Giuliano Aristide, Freda Cesare, Catizzone Enrico
ENEA-Italian Agency for New Technologies, Energy and Sustainable Economic Development, Department of Energetic Technologies, Trisaia Research Centre, I-75026 Rotondella, Italy.
Bioengineering (Basel). 2020 Jul 4;7(3):70. doi: 10.3390/bioengineering7030070.
The biomass-to-methanol process may play an important role in introducing renewables in the industry chain for chemical and fuel production. Gasification is a thermochemical process to produce syngas from biomass, but additional steps are requested to obtain a syngas composition suitable for methanol synthesis. The aim of this work is to perform a computer-aided process simulation to produce methanol starting from a syngas produced by oxygen-steam biomass gasification, whose details are reported in the literature. Syngas from biomass gasification was compressed to 80 bar, which may be considered an optimal pressure for methanol synthesis. The simulation was mainly focused on the water-gas shift/carbon capture sections requested to obtain a syngas with a ( - )/( + ) molar ratio of about 2, which is optimal for methanol synthesis. Both capital and operating costs were calculated as a function of the conversion in the water-gas shift (WGS) step and absorption level in the carbon capture (CC) unit (by Selexol process). The obtained results show the optimal conversion is 40% with capture from the syngas equal to 95%. The effect of the WGS conversion level on methanol production cost was also assessed. For the optimal case, a methanol production cost equal to 0.540 €/kg was calculated.
生物质制甲醇工艺在将可再生能源引入化工和燃料生产产业链中可能发挥重要作用。气化是一种由生物质生产合成气的热化学过程，但需要额外的步骤来获得适合甲醇合成的合成气组成。本工作的目的是进行计算机辅助过程模拟，从氧气 - 蒸汽生物质气化产生的合成气出发生产甲醇，其详细信息已在文献中报道。来自生物质气化的合成气被压缩至80巴，这可被视为甲醇合成的最佳压力。模拟主要集中在水煤气变换/碳捕集部分，以获得摩尔比约为2的（ - ）/（ + ）合成气，这对甲醇合成是最佳的。资本成本和运营成本均作为水煤气变换（WGS）步骤中的转化率以及碳捕集（CC）单元（通过Selexol工艺）中的吸收水平的函数进行计算。所得结果表明，最佳转化率为40%，合成气的捕集率为95%。还评估了WGS转化率水平对甲醇生产成本的影响。对于最佳情况，计算得出甲醇生产成本为0.540 €/kg。
