TY - CONF
T1 - Studies on catalysts for preferential oxidation of CO in H2-rich gas mixture
AU - Al-Ghamdi, Musaed S.
AU - Ahmed, Shakeel
AU - Al-Shalabi, Mazin A.
AU - Inui, Tomoyuki
PY - 2006
Y1 - 2006
N2 - In this work, Cu-Ce/γ-Al2O3 as a base catalyst promoted with Pt and Rh was prepared for the low temperature selective oxidation of CO in hydrogen rich syn gas mixture. Catalysts with atomic ratio of 100: 20: 3: 1 for Cu: Ce2O3: Pt: Rh were prepared with Cu loading in the range of 0.5 to 6%. The effects of Pt and Rh addition on the base catalyst, stoichiometric ratio of O2/CO, and water vapor on the selective oxidation of CO as a function of temperature were investigated. BT surface area and pore volume measurement showed slight decreases in surface area and pore volume with increasing metal loadings. The TPR results indicate shift towards higher temperature when Pt and Rh were added to Cu-Ce/γ-Al 2O3 catalyst The loading of Cu, Ce, Pt, and Rh metals for maximum activity and selectivity were 2.0, 0.657, 0.183, 0.0324 wt % respectively which decreased CO concentration in the product to 4ppm (99.96%). A synergistic effect addition of Pt and/or Rh was observed as an enhancement of the activity and selectivity of the base catalyst (Cu-Ce/γ-Al 2O3). The CO conversion was increased from 24.7 to 96.77% with addition of 0.183 wt% Pt and from 24.7 to 44.1% with 0.0324 wt% Rh to the base catalyst. Addition 10 vol% of water vapor to the feed resulted in higher conversion at lower temperature. Both CO conversion and temperature of maximum conversion were reduced when water vapor content in the feed was increased to 20 vol%.
AB - In this work, Cu-Ce/γ-Al2O3 as a base catalyst promoted with Pt and Rh was prepared for the low temperature selective oxidation of CO in hydrogen rich syn gas mixture. Catalysts with atomic ratio of 100: 20: 3: 1 for Cu: Ce2O3: Pt: Rh were prepared with Cu loading in the range of 0.5 to 6%. The effects of Pt and Rh addition on the base catalyst, stoichiometric ratio of O2/CO, and water vapor on the selective oxidation of CO as a function of temperature were investigated. BT surface area and pore volume measurement showed slight decreases in surface area and pore volume with increasing metal loadings. The TPR results indicate shift towards higher temperature when Pt and Rh were added to Cu-Ce/γ-Al 2O3 catalyst The loading of Cu, Ce, Pt, and Rh metals for maximum activity and selectivity were 2.0, 0.657, 0.183, 0.0324 wt % respectively which decreased CO concentration in the product to 4ppm (99.96%). A synergistic effect addition of Pt and/or Rh was observed as an enhancement of the activity and selectivity of the base catalyst (Cu-Ce/γ-Al 2O3). The CO conversion was increased from 24.7 to 96.77% with addition of 0.183 wt% Pt and from 24.7 to 44.1% with 0.0324 wt% Rh to the base catalyst. Addition 10 vol% of water vapor to the feed resulted in higher conversion at lower temperature. Both CO conversion and temperature of maximum conversion were reduced when water vapor content in the feed was increased to 20 vol%.
UR - https://www.scopus.com/pages/publications/33846992692
M3 - Paper
AN - SCOPUS:33846992692
SP - 91
EP - 100
ER -