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Mesoporous-molecular-sieve-supported Polymer Sorbents for Removing H2S from Hydrogen Gas Streams

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Abstract

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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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.

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Authors and Affiliations

  1. Clean Fuels and Catalysis Program, EMS Energy Institute and Department of Energy & Mineral Engineering, The Pennsylvania State University, 209 Academic Projects Building, University Park, PA, 16802, USA

    Xiaoxing Wang, Xiaoliang Ma, Xiaochun Xu, Lu Sun & Chunshun Song

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  1. Xiaoxing Wang
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  2. Xiaoliang Ma
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  3. Xiaochun Xu
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  4. Lu Sun
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  5. Chunshun Song
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Correspondence to Chunshun Song.

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Wang, X., Ma, X., Xu, X. et al. Mesoporous-molecular-sieve-supported Polymer Sorbents for Removing H2S from Hydrogen Gas Streams. Top Catal 49, 108–117 (2008). https://doi.org/10.1007/s11244-008-9072-5

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