measurements |
| Publisher | ASTM - ASTM International |
| Languages | English |
| State | |
| Publication Year | 2020 |
| Most recent Version | MOST RECENT |
| Whether to be replaced | |
| Addendum | |
| FILE INFO: | |
| File Size | 1 file , 140 KB |
| Note | This product is unavailable in Russia, Ukraine, Belarus |
| Number of Pages | 6 |
| Published | 10/01/2020 |
| Redline File Size | 2 files , 300 KB |
| ASTM D4222-20 | ||
|---|---|---|
| History | Publisher Year | |
| ASTM D4222-20 | 2020 | Current |
| ASTM D4222-03(2015)e1 | 2015 | |
| ASTM D4222-03(2008) | 2008 | |
| ASTM D4222-03 | 2003 | |
| ASTM D4222-98 | 1998 |
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