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Citation: XU Jun-Ke, REN Ke-Wei, WANG Xiao-Lei, ZHOU Wei, PAN Xiang-Min, MA Jian-Xin. Effect of La₂O₃ on Ni/γ-Al₂O₃ Catalyst for Biogas Reforming to Hydrogen[J]. Acta Physico-Chimica Sinica, ;2008, 24(09): 1568-1572. doi: 10.3866/PKU.WHXB20080907 shu

Effect of La₂O₃ on Ni/γ-Al₂O₃ Catalyst for Biogas Reforming to Hydrogen

1.
School of Environmental Science and Engineering, Tongji University, Shanghai 200092, P. R. China; Clean Energy Automotive Engineering Center, Tongji University, Shanghai 201804, P. R. China; School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China

Received Date: 26 March 2008
Available Online: 9 July 2008

Ni/γ-Al2O3 catalysts modified by La2O3 were prepared with incipient wetness impregnation and used in biogas reforming to hydrogen. The catalysts were characterized with XRD, H2-TPR, BET, and TEM, respectively, and the relationship between the performance and the structural properties of the catalysts was investigated. The biogas was simulated with CH4 and CO2, and the volume ratio of CH4/CO2 was 1. The results showed that the amount of La2O3 added was a key influence factor. The increment of La2O3 in γ-Al2O3 support strengthened the interaction between Ni and γ-Al2O3. Appropriate accession of La2O3 could improve the reducibility of catalysts, increase the dispersity of metallic Ni on support, suppress the sintering of metallic Ni particles and enhance the adsorption of CO2 on support during the reaction. As a result, the performance of catalyst, including resistance to coking, activity and stability, was improved significantly. However, excessive addition of La2O3 deteriorated the performance of catalyst. It was found that the best performance of catalyst could be reached at the addition of 6% (w) La2O3 in γ-Al2O3.
- Lanthanumoxide; Nickel; Alumina; Biogas reforming; Hydrogen production; Dispersity; Resistance to coking
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沈阳化工大学材料科学与工程学院沈阳 110142

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Effect of La2O3 on Ni/γ-Al2O3 Catalyst for Biogas Reforming to Hydrogen

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通讯作者: 陈斌, bchen63@163.com

Effect of La₂O₃ on Ni/γ-Al₂O₃ Catalyst for Biogas Reforming to Hydrogen