Characterization and selectivity for methane and carbon dioxide adsorption on the all-silica DD3R zeolite
Characterization and selectivity for methane and carbon dioxide adsorption on the all-silica DD3R zeolite
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DOI：
10.1016/j.micromeso.2006.05.018
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发表时间：
2007-01-05
影响因子：
5.2
通讯作者：
Yoshida, Shuichi
中科院分区：
文献类型：
--
作者：
Himeno, Shuji;Tomita, Toshihiro;Yoshida, Shuichi
本研究合成了Clathrasil Deca-dodecasil 3R （DD3R）分子筛。然后考察了全硅DD3R分子筛对二氧化碳和甲烷的吸附性能。纯组分吸附等温线在温度273-348 K和压力高达3mpa。根据布鲁诺尔分类，等温线遵循典型的i型形状。使用Langmuir和多站点Langmuir模型可以很好地描述它们。测定了各吸附剂的等容吸附热和亨利定律常数。对二氧化碳的选择性高于甲烷，表明全硅DD3R是一种有效的吸附剂或沸石膜材料，可以分离二氧化碳和甲烷气体混合物。(C) 2006爱思唯尔公司版权所有。
Clathrasil Deca-dodecasil 3R (DD3R) zeolite was synthesized in this study. Then, adsorption properties of carbon dioxide and methane were examined on the all-silica DD3R zeolite. Pure component adsorption isotherms are reported at temperatures of 273-348 K and pressures as high as 3 MPa. The isotherms follow a typical Type-I shape according to the Brunauer classification. They are well described using Langmuir and multi-site Langmuir models. Isosteric heats of adsorption and Henry's Law constants of all adsorbates were determined. High selectivity of adsorption for carbon dioxide over methane suggests that the all-silica DD3R is an effective adsorbent or zeolite membrane material that can separate carbon dioxide and methane gaseous mixtures. (C) 2006 Elsevier Inc. All rights reserved.