The Effect of CO2 Co-feeding in Steam Reforming of Methane: A Thermodynamic Equilibrium Analysis
محل انتشار: شانزدهمین کنگره ملی مهندسی شیمی ایران
سال انتشار: 1397
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 378
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شناسه ملی سند علمی:
NICEC16_205
تاریخ نمایه سازی: 7 خرداد 1398
چکیده مقاله:
The effect of co-feeding of carbon dioxide in steam reforming of methane on the syngas product composition and coke formation tendency was studied by thermodynamics equilibrium analysis using constrained Gibbs free energy minimization method (T=800°C, P=20 bar). Side reactions including water-gas shift and solid carbon (coke) formation were also taken into account. Replacing steam with equivalent amount of CO2 (by maintaining a constant (CO2+H2O)/CH4 ratio in the feed) increases the susceptibility to coke formation illustrating the higher potential of steam as a coke removing agent compared to carbon dioxide. The equilibrium calculation results were compared with literature data for combined reforming of methane over a variety of catalysts under same reaction conditions. Favorable agreements with experimental results were observed. The findings of this work would be useful for designing experimental conditions for catalytic process development under which the reactant conversions are maximized while coke formation (and thus, catalyst deactivation) is minimized.
کلیدواژه ها:
نویسندگان
Saeed Sahebdelfar
Petrochemical Research and Technology Co., National Petrochemical Company, P.O. Box ۱۴۳۵۸-۸۴۷۱۱,Tehran, Iran