Investigation on Co–Modified NixMgyO solid solutions for hydrogen production from steam reforming of acetic acid and a model blendTools Luo, Xiang, Hong, Yu, Shi, Kaiqi, Yang, Gang, Pang, Chengheng, Lester, Edward, Jiang, Lei and Wu, Tao (2019) Investigation on Co–Modified NixMgyO solid solutions for hydrogen production from steam reforming of acetic acid and a model blend. ChemistrySelect, 4 (33). pp. 9829-9835. ISSN 2365-6549
Official URL: http://dx.doi.org/10.1002/slct.201900687
AbstractThis paper is focused on the Co-modified NixMgyO solid solutions (10wt% Ni, 2-6wt% Co) for the steam reforming of acetic acid and a model blend. The pristine rocksalt structured NixMgyO solid solution and the modified NixMgyO-Co catalysts were synthesized via hydrothermal method and co-impregnation. The activity of the catalysts was evaluated in the temperature range of 500-800 °C with a steam/carbon molar ratio of 3 and a gas hourly space velocity (GHSV) of 57,000 h-1. Low cobalt content (Co loading = 2wt%) catalysts exhibited significant promotion of H2 yield via enhancement of both water-gas shift (WGS) reaction and methane decomposition. A 30-hour test at 700 °C achieved excellent acetic acid conversion rate and H2 yield of 99.1% and 86.9%, respectively. However, the catalysts with higher cobalt loading (Co loading ≥ 4wt%) suffered a much quicker deactivation mainly due to carbon deposition. In addition, the catalysts were also tested on a model blend combined acids, alcohols and aromatic species and exhibited outstanding performance with carbon conversion above 90% and H2 yield above 70% for 100 h.
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