화학공학소재연구정보센터
Energy Conversion and Management, Vol.191, 12-22, 2019
A steady-state equilibrium-based carbon dioxide gasification simulation model for hydrothermally carbonized cow manure
A detailed steady-state equilibrium-based simulation model was developed in Aspen Plus to demonstrate the CO2-gasification process of cow manure-derived hydrochar. Simulation was performed at gasification temperature of 700-1000 degrees C and equivalence ratio of 0.1-0.6 for HTC treatment temperatures between 180 and 260 degrees C. Various simulation outputs including gas yield, syngas composition, lower heating value, CO/CO2 conversion efficiency, H-2/CO ratio, and cold gas efficiency were evaluated. Simulation results revealed that CO concentration was increased with gasification temperature while H-2 concentration was initially increased until 950 degrees C and decreased afterwards. H-2 concentration was also decreased with the increasing equivalence ratio. However, CO concentration increased initially but started to decrease after equivalence ratio of 0.3. Gasification temperature of 850 degrees C and equivalence ratio of 0.3 resulted in the maximum concentrations of both CO and H-2 and lower heating value. Replacing CO2 with air increased the lower heating value as the concentration of H-2 was increased compared to the concentration of CO.