Enhanced dry reforming toward hydrogen production over Ni/CeO2SiO2 via different catalyst synthesis routes
| Autor: | S. Sivasangar, Nurul Asikin-Mijan, Yun Hin Taufiq-Yap, Sudarno, S.M. Razali |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Carbon dioxide reforming Renewable Energy Sustainability and the Environment Catalyst support Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Methane 0104 chemical sciences Catalysis chemistry.chemical_compound Nickel Fuel Technology chemistry Chemical engineering 0210 nano-technology Ball mill Syngas Hydrogen production |
| Zdroj: | International Journal of Hydrogen Energy. 44:20738-20750 |
| ISSN: | 0360-3199 |
| Popis: | Dry reforming of methane to produce hydrogen-rich syngas is widely studied, where the productivity of the reaction is greatly dependent on the activity and stability of the catalyst. In this investigation, a binary catalyst support consisting of a SiO2 CeO2 combination was developed to produce an efficient catalyst support with high resistance to carbon deposition during the reaction. Four different preparation methods (deposition-precipitation, DP; impregnation, IMP; sol-gel, SG; and ball milling, BM) were used to synthesize SiO2 CeO2 supports, and 5 wt % nickel was added to the support via wet impregnation. The catalyst performance was recorded in the order: Ni/CS-DP ˃ Ni/CS-IMP ˃ Ni/CS-BM ˃ Ni/CS-SG at 800 °C for 10 h reaction with a CH4/CO2 feed-gas composition ratio of 1:1. Ni/CS-DP was seen to be the most promising catalyst, exhibiting H2 and CO selectivities of ∼95% and ∼73%, respectively, with a H2/CO ratio of >1:1, and maintaining 97% CH4 conversion up to 10 h of reaction with very low coke deposition. The superior catalytic performance of Ni/CS-DP was achieved as a result of the synergistic effects of high basicity and low reducibility, which was achieved via direct alteration during the preparation of the support. |
| Databáze: | OpenAIRE |
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