Catalytic reforming of synthetic biogas for hydrogen enrichment over Ni supported on ZnO CeO2 mixed catalyst
| Autor: | Amit Dhir, Pali Rosha, Sunil Kumar Mahla, Saroj Kumar Mohapatra |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Carbon dioxide reforming
Hydrogen Renewable Energy Sustainability and the Environment Chemistry 020209 energy chemistry.chemical_element Forestry 02 engineering and technology Zinc Catalysis Catalytic reforming Chemical engineering Yield (chemistry) 0202 electrical engineering electronic engineering information engineering Selectivity Waste Management and Disposal Agronomy and Crop Science Syngas |
| Zdroj: | Biomass and Bioenergy. 125:70-78 |
| ISSN: | 0961-9534 |
| Popis: | Catalytic reforming has been considered as an effective technique to produce hydrogen (H2)/syngas from the various feedstocks. The present study focussed on the dry reforming of biogas with Ni (10 wt %) catalysts supported on ceria (CeO2) and Ni catalyst with mixed support of ceria and zinc oxide (ZnO). The synthesized catalysts were characterized by H2-TPR, FESEM, EDX, XRD and BET techniques. The effect of Zn loading (10 and 20 wt %) on the catalytic activity was assessed with respect to various performance parameters. Increased reaction temperature from 650 °C to 900 °C caused a significant increase in reactant conversion and product yield. At 650 °C, CH4 conversion and H2 selectivity achieved were 18.1 and 5.2%, respectively, whereas, at 900 °C, enhanced CH4 conversion (78.5%) and H2 (35.7%) selectivity was achieved with Ni0.1/CeO2 catalyst. Further, it was observed that Ni supported on mixed support exhibited higher reactant conversions when compared to Ni supported with ceria. At 900 °C, Ni0.10/(Zn0.1-Ce0.9) catalyst showed higher CH4 and CO2 conversion of 83.1 and 97.0%, respectively, with 40.3% of H2 enrichment. Carbon deposition rate in mixed support catalyst was observed to be less when compared to single support material after 7 h of continuous dry reforming reaction. Further, in order to reduce carbon deposition on the catalyst bed, dry oxidative reforming was carried out at 650 °C with varying proportions of O2/CH4 ratio which resulted in significantly higher CH4 conversion with low catalyst deposition. |
| Databáze: | OpenAIRE |
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