| Physisorption of hydrogen in A, X and ZSM-5 types of zeolites at moderately high pressures |
| X. M. Du; E. D. Wu
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| 2006
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| 发表期刊 | Chinese Journal of Chemical Physics
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| ISSN | 1003-7713
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| 卷号 | 19期号:5页码:457-462 |
| 摘要 | The hydrogen adsorption properties and uptake capacities of the A, X and ZSM-5 types of zeolites were investigated at temperatures of 77, 195 and 293 K and pressures up to 7 MPa, using a conventional volumetric adsorption apparatus. All hydrogen adsorption isotherms were basically type 1, but the maximum in isotherm, a unique feature of supercritical adsorption, was observed at high pressures of 2-5 MPa at 77 K. The isosteric heats of adsorption were determined from the isotherms and the factors that influence their variations were discussed. Different types of zeolites exhibited remarkably different hydrogen uptake, based on both the framework structure and the nature of the cations present. The highest gravimetric storage capacity of 2.55wt% was obtained for NaX-type zeolite at 4 MPa and 77 K. In CaA, NaX and ZSM-5 types of zeolites, hydrogen uptakes were proportional to the specific surface areas, which were associated with the available void volumes of the zeolites. A threshold in hydrogen adsorption observed in NaA and KA was attributed to a pore blocking effect by large cations in KA. A ratio of the kinetic diameter of adsorbate to the effective opening diameter of zeolite was used to judge the blocking effect for physisorption. |
| 部门归属 | chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;wu, ed (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;ewu@imr.ac.cn
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| 关键词 | Zeolite
Hydrogen Storage
Hydrogen Adsorption
Adsorption Isotherm
Gas-adsorption
Storage
Silicalite
Nitrogen
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| URL | 查看原文
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| WOS记录号 | WOS:000242001700017
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://ir.imr.ac.cn/handle/321006/34185
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| 专题 | 中国科学院金属研究所
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推荐引用方式
GB/T 7714 |
X. M. Du,E. D. Wu. Physisorption of hydrogen in A, X and ZSM-5 types of zeolites at moderately high pressures[J]. Chinese Journal of Chemical Physics,2006,19(5):457-462.
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| APA |
X. M. Du,&E. D. Wu.(2006).Physisorption of hydrogen in A, X and ZSM-5 types of zeolites at moderately high pressures.Chinese Journal of Chemical Physics,19(5),457-462.
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| MLA |
X. M. Du,et al."Physisorption of hydrogen in A, X and ZSM-5 types of zeolites at moderately high pressures".Chinese Journal of Chemical Physics 19.5(2006):457-462.
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