期刊
JOURNAL OF CLEANER PRODUCTION
卷 363, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2022.132367
关键词
Power-to-Methanol; Biogas; Membrane separation; Plasma electrolysis; CO2 emissions; Carbon-neutral
资金
- Priority Research Centers Program through the National Research Foundation of Korea (NRF) - Ministry of Education [2014R1A6A1031189]
- Hydrogen Energy Innovation Technology Development Program of the National Research Foundation of Korea (NRF) - Korean government (Ministry of Science and ICT (MSIT) ) [NRF-2019M3E6A1064290]
The utilization of carbon dioxide to create valuable products such as methanol has the potential to address carbon emissions and global warming, while also providing a solution for the intermittency and security of renewable energy supply. This concept showcases the tremendous potential of zero-carbon-emission methanol production.
The utilization of carbon dioxide to create valuable products such as methanol shows promise for addressing the issue of carbon emissions and global warming. Concurrently, it provides a solution to the intermittency and security of renewable energy supply via the water-splitting hydrogen production process. This power-to-methanol concept has gained increased attention because methanol is a liquid that can be conveniently stored and transported under ambient conditions. While direct air capture is an expensive solution, the carbon dioxide readily available from biogas can serve as a win-win situation. Similarly, water electrolysis technologies have modular, operational, and production challenges. In the present study, carbon dioxide was sourced from biogas via membrane separation, whereas H-2 was produced using plasma electrolysis. The entire power-to-methanol scenario was simulated using Aspen Plus v11. High purity and recovery of carbon dioxide and methane (99.51 mol.% and 98.29% and 98.88 mol.% and 99.68%, respectively) were achieved via membrane separation. The plasma reactor supplied H-2 with a mass yield of similar to 50%. Pure methanol (99.97%) was produced with a per pass conversion of 19.91% (15.7% higher than the base case). A detailed exergy analysis was performed on the process, highlighting the losses in heaters, separators, and reactors. Subsequent heat integration resulted in energy savings of 6.6%, while wind power as an energy source yielded carbon-neutral emissions. This conceptual study showcases the tremendous potential of the concept of zero-carbon-emission methanol production.
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