Porous materials from clays by the gallery template approach: synthesis, characterization and adsorption properties
Porous materials from clays by the gallery template approach: synthesis, characterization and adsorption properties
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DOI：
10.1016/j.micromeso.2004.05.009
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发表时间：
2004-09
影响因子：
5.2
通讯作者：
J. Pires;A. Araújo;A. Carvalho;M. Pinto;J. González-Calbet;J. Ramírez-Castellanos
中科院分区：
文献类型：
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作者：
J. Pires;A. Araújo;A. Carvalho;M. Pinto;J. González-Calbet;J. Ramírez-Castellanos
以粘土为原料，采用廊道模板法合成多孔材料。样品的等效表面积在600-700 m2 g-1范围内，相应的微孔体积接近0.3 cm 3 g-1。HRTEM证实了所制备的样品缺乏长程有序。低温氮吸附显示样品中的质地差异，即合成中使用的不同链长的中性胺所产生的那些。通过对乙醇、甲乙酮和水的吸附对比，研究了此类材料作为挥发性有机物吸附剂的可能性。它们作为吸附剂用于纯化甲烷的潜在用途，例如，用于天然气或填埋气的提质，也通过测定二氧化碳、乙烷、甲烷和氮气的室温吸附等温线进行了研究，其中获得了甲烷/二氧化碳分离的高初始选择性值。
Porous materials were obtained from clays by gallery templated synthesis. The equivalent surface areas of the samples were in the range 600–700 m2g−1and the corresponding microporous volumes were near 0.3 cm3g−1. HRTEM confirmed the lack of long-range order of the prepared samples. Low temperature nitrogen adsorption showed textural differences in the samples, namely those arising from the neutral amines of different chain length used in synthesis. The possibility of using such materials as adsorbents of volatile organic compounds, due to their textural and hydrophobic characteristics, was studied by the adsorption of ethanol and methyl ethyl ketone and water for comparison. Their potential use as adsorbents for the purification of methane, e.g., for upgrading natural or landfill gas, was also studied by the determination of the room temperature adsorption isotherms of carbon dioxide, ethane, methane and nitrogen, where high initial selectivity values were obtained for the methane/carbon dioxide separation.