Effect of Oxidants on Syngas Synthesis from Biogas over 3 wt % Ni-Ce-MgO-ZrO 2 /Al 2 O 3 Catalyst

Danbee Han, Yunji Kim, Wonjun Cho and Youngsoon Baek
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Danbee Han: Department of Environmental and Energy Engineering, University of Suwon, Hwaseong-si 18323, Korea
Yunji Kim: Department of Environmental and Energy Engineering, University of Suwon, Hwaseong-si 18323, Korea
Wonjun Cho: Bio Friends Inc., Yuseong-gu, Daejeon 34028, Korea
Youngsoon Baek: Department of Environmental and Energy Engineering, University of Suwon, Hwaseong-si 18323, Korea

Energies, 2020, vol. 13, issue 2, 1-14

Abstract: The utilization of fossil fuels has led to a gradual increase in greenhouse gas emissions, which have accelerated global climate change. Therefore, there is a growing interest in renewable energy sources and technologies. Biogas has gained considerable attention as an abundant renewable energy resource. Common biogases include anaerobic digestion gas and landfill gas, which can be used to synthesize high-value-added syngas through catalytic reforming. Because syngas (CO and H 2 ) is synthesized at high reaction temperature, carbon is generated by the Boudouard reaction from CO and CH 4 cracking; thus, C blocks the pores and surface of the catalyst, thereby causing catalyst deactivation. In this study, a simulation was performed to measure the CH 4 and CO 2 conversion rates and the syngas yield for different ratios of CO 2 /CH 4 (0.5, 1, and 2). The simulation results showed that the optimum CO 2 /CH 4 ratio is 0.5; therefore, biogas reforming over the 3 wt% Ni/Ce-MgO-ZrO 2 /Al 2 O 3 catalyst was performed under these conditions. CH 4 and CO 2 conversion rates and the syngas yield were evaluated by varying the R values ( R = (CO 2 + O 2 )/CH 4 ) on the effect of CO 2 and O 2 oxidants of CH 4 . In addition, steam was added during biogas reforming to elucidate the effect of steam addition on CO 2 and CH 4 conversion rates. The durability and activity of the catalyst after 200-h biogas reforming were evaluated under the optimal conditions of R = 0.7, 850 °C, and 1 atm.

Keywords: biogas; reforming; syngas synthesis; Ni catalysts; carbon dioxide (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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