Catalytic steam reforming of biogas – Effects of feed composition and operating conditions
| Autor: | Magali Ferrandon, Shabbir Ahmed, Sheldon H. D. Lee |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Methane reformer
Chemistry Renewable Energy Sustainability and the Environment Energy Engineering and Power Technology Condensed Matter Physics Methane Water-gas shift reaction Catalysis Steam reforming chemistry.chemical_compound Fuel Technology Chemical engineering Biogas Carbon dioxide Organic chemistry Space velocity |
| Zdroj: | International Journal of Hydrogen Energy. 40(2):1005-1015 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2014.11.009 |
| Popis: | A study was conducted on the steam reforming of biogas mixtures over a 4 wt.% Rh/La–Al2O3 catalyst, where the effects of temperature (590–685 °C), steam (S/C molar ratio = 1.28–3.86), CO2/CH4 molar ratio (0.55–1.51), and the gas hourly space velocity (9810–27,000 hr−1) on the conversions and product yields were evaluated. Within these ranges, temperature and steam had the most pronounced effect on methane and carbon dioxide conversions. The highest methane conversion observed was 99%. Low temperatures and high S/C resulted in a net CO2 production. The water gas shift reaction appeared to have a stronger effect on the CO2 conversion than the CO2 reforming reaction. Experimental methane conversions were lower than the equilibrium predicted values. Lower temperature operations yielded a lower carbon balance suggesting the tendency to form carbonaceous species other than CO, CO2, and CH4. The presence of CO2 in the biogas contributed to the CO yield (beyond that from CH4 steam reforming) only above certain CO2/CH4 ratios. |
| Databáze: | OpenAIRE |
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