To analyze the cost of cellulase enzyme usage and steam energy in commercial scale of cassava ethanol production for the three scenarios of cassava cellulose utilization, a simplified flowsheet simulation model was established on Aspen plus platform. The production capacity of fuel ethanol (99.5%, w/w) was 200,000 t/a using cassava as feedstock. Ten components were included in the model including ethanol, water, glucose, cellulose, xylan, lignin, extractive, CO2, and O2 as shown in Table 4. The physical property data were either from built-in database of Aspen plus system, or from the published NREL data (Wooley and Putsche, 1996). The NRTL equation was selected as the base thermodynamic method.
The major assumptions of the model include:
To analyze the cost of cellulase enzyme usage and steam energy in commercial scale of cassava ethanol production for the three scenarios of cassava cellulose utilization, a simplified flowsheet simulation model was established on Aspen plus platform. The production capacity of fuel ethanol (99.5%, w/w) was 200,000 t/a using cassava as feedstock. Ten components were included in the model including ethanol, water, glucose, cellulose, xylan, lignin, extractive, CO2, and O2 as shown in Table 4. The physical property data were either from built-in database of Aspen plus system, or from the published NREL data (Wooley and Putsche, 1996). The NRTL equation was selected as the base thermodynamic method.The major assumptions of the model include:
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