This work presents a detailed investigation on coal/methane-based co-production of methanol and power with a two-level adjustment system, and the potential feasibility of the system were verified through thermodynamic perspective. The whole process was modeled and simulated with Aspen Plus (v8.6). The purity of methanol product in the proposed system reaches 99.3%. And almost 100% of the captured CO₂ concentration can be achieved. Meanwhile the system energy performance was presented. The net power efficiency is 4.75% while the methanol efficiency is 51.08%. Three key factors, gasification temperature, methane/coal, and steam/syngas, were analyzed. With the increase of gasification temperature, the methanol production would grow up. However, the influence of gasification temperature on the methanol concentration and whole plant efficiency were not obvious. When the methane/coal is 0.3, the methanol concentration reaches the peak value. With the increase of methane/coal, the whole plant efficiency was rose up. The methanol concentration was declined with the increase of steam/syngas, while the methanol production shown an opposite trend. And the effect of steam/syngas on the system efficiencies was not obvious.

这项工作提出了一个采用两级调节系统的煤/甲烷基联产甲醇和动力的详细研究，并通过热力学观点验证了该系统的潜在可行性。整个过程使用Aspen Plus（v8.6）进行建模和仿真。拟议系统中甲醇产品的纯度达到99.3％。几乎100％的捕获的CO ₂可以达到集中。同时介绍了系统的能源性能。净功率效率为4.75％，而甲醇效率为51.08％。分析了三个关键因素，气化温度，甲烷/煤和蒸汽/合成气。随着气化温度的升高，甲醇的产量将会增加。但是，气化温度对甲醇浓度和整个工厂效率的影响并不明显。当甲烷/煤为0.3时，甲醇浓度达到峰值。随着甲烷/煤的增加，整个工厂的效率有所提高。甲醇浓度随蒸汽/合成气的增加而下降，而甲醇生产则呈现相反的趋势。蒸汽/合成气对系统效率的影响并不明显。