Low temperature water-gas shift reaction on Au-CeO2/Al 2O3 catalysts
International Journal of Chemical Reactor Engineering, cilt.8, 2010 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 8
- Basım Tarihi: 2010
- Doi Numarası: 10.2202/1542-6580.2424
- Dergi Adı: International Journal of Chemical Reactor Engineering
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Anahtar Kelimeler: fuel cells, hydrogen production, water-gas shift reaction
- Boğaziçi Üniversitesi Adresli: Evet
Özet
The low temperature water gas shift activities of Au-CeO 2/Al2O3 catalysts were studied in this work. The catalysts were prepared by impregnation of CeO2 on alumina support followed by the homogeneous deposition precipitation of Au on CeO 2/Al2O3. The catalysts were tested in a microflow reaction system. It was found that the activity of the catalyst increased with increasing Ce loading from 2.5 wt.% to 10 wt.% significantly while the increase in the activity was minor with the further increase of the ceria to 20 wt.%. The increasing Au content from 1 wt.% to 3 wt.% inversely affected the activity but the conversion increased with increasing Au to 5 wt.%. It was observed that the activity of 5wt.%Au/20wt.%Ce/Al2O 3 decreased with increasing CO concentration. On the other hand, the CO conversion was increased with increasing H2O in the feed (significantly up to 10% H2O and then slightly after that). The 15% CO2 in the feed decreased catalytic activity slightly while the negative effect of 60% H2 was more dramatic. The presence of both CO2 and H2 in the feed together resulted the lowest conversion as expected. © 2010 The Berkeley Electronic Press. All rights reserved.