利用风电进行CO_(2)加氢制甲醇与天然气和煤路线对比的技术经济分析

Technical economic analysis on comparing CO_(2)hydrogenation to methanol using wind power with natural gas and coal routes

将水电解､CO_(2)捕集､风力发电引入甲醇生产,在200 t/d的产能下,利用Aspen Plus对天然气重整､煤气化､CO_(2)直接加氢3种路线生产甲醇进行流程模拟,并依据模拟结果进行成本估算､碳排放分析和敏感性分析,分析引入电解水､CO_(2)捕集和风力发电的经济和环境效益。结果显示,在200 t/d的产能下,路线三(CO_(2)直接加氢)的成本高达9944.1元/t,远高于路线一(天然气重整,2595.2元/t)和路线二(煤气化,2266.5元/t),但路线三每t甲醇生产可减少CO_(2)排放0.57 t,相比另外2种方式的高额碳排放(0.67 t CO_(2)/t MeOH和2.29 t CO_(2)/t MeOH)具有巨大的优势。当电解水成本下降和高额碳税存在时,路线三有望实现商业应用。

Water electrolysis,CO_(2)capture,and wind power are used in methanol production.Under a production capacity of 200 tons per day,three methanol production routes,including natural gas reforming,coal gasification,and CO_(2)direct hydrogenation,are simulated by Aspen Plus software.Based on the simulation results,cost estimation,carbon dioxide emission analysis and sensitivity analysis are carried out.The economic and environmental benefits in using water electrolysis,CO_(2)capture,and wind power are analyzed.It is shown that under a production capacity of 200 tons per day,the cost of CO_(2)direct hydrogenation route is as high as RMB 9944.1 per ton,much higher than RMB 2595.2 per ton of natural gas reforming route and RMB 2266.5 per ton of coal gasification route.CO_(2)direct hydrogenation route can reduce CO_(2)emissions by 0.57 tons per ton of methanol production,on the contrary,natural gas reforming route will discharge 0.67 tons of CO_(2)per ton of methanol production,and coal gasification route will discharge 2.29 tons of CO_(2)per ton of methanol production.CO_(2)direct hydrogenation route is expected to achieve commercial application if the cost of water electrolysis falls further and high carbon taxes execute.