综合二氧化碳捕获和转化为合成气

IF 2.2 4区 化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR European Journal of Inorganic Chemistry Pub Date : 2024-11-11 DOI:10.1016/j.joule.2024.10.010
Yongwook Kim, Eric W. Lees, Chaitanya Donde, Andrew M.L. Jewlal, Christopher E.B. Waizenegger, Basil M.W. de Hepcée, Grace L. Simpson, Akshi Valji, Curtis P. Berlinguette
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引用次数: 0

摘要

要将废弃的二氧化碳(CO2)转化为有价值的化学品和燃料,电解槽必须与上游的二氧化碳捕集步骤相结合。然而,由于二氧化碳捕获和转化率不匹配,这种整合尚未得到证实。我们介绍了一种二氧化碳捕集-转化集成系统,该系统在稳定状态下产生的合成气中,H2 与 CO 的比例为 1.7:1,捕集率与电解槽中的释放率相匹配。该系统采用填料床吸收器,其中 K2CO3 溶液与模拟烟气中的 CO2 反应生成富含(双)碳酸盐的溶液,然后将其送入电解槽生成 CO 和 OH-。碱性产物再循环到吸收器,完成二氧化碳捕获-转化循环。利用甘氨酸作为二氧化碳捕获促进剂,该系统可从模拟烟气中捕获 30% 的碳,在 100 mA cm-2 的条件下,30 小时内二氧化碳转化为 CO 的法拉第效率为 30%。
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Integrated CO2 capture and conversion to form syngas
To convert waste carbon dioxide (CO2) into valuable chemicals and fuels, electrolyzers must be integrated with an upstream CO2 capture step. However, this integration has not been demonstrated due to the mismatched rates between CO2 capture and conversion. We present an integrated CO2 capture-conversion system that produces syngas with a 1.7:1 H2 to CO ratio at steady state, where the capture rate matches the release rate in the electrolyzer. The system uses a packed-bed absorber where K2CO3 solutions react with CO2 from simulated flue gas to form (bi)carbonate-enriched solutions, which are then fed into an electrolyzer to produce CO and OH. The alkaline product is recycled to the absorber, completing the CO2 capture-conversion loop. With glycine as a CO2 capture promoter, the system captures 30% of carbon from simulated flue gas with a Faradaic efficiency of 30% for CO2 conversion to CO at 100 mA cm−2 over 30 h.
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来源期刊
European Journal of Inorganic Chemistry
European Journal of Inorganic Chemistry 化学-无机化学与核化学
CiteScore
4.30
自引率
4.30%
发文量
419
审稿时长
1.3 months
期刊介绍: The European Journal of Inorganic Chemistry (2019 ISI Impact Factor: 2.529) publishes Full Papers, Communications, and Minireviews from the entire spectrum of inorganic, organometallic, bioinorganic, and solid-state chemistry. It is published on behalf of Chemistry Europe, an association of 16 European chemical societies. The following journals have been merged to form the two leading journals, European Journal of Inorganic Chemistry and European Journal of Organic Chemistry: Chemische Berichte Bulletin des Sociétés Chimiques Belges Bulletin de la Société Chimique de France Gazzetta Chimica Italiana Recueil des Travaux Chimiques des Pays-Bas Anales de Química Chimika Chronika Revista Portuguesa de Química ACH—Models in Chemistry Polish Journal of Chemistry The European Journal of Inorganic Chemistry continues to keep you up-to-date with important inorganic chemistry research results.
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