Selective adsorption of carbon dioxide over nitrogen on calcined synthetic hectorites with tailor-made porosity

被引:57
作者
Pawar, Radheshyam R. [1 ]
Patel, Hasmukh A. [1 ]
Sethia, Govind [1 ]
Bajaj, Hari C. [1 ]
机构
[1] Cent Salt & Marine Chem Res Inst, Council Sci & Ind Res CSIR, Discipline Inorgan Mat & Catalysis, Bhavnagar 364002, Gujarat, India
关键词
Synthetic hectorites; Adsorption; Carbon dioxide; Nitrogen; Selectivity; CO2; CAPTURE; OXYGEN; ARGON; CLAY; CRYSTALLIZATION; ZEOLITES; MINERALS;
D O I
10.1016/j.clay.2009.07.009
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Hectorites were synthesized using 1-butyl-3-methylimidazolium bromide, 1,3-didecyl-2-methylimidazolium chloride and 1-decyl-3-methylimidazolium chloride as synthesis directing agents at condensation temperature for 48 h. Calcinations of synthetic hectorites resulted mesoporous materials with pore diameters ranging from 3A to 5.5 nm. The pore diameters depended on the directing agent. Synthetic and calcined hectorites were characterized by powder X-ray diffraction. Adsorption properties of CO2 and N-2 on calcined hectorites were investigated by volumetric measurements. The adsorption capacity for CO2 and N-2 decreased with increasing pore diameter. The calcined hectorites showed very good selectivity for CO2 over N-2 at lower as well as higher partial pressure at 303 K. (C) 2009 Elsevier B.V. All rights reserved.
引用
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页码:109 / 113
页数:5
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