TY - JOUR
T1 - Mesoporous-molecular-sieve-supported polymer sorbents for removing H 2S from hydrogen gas streams
AU - Wang, Xiaoxing
AU - Ma, Xiaoliang
AU - Xu, Xiaochun
AU - Sun, Lu
AU - Song, Chunshun
N1 - Funding Information:
Acknowledgements The authors gratefully acknowledge the financial support from the Pennsylvania Energy Development Authority, Department of Environmental Protection, Pennsylvania State through Grant PG050021. The authors wish to thank Dr. Alan W Scaroni for helpful discussions.
PY - 2008/7
Y1 - 2008/7
N2 - A series of sorbents with a linear polyethylenimine (PEI) supported on the mesoporous molecular sieves, including MCM-41, MCM-48 and SBA-15, have been prepared and used to remove H2S from a model gas containing 0.40 v% of H2S and 20 v% H2 in N2 gas. The sorption was conducted in a fixed-bed system at a temperature range of 22-75 °C, a GHSV range of 337-1,011 h-1 and atmospheric pressure. The effects of the operating temperature, GHSV, the amount of PEI loading and the different molecular sieve supports were studied. A reduction in the temperature and GHSV improves the sorption performance of the supported PEI sorbents. A synergetic effect of the SBA-15 support and PEI on the H2S sorption performance was observed. Loading 50 wt% PEI on SBA-15 gave the best breakthrough capacity, while loading 65 wt% PEI on SBA-15 had the highest saturation capacity. The mesoporous molecular sieve with large pore size and three-dimensional channel structure favors increasing the kinetic capacity of the supported PEI sorbent. In addition, the developed sorbents can be regenerated easily at mild conditions (temperature range of 75-100 °C) and have excellent regenerability and stability. The results indicate that the mesoporous-molecular-sieve-supported polymer sorbents are promising for removing H2S from hydrogen gas streams.
AB - A series of sorbents with a linear polyethylenimine (PEI) supported on the mesoporous molecular sieves, including MCM-41, MCM-48 and SBA-15, have been prepared and used to remove H2S from a model gas containing 0.40 v% of H2S and 20 v% H2 in N2 gas. The sorption was conducted in a fixed-bed system at a temperature range of 22-75 °C, a GHSV range of 337-1,011 h-1 and atmospheric pressure. The effects of the operating temperature, GHSV, the amount of PEI loading and the different molecular sieve supports were studied. A reduction in the temperature and GHSV improves the sorption performance of the supported PEI sorbents. A synergetic effect of the SBA-15 support and PEI on the H2S sorption performance was observed. Loading 50 wt% PEI on SBA-15 gave the best breakthrough capacity, while loading 65 wt% PEI on SBA-15 had the highest saturation capacity. The mesoporous molecular sieve with large pore size and three-dimensional channel structure favors increasing the kinetic capacity of the supported PEI sorbent. In addition, the developed sorbents can be regenerated easily at mild conditions (temperature range of 75-100 °C) and have excellent regenerability and stability. The results indicate that the mesoporous-molecular-sieve-supported polymer sorbents are promising for removing H2S from hydrogen gas streams.
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U2 - 10.1007/s11244-008-9072-5
DO - 10.1007/s11244-008-9072-5
M3 - Article
AN - SCOPUS:48949120307
SN - 1022-5528
VL - 49
SP - 108
EP - 117
JO - Topics in Catalysis
JF - Topics in Catalysis
IS - 1-2
ER -