Adsorption of hydrogen on porous materials of activated carbon and zeolite NaX crossover critical temperature
文献类型：期刊论文
| 作者 | J. Li ; E. D. Wu |
| 刊名 | Journal of Supercritical Fluids
 |
| 出版日期 | 2009 |
| 卷号 | 49期号:2页码:196-202 |
| 关键词 | Hydrogen adsorption isotherm Activated carbon Zeolite Nax Critical temperature Compressibility factor high-pressure adsorption supercritical hydrogen neutron-diffraction confined phases critical-point storage physisorption isotherms capacity behavior |
| ISSN号 | 0896-8446 |
| 中文摘要 | Hydrogen adsorption properties of typical porous materials, activated carbon and zeolite NaX, are studied through isotherm measurements at pressure up to 7 MPa crossover the critical temperature. The Soave-Redlich-Kwong equation of state is selected for calculation of compressibility factor of hydrogen. The two adsorbents exhibit remarkably different hydrogen uptake capacities. which are attributed to their framework structures and porous surfaces. At near critical temperatures, significant drops and recoveries of excess adsorption are observed on the isotherms. The multilayer adsorption and associated reduced density and increased volume of the adsorbed phase are derived from the extents of adsorption drops. The recovery is attributed to the bias of compressibility factor from the assumed equation of state. The negative adsorption is observed at subcritical temperature, and explained by the conception of pore critical temperature and relevant calculation. The isosteric heats of adsorption are determined as 2.1 kJ/mol for activated carbon and 4.4 kJ/mol for NaX, respectively. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/32021]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | J. Li,E. D. Wu. Adsorption of hydrogen on porous materials of activated carbon and zeolite NaX crossover critical temperature[J]. Journal of Supercritical Fluids,2009,49(2):196-202. |
| APA | J. Li,&E. D. Wu.(2009).Adsorption of hydrogen on porous materials of activated carbon and zeolite NaX crossover critical temperature.Journal of Supercritical Fluids,49(2),196-202. |
| MLA | J. Li,et al."Adsorption of hydrogen on porous materials of activated carbon and zeolite NaX crossover critical temperature".Journal of Supercritical Fluids 49.2(2009):196-202. |
入库方式： OAI收割
来源：金属研究所
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