Quynh Thi Phuong Bui Kim, Yongmin Hien Thi Bich Nguyen Nam, Suk Woo Han, Jong Hee Ham, Hyung Chul Kim, Jin Young Choi, Sun Hee Hong, Sung-An Yoon, Chang Won 2024-01-20T06:34:48Z 2024-01-20T06:34:48Z 2021-09-04 2015-07 1011-372X https://pubs.kist.re.kr/handle/201004/125310 Hydrogen production via steam reforming of a simulated biogas was achieved in a temperature range of 500-800 A degrees C over a plate-type Ni-Al catalyst. To enhance the catalytic activity of the Ni-Al catalyst, a pretreatment process involving pre-oxidation with sequential reduction was employed prior to the reforming reactions. The activated Ni-Al catalyst exhibited increased methane conversion depending on the pre-oxidation temperature. Studies using X-ray diffraction and scanning electron microscopy suggested that the catalyst surface was restructured upon pretreatment, ultimately improving the catalytic activity. To increase its catalytic stability, CeO2 was employed additionally as a structural promoter to prevent both Ni sintering and carbon deposition. The durability of the CeO2-coated Ni-Al catalyst was improved significantly, particularly upon addition of a parts per thousand yen2.8 wt% of CeO2, with ca. 75 % of CH4 conversions being achieved without deactivation over 100 h at 700 A degrees C. The influence of the pre-oxidation temperature, reforming temperature, and steam/CH4 ratio on reforming over a CeO2-Ni-Al catalyst was also elucidated. In addition, the potential roles of CeO2 in the enhancement of activity and stability were discussed. [GRAPHICS] . English SPRINGER HYDROGEN-PRODUCTION FUEL-CELLS METHANE OXIDE SURFACES Steam Reforming of Biogas over CeO2-Coated Ni-Al Plate Catalysts Article 10.1007/s10562-015-1532-5 1 CATALYSIS LETTERS, v.145, no.7, pp.1403 - 1412 CATALYSIS LETTERS 145 7 1403 1412 scie scopus 000357481900006 2-s2.0-84947030952 Chemistry, Physical Chemistry Article HYDROGEN-PRODUCTION FUEL-CELLS METHANE OXIDE SURFACES Heterogeneous catalysis Green chemistry Fuel cell CO2 Reforming Biogas