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Title: Effects of modifier (Gd, Sc, La) addition on the stability of low Ni content catalyst for dry reforming of model biogas
Authors: Quan Luu Manh Ha
Atia, Hanan
Kreyenschulte, Carsten
Lund, Henrik
Bartling, Stephan
Lisak, Grzegorz
Wohlrab, Sebastian
Armbruster, Udo
Keywords: Engineering::Chemical engineering
Issue Date: 2022
Source: Quan Luu Manh Ha, Atia, H., Kreyenschulte, C., Lund, H., Bartling, S., Lisak, G., Wohlrab, S. & Armbruster, U. (2022). Effects of modifier (Gd, Sc, La) addition on the stability of low Ni content catalyst for dry reforming of model biogas. Fuel, 312, 122823-.
Journal: Fuel 
Abstract: Biogas consists of a larger part of methane and a smaller part of carbon dioxide. Reforming biogas is highly desirable due to the direct conversion of the two components, yet not possible due to the current state of catalyst development. For such dry reforming of methane-rich gases (CH4/CO2 = 2) we now present catalysts with low Ni loading (2.5 wt%) modified with Gd, Sc, or La. The best catalyst reaches 49% CH4 conversion and 95% CO2 conversion at 750 °C. The La-modification only shows limited influence on coking and protection against catalyst deactivation although this catalyst exposed highest basicity. On the other side, Sc- and especially Gd-modified catalysts exposed stronger metal-support interaction and thus enhanced stabilization of fine Ni particles during the reaction, which is critical to preserve high performance in CH4-rich DRM. This suppressed carbon deposition and the growth of structured carbon as evidenced by STEM images and TPO of spent catalysts. In this way, exceptionally high specific H2 productivity (94 l/(gcat·h)) compared to literature was obtained on Gd-modified catalyst, and, most noteworthy, after extending the time on stream from 8 to 100 h the amount of deposited coke increased only from 3 to 4 wt%.
ISSN: 0016-2361
DOI: 10.1016/j.fuel.2021.122823
Schools: School of Civil and Environmental Engineering 
Organisations: Leibniz Institute for Catalysis, Germany
Research Centres: Nanyang Environment and Water Research Institute 
Residues and Resource Reclamation Centre 
Rights: © 2021 Elsevier Ltd.. All rights reserved. This paper was published in Fuel and is made available with permission of Elsevier Ltd.
Fulltext Permission: embargo_20240322
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles
NEWRI Journal Articles

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