Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 140, Issue -, Pages 258-264Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2013.04.024
Keywords
Ruthenium; Nickel; Titania; Selective CO methanation; CO removal process
Funding
- New Energy and Industrial Technology Development Organization (NEDO)
- Ministry of Education, Culture, Sports, Science and Technology, Japan
- Grants-in-Aid for Scientific Research [13J05374] Funding Source: KAKEN
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The removal of CO from reformate streams by selective CO methanation was investigated over TiO2 supported Ru-Ni bimetallic and monometallic catalysts. The combination of Ru and Ni enhanced CO methanation at low temperatures. The introduction of Ni into Ru/TiO2 decreased the CO2 conversion rate at 260 degrees C from 10 to 7.3 mu mol min(-1) g(cat)(-1). The use of Ru and Ni, thus, expands the temperature range of selective CO methanation. Transmission electron microscopy and temperature programmed reduction by H-2 confirmed that Ru species were in close proximity to Ni species on Ru-Ni/TiO2, indicating a decrease in direct contact between Ru and TiO2. Fourier transform infrared spectroscopy techniques revealed that the decomposition of the formate species, formed during CO2 methanation, is slow over Ru-Ni/TiO2, in contrast to Ru/TiO2. (C) 2013 Elsevier B.V. All rights reserved.
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