Bioprocess Engineering Multiple Choice Questions on “Heat of Reaction for Processes with Biomass Production”.
1. What is the process of making biomass energy?
A. Oxidation
B. Combustion
C. Reduction
D. Vaporization
Answer: B
2. Refer to Q2 and estimate that the synthesis gas obtained from a coal gasification process can be used for producing methanol, which is used as fuel in direct-methanol fuel cells. Determine the rate of production of methanol if the reaction shown below is releasing 21.6 kW of energy.
CO(g) + 2H2(g) -> CH3OH(l) ΔHr° = -128.08 kJ/mol
A. 455.6 mol/hr
B. 457.2 mol/hr
C. 450.9 mol/hr
D. 454.5 mol/hr
Answer: B
3. Refer to Q4, and calculate 50% excess air.
A. 22.2 kg-air/kg-fuel
B. 23.2 kg-air/kg-fuel
C. 20.2 kg-air/kg-fuel
D. 20.3 kg-air/kg-fuel
4. “Thermal conversion of organic matter with an oxidant (normally oxygen) to produce primarily carbon dioxide and water”, which term is used for this process?
A. Oxidation
B. Pyrolysis
C. Combustion
D. Gasification
Answer: C
5. ”Thermal conversion (destruction) of organics in the absence of oxygen”, which term is used for this process?
A. Reduction
B. Pyrolysis
C. Combustion
D. Gasification
Answer: B