Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/159577
Title: Unravelling the significance of catalyst reduction stage for high tar reforming activity in the presence of syngas impurities
Authors: Dara Khairunnisa Mohamed
Veksha, Andrei
Quan Luu Manh Ha
Lim, Teik-Thye
Lisak, Grzegorz
Keywords: Engineering::Chemical engineering
Issue Date: 2022
Source: Dara Khairunnisa Mohamed, Veksha, A., Quan Luu Manh Ha, Lim, T. & Lisak, G. (2022). Unravelling the significance of catalyst reduction stage for high tar reforming activity in the presence of syngas impurities. Applied Catalysis A: General, 642, 118711-. https://dx.doi.org/10.1016/j.apcata.2022.118711
Journal: Applied Catalysis A: General 
Abstract: Ni catalysts are used widely in tar reforming for syngas purification. This study investigates the aim of the reduction stage toward Ni catalysts during tar reforming in the presence of syngas impurities. A NiAl2O4 catalyst was used for the reforming of a mixture of tar model compounds (naphthalene, toluene, and styrene) in simulated syngas containing 50 ppmv H2S and 500 ppmv HCl. The catalyst exhibited activity in tar reforming even without the pre-reduction treatment, but it was deactivated rapidly due to the favored reaction between H2S and Ni2+ species, causing increased Ni agglomeration and carbon deposition. Pre-reduction of catalysts enhanced the catalyst stability even in the presence of syngas impurities. Higher reforming activity was achieved by increasing the reduction temperature from 800 °C to 900 °C. However, transformation in the support structure at higher reducing temperature could lead to decreased exposure of Ni due to the collapse of pore structures.
URI: https://hdl.handle.net/10356/159577
ISSN: 0926-860X
DOI: 10.1016/j.apcata.2022.118711
Rights: © 2022 Elsevier B.V. All rights reserved. This paper was published in Applied Catalysis A: General and is made available with permission of Elsevier B.V.
Fulltext Permission: embargo_20240802
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles
IGS Journal Articles
NEWRI Journal Articles

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