Performance analysis on biomass gasification-based green methanol production system
A green methanol synthesis system based on straw gasification is proposed to enhance the efficiency of biomass-derived methanol production and reduce carbon emission.This system utilizes biomass as a carbon source,employs alkaline water electrolysis to generate green hydrogen,and forms regulated syngas to produce green methanol.Through Aspen Plus simulation on the system process,the results indicate that despite the increased electricity consumption due to water electrolysis,the proposed system demonstrates significant improvements in carbon conversion rate and overall energy efficiency,reaching 65.41%and 69.47%,respectively.The exergy efficiency of the system is 67.26%,indicating a high utilization of effective energy.The dynamic payback period of the system is 8.62 years,the net present value is US＄2.101 1 million,the unit product energy consumption is 4.07 MW·h,and the unit carbon dioxide emission is as low as 0.04 t·GJ-1.These findings highlight the system's notable advantages in terms of both economic benefits and environmental protection.
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