Synthesis and separation properties of B-ZSM-5 zeolite membranes on monolith supports

被引:45
作者
Kalipcilar, H [1 ]
Gade, SK [1 ]
Noble, RD [1 ]
Falconer, JL [1 ]
机构
[1] Univ Colorado, Dept Chem Engn, Boulder, CO 80309 USA
关键词
membrane preparation; B-ZSM-5; membrane; monolith support; gas separations;
D O I
10.1016/S0376-7388(02)00380-0
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Alumina-coated, silicon carbide monoliths were used as supports for B-ZSM-5 zeolite membranes, which were synthesized by in situ hydrothermal crystallization. Both 2 turn x 2 mm (66 channels) and 4 mm x 4 mm (22 channels) monoliths with effective membrane area/volume ratios of 10.6 and 7.2 cm(2)/cm(3), respectively, were used. The membranes separated C-4 and C-6 hydrocarbon isomer vapor mixtures with high selectivities. The selectivities and permeances were comparable to tubular ZSM-5 membranes for butane isomers. The highest ideal selectivities at 473 K were 34 for n-C4H10/i-C4H10 and 77 for H-2/i-C4H10. The highest n-C4H10/i-C4H10 separation selectivity was 35 at 373 K, and the highest n-hexane/2,2-dimethylbutane separation selectivity was 247 at 436 K. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:113 / 127
页数:15
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