TY - JOUR
T1 - Tubular dual-layer MFI zeolite membrane reactor for hydrogen production via the WGS reaction
T2 - Experimental and modeling studies
AU - Dong, Xueliang
AU - Wang, Haibing
AU - Rui, Zebao
AU - Lin, Jerry
N1 - Funding Information:
The authors would like to acknowledge the support of the U.S. Department of Energy ( DE-PS36-03GO93007 ) for this project. We would also like to acknowledge Prof. Panagiotis Smirniotis at University of Cincinnati for providing the catalyst used for water–gas shift reaction in this work.
Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015
Y1 - 2015
N2 - Water-gas shift (WGS) reaction is an important intermediate step in converting fossil fuels to hydrogen (H2) for chemical production or power generation. Catalytic membrane reactor with a H2 perm-selective membrane can improve WGS reaction conversion and separate H2 from carbon dioxide (CO2) simultaneously. In this work, experimental work and modeling analysis were performed on WGS in a tubular ZSM-5/silicalite bilayer membrane composed of a 3μm ZSM-5 layer, a 8μm silicalite base layer and a 2μm YSZ barrier layer supported on α-alumina substrate. The experimental and modeling studies demonstrated that temperature, H2O/CO ratio, gas hourly space velocity (GHSV) and feed pressure are key factors that determine the WGS performance in the tubular zeolite membrane reactor. At 500°C and under 5atm with the H2O/CO ratio of 3.0 and GHSV of 72,000h-1, the CO conversion and H2 recovery reached 89.8% and 28.5%, respectively. Appropriate temperature, pressure, H2O/CO ratio and GHSV are crucial to obtain high reaction performance. Modeling analysis coupled with experimental data identifies the optimum operation conditions (550°C, feed pressure of 20atm, H2O/CO ratio of 2.0, GHSV of 60,000h-1) under which one can achieve both high CO conversion (>95%) and H2 recovery (>90%) for WGS in this zeolite membrane reactor.
AB - Water-gas shift (WGS) reaction is an important intermediate step in converting fossil fuels to hydrogen (H2) for chemical production or power generation. Catalytic membrane reactor with a H2 perm-selective membrane can improve WGS reaction conversion and separate H2 from carbon dioxide (CO2) simultaneously. In this work, experimental work and modeling analysis were performed on WGS in a tubular ZSM-5/silicalite bilayer membrane composed of a 3μm ZSM-5 layer, a 8μm silicalite base layer and a 2μm YSZ barrier layer supported on α-alumina substrate. The experimental and modeling studies demonstrated that temperature, H2O/CO ratio, gas hourly space velocity (GHSV) and feed pressure are key factors that determine the WGS performance in the tubular zeolite membrane reactor. At 500°C and under 5atm with the H2O/CO ratio of 3.0 and GHSV of 72,000h-1, the CO conversion and H2 recovery reached 89.8% and 28.5%, respectively. Appropriate temperature, pressure, H2O/CO ratio and GHSV are crucial to obtain high reaction performance. Modeling analysis coupled with experimental data identifies the optimum operation conditions (550°C, feed pressure of 20atm, H2O/CO ratio of 2.0, GHSV of 60,000h-1) under which one can achieve both high CO conversion (>95%) and H2 recovery (>90%) for WGS in this zeolite membrane reactor.
KW - Hydrogen separation
KW - Modeling
KW - Tubular membranes
KW - Water-gas shift
KW - Zeolite membranes
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U2 - 10.1016/j.cej.2015.01.046
DO - 10.1016/j.cej.2015.01.046
M3 - Article
AN - SCOPUS:84961718060
SN - 1385-8947
VL - 268
SP - 219
EP - 229
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
ER -