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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Hydrogen adsorption in zeolites A, X, Y and RHO
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Hydrogen adsorption in zeolites A, X, Y and RHO

机译：氢在A，X，Y和RHO沸石中的吸附

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摘要

We have investigated the use of zeolites as potential hydrogen storage materials. The zeolites A, X, Y and RHO, which encompass a range of different pore geometries and compositions, were synthesised by hydrothermal methods, and different cation-exchanged forms were prepared through ion-exchange from aqueous metal nitrate solutions. The phase composition and crystallinity of samples were interrogated by powder X-ray diffraction. Scanning electron microscopy revealed cubic crystals of zeolites both before and after ion-exchange. Hydrogen adsorption capacities were measured using a constant pressure Thermogravimetric Analyser; data were obtained over a range of pressures from 0 to 15 bar and isothermally at temperatures from -196 to 300 deg C. The results showed that hydrogen uptake in zeolites is strongly dependent upon temperature, and also on framework and cation type. Surface area measurements were also carried out on these materials and the results used to interpret the hydrogen adsorption data.
机译：我们已经研究了使用沸石作为潜在的储氢材料。通过水热法合成了A，X，Y和RHO沸石，它们涵盖了一系列不同的孔几何形状和组成，并通过从金属硝酸盐水溶液中进行离子交换制备了不同的阳离子交换形式。通过粉末X射线衍射对样品的相组成和结晶度进行询问。扫描电子显微镜揭示了离子交换前后沸石的立方晶体。使用恒压热重分析仪测量氢的吸附能力。数据是在0至15巴的压力范围内和-196至300摄氏度的温度下等温获得的。结果表明，沸石中的氢吸收强烈依赖于温度，还取决于骨架和阳离子类型。还对这些材料进行了表面积测量，并将结果用于解释氢吸附数据。

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