Comparative environmental and economic performance of solar energy integrated methanol production systems in China
Comparative environmental and economic performance of solar energy integrated methanol production systems in China
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DOI：
10.1016/j.enconman.2019.03.013
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发表时间：
2019-05-01
影响因子：
10.4
通讯作者：
Sun, Yuhan
中科院分区：
文献类型：
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作者：
Chen, Qianqian;Gu, Yu;Sun, Yuhan
我国传统的煤气化制甲醇技术存在严重的环境问题。因此，大量的研究集中在低碳甲醇生产的解决方案。利用GaBi软件对我国太阳能集成甲醇生产系统的生命周期环境经济性能进行了分析比较。本研究涉及三种甲醇生产路线：常规煤制甲醇系统（基线方案）、太阳能与煤气化耦合制甲醇系统（方案1）、太阳能-生物质辅助CO2加氢制甲醇系统（方案2）。结果表明，案例1和案例2的环境影响至少是45.7%和57.5%，分别小于基准案例的选定的影响类别。在案例2中，采用生物质整体气化联合循环（Bio-IGCC）与CO2捕集系统导致整个系统的负生命周期温室气体排放（-1092.1 kgCO（2）eq/吨）。但在经济性方面，案例1和案例2的甲醇成本约为基线案例（1593.4元/吨）的3倍和5倍。如果考虑到世界银行报告的2030年平均碳税水平（500元/吨CO（2）eq），预计案例1路线在不久的将来具有经济可行性，而案例2与基线案例相比仍难以具有经济优势。解决案例2成本问题的关键在于开发高效的光伏发电和生物质整体气化联合循环系统，降低太阳能光伏电站、生物质整体气化联合循环站和电解水用聚合物电解质膜组件的资金成本。
Conventional coal gasification to methanol technology in China results in serious environmental problems. Therefore, a great number of studies focus on the low carbon solutions for methanol production. Our work analyzed and compared the life cycle environmental and economic performance of solar energy integrated methanol production systems in China with the aid of GaBi software. There are three methanol production routes involved in our study: conventional coal to methanol system (Baseline case), solar energy coupled with coal gasification to methanol system (Case-1), solar energy-biomass assisted CO2 hydrogenation to methanol system (Case-2). The results indicate that the environmental impacts of Case-1 and Case-2 are at least 45.7% and 57.5% smaller than the selected impact categories of baseline case, respectively. In Case-2, the utilization of biomass integrated gasification combined cycle (Bio-IGCC) with CO2 capture system leads to negative life cycle greenhouse gas emission (-1092.1 kgCO(2)eq/ton) of the whole system. However, in economic aspect, the methanol cost of Case-1 and Case-2 is about 3 times and 5 times that of Baseline case (1593.4 RMB/ton). If considering the average carbon tax level (500 RMB/ton CO(2)eq) in 2030 reported by World Bank, the Case-1 route is expected to be economic feasible in the near future, while the Case-2 is still difficult to have economic advantage compared with the Baseline case. The key to solving the cost problem of Case-2 lies in developing highly efficient photovoltaic electricity generation and biomass integrated gasification combined cycle system, decreasing the capital cost of solar photovoltaic power station, biomass integrated gasification combined cycle station and polymer electrolyte membrane modules for water electrolysis.