A systematic life cycle assessment of the electroconversion of carbon dioxide

被引:6
作者
Blazer, Scott J. [1 ,2 ,3 ]
Wang, Yudong [2 ,3 ,4 ]
Xu, Nengneng [1 ,3 ]
Zhou, Xiao-Dong [1 ,2 ,3 ,4 ]
Marchetti, Barbara [5 ]
机构
[1] Univ Connecticut, Dept Chem & Biomol Engn, Storrs, CT 06269 USA
[2] Univ Louisiana Lafayette, Dept Chem Engn, Lafayette, LA 70503 USA
[3] Univ Connecticut, Ctr Clean Energy Engn, Storrs, CT 06269 USA
[4] Univ Connecticut, Dept Mech Engn, Storrs, CT 06269 USA
[5] Univ Louisiana Lafayette, Dept Chem, Lafayette, LA 70504 USA
基金
美国国家科学基金会;
关键词
Carbon utilization process; Environmental analysis; Life cycle assessment; Climate Change Mitigation; ELECTROCHEMICAL REDUCTION; CO2; CONVERSION; CHEMICALS; FUELS;
D O I
10.1016/j.seta.2023.103574
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In this study, we report a cradle-to-gate life cycle assessment of assembling and operating an electrochemical cell for conversion of carbon dioxide (CO2) to formic acid. This process is followed by product separation via liq-uid-liquid extraction. The results suggest that cell operation yields the highest environmental impact cf. other processes. Parametric studies were performed to identify conditions that minimize the environmental impact. It was found that: (i) the stability of cell components, durability of cell performance, and cell operating parameters (e.g., current density or cell voltage) play a pivotal role on the carbon emissions; (ii) the optimal parameters include stable operation for at least 4,000 h at (ultrahigh) current densities (0.50-1.00 A cm -2); (iii) through use of renewable energy sources zero carbon emissions may be achieved only if high cell performance conditions are met; and. (iv) the cumulative carbon emissions were predicted during the entire life cycle of the system (4,000 h), while modelling cell aging and corresponding decrease in performance. Here, the use of renewable energy is of outmost importance to achieve climate change mitigation.
引用
收藏
页数:8
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