Renewable electricity has been developed very fast to reduce both the reliance on fossil energy and CO₂ emission, and its utilization for the sustainable production of chemical products is of increasingly interest. In this work, opportunities for renewable electricity utilization in coal to liquid fuels process are studied through thermodynamic and techo-economic analysis. Three CPtL (coal and renewable power to liquid fuels) processes are investigated, namely Case GSP + E, Case Shell + E and Case Texaco + E. Exergy losses of the subsystems are quantitatively analyzed, and measures to reduce exergy losses are proposed. By integration with renewable electricity, carbon efficiency could be improved by 69.09–99.44%, and life cycle CO₂ emission could be reduced by 37.81–44.85%; however, the production cost is raised by 54.18–94.07% due to the high cost of electricity and electrolyzer. Sensitivity analysis shows that electricity price has the most significant impact on the production cost. At present market conditions, CPtL is incompetent with coal to liquid fuels (CtL) process yet from the viewpoint of economics, but it might become viable in the future by decreasing electricity price (0.07–0.01 $/kWh), electrolyzer cost (1150–640 $/kW) and electricity consumption of electrolysis (4.70–4.05 kWh/Nm³ H₂).

可再生电力的发展非常迅速，以减少对化石能源的依赖和 CO ₂排放，其在化工产品的可持续生产中的应用越来越受到关注。在这项工作中，通过热力学和技术经济分析研究了煤制液体燃料过程中可再生电力利用的机会。研究了三个CPtL（煤和可再生能源到液体燃料）过程，即Case GSP + E、Case Shell + E 和Case Texaco + E。定量分析了子系统的火用损失，并提出了减少火用损失的措施。通过与可再生电力整合，碳效率可提高 69.09-99.44%，生命周期 CO ₂排放量可减少 37.81–44.85%；然而，由于电力和电解槽的成本高，生产成本提高了 54.18-94.07%。敏感性分析表明，电价对生产成本的影响最为显着。在目前的市场条件下，从经济角度来看，CPtL 还不能胜任煤制液体燃料 (CtL) 过程，但在未来通过降低电价 (0.07-0.01 $/kWh)、电解槽成本 (1150- 640 $/kW) 和电解的电力消耗 (4.70–4.05 kWh/Nm ³ H ₂ )。