Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/105324
Title: Poisoning effects of H2S and HCl on the naphthalene steam reforming and water-gas shift activities of Ni and Fe catalysts
Authors: Dou, Xiaomin
Veksha, Andrei
Chan, Wei Ping
Oh, Wen-Da
Liang, Yen Nan
Teoh, Florence
Giannis, Apostolos
Lisak, Grzegorz
Lim, Teik-Thye
Dara Khairunnisa Binte Mohamed
Keywords: Hydrogen Chloride
Hydrogen Sulfide
Engineering::Civil engineering
Issue Date: 2019
Source: Dou, X., Veksha, A., Chan, W. P., Oh, W.-D., Liang, Y. N., Teoh, F., . . . Lim, T.-T. (2019). Poisoning effects of H2S and HCl on the naphthalene steam reforming and water-gas shift activities of Ni and Fe catalysts. Fuel, 241, 1008-1018. doi:10.1016/j.fuel.2018.12.119
Series/Report no.: Fuel
Abstract: H2S and HCl are common impurities in raw syngas produced during gasification of biomass and municipal solid waste. The purpose of this study was to investigate the poisoning effect of H2S and HCl on synthesized and commercial catalysts during steam reforming of naphthalene. Four synthesized catalysts with different loadings of Ni and Fe on alumina support and two commercial catalysts were selected and evaluated in a fixed bed reactor at 790, 850 and 900 °C. The obtained results revealed that reforming and water-gas shift (WGS) activities of catalysts did not benefit from the Fe addition. The activities were influenced differently by H2S and HCl indicating that the reactions were catalyzed by different active sites on the nickel surface. In the presence of H2S and HCl, the poisoning of naphthalene reforming activity was caused by H2S and was not affected by HCl when both compounds were present in the gas. H2S chemisorbs on nickel surface forming NiS and decreasing the accessibility of active sites to hydrocarbons. The poisoning effect was only partially reversible. On the contrary, the poisoning of WGS activity could be caused by both H2S and HCl, and the activity could be completely restored when H2S and HCl were removed from the gas. Unlike naphthalene reforming activity, which was comparable for catalysts with similar Ni loadings, WGS activity depended on the catalyst structure and was less susceptible to poisoning by H2S and HCl in case of the catalyst with strong NiO-support interactions.
URI: https://hdl.handle.net/10356/105324
http://hdl.handle.net/10220/49530
ISSN: 0016-2361
DOI: 10.1016/j.fuel.2018.12.119
Rights: © 2018 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/BY/4.0/).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles

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