Carbon molecular sieve membranes for hydrogen purification from a steam methane reforming process

被引:70
作者
Lei, Linfeng [1 ]
Lindbrathen, Arne [1 ]
Hillestad, Magne [1 ]
He, Xuezhong [2 ,3 ]
机构
[1] Norwegian Univ Sci & Technol, Dept Chem Engn, NO-7491 Trondheim, Norway
[2] Guangdong Technion Israel Inst Technol GTIIT, Dept Chem Engn, 241 Daxue Rd, Shantou 515063, Peoples R China
[3] Technion Israel Inst Technol, Wolfson Dept Chem Engn, IL-32000 Haifa, Israel
关键词
Carbon molecular sieve membranes; Hydrogen purification; Steam methane reforming; Process simulation; Gas separation;
D O I
10.1016/j.memsci.2021.119241
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Asymmetric carbon molecular sieve (CMS) membranes prepared from cellulose hollow fiber precursors were investigated for H2/CO2 separation in this work. The prepared carbon membrane shows excellent separation performance with H2 permeance of 111 GPU and an H2/CO2 selectivity of 36.9 at 10 bar and 110 ?C dry mixed gas. This membrane demonstrates high stability under a humidified gas condition at 90 ?C and the pressure of up to 14 bar. A two-stage carbon membrane system was evaluated to be techno-economically feasible to produce high-purity H2 (>99.5 vol%) by HYSYS simulation, and the minimum specific H2 purification cost of 0.012 $/Nm3 H2 produced was achieved under the optimal operating condition. Sensitivity analysis on the H2 loss and H2 purity indicates that such membrane is still less cost-effective to achieve ultrapure hydrogen (e.g., >99.8 vol %) unless the higher operating temperatures for carbon membrane systems are applied.
引用
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页数:10
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