Investigation on Co–Modified NixMgyO Solid Solutions for Hydrogen Production from Steam Reforming of Acetic Acid and a Model Blend

Xiang Luo, Yu Hong, Kaiqi Shi, Gang Yang, Chengheng Pang, Edward Lester, Lei Jiang, Tao Wu

Research output: Journal PublicationArticlepeer-review

1 Citation (Scopus)
3 Downloads (Pure)

Abstract

This paper is focused on the Co-modified NixMgyO solid solutions (10 wt% Ni, 2–6 wt% 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 = 2 wt%) 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 ≥ 4 wt%) 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.

Original languageEnglish
Pages (from-to)9829-9835
Number of pages7
JournalChemistrySelect
Volume4
Issue number33
DOIs
Publication statusPublished - 6 Sep 2019

Keywords

  • Acetic acid
  • Co-modified catalyst
  • Hydrogen production
  • Steam reforming
  • Water-gas shift reaction

ASJC Scopus subject areas

  • Chemistry (all)

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