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Evaluation of a Direct Air Capture Process Combining Wet Scrubbing and Bipolar Membrane Electrodialysis
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-02-03 , DOI: 10.1021/acs.iecr.9b05641 Francesco Sabatino 1 , Mayank Mehta 1 , Alexa Grimm 2 , Matteo Gazzani 2 , Fausto Gallucci 1 , Gert Jan Kramer 2 , Martin van Sint Annaland 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-02-03 , DOI: 10.1021/acs.iecr.9b05641 Francesco Sabatino 1 , Mayank Mehta 1 , Alexa Grimm 2 , Matteo Gazzani 2 , Fausto Gallucci 1 , Gert Jan Kramer 2 , Martin van Sint Annaland 1
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A detailed techno-economic analysis of a novel direct air capture (DAC) process has been carried out. In this process, carbon dioxide is separated from ambient air through wet scrubbing with an aqueous potassium hydroxide solution, while the solvent regeneration and CO2 recovery is carried out through bipolar membrane electrodialysis (BPMED), a novel process exclusively based on electrical-driven regeneration. The results of the techno-economic analysis showed that the regeneration process could be less energy intensive than other solutions, requiring as low as 236 kJ/mol-CO2. However, the high costs of bipolar and ion exchange membranes make the BPMED expensive. In the base-case scenario, the total capture cost has been found to be 773 $/ton-CO2, in line with previous cost estimates for DAC but large for a second generation process. As for other DAC processes, this solution could become particularly interesting in the future, whenever cheaper renewable energy and more affordable and improved membranes become available.
中文翻译：
评价结合湿法洗涤和双极膜电渗析的直接空气捕集工艺
已经对新型直接空气捕获（DAC）工艺进行了详细的技术经济分析。在此过程中，通过用氢氧化钾水溶液湿法洗涤将二氧化碳与周围空气分离，而溶剂再生和CO 2回收则通过双极膜电渗析（BPMED）进行，这是一种专门基于电驱动再生的新工艺。技术经济分析的结果表明，与其他解决方案相比，再生过程的能源消耗更少，需要低至236 kJ / mol-CO 2。但是，双极性和离子交换膜的高成本使BPMED变得昂贵。在基本情况下，总捕集成本为773 $ /吨CO 2，与之前对DAC的成本估算相符，但对于第二代流程而言则很大。对于其他DAC工艺，只要有更便宜的可再生能源，更便宜和更优质的膜，这种解决方案在将来可能会变得特别有趣。
更新日期：2020-02-04
中文翻译：
评价结合湿法洗涤和双极膜电渗析的直接空气捕集工艺
已经对新型直接空气捕获（DAC）工艺进行了详细的技术经济分析。在此过程中，通过用氢氧化钾水溶液湿法洗涤将二氧化碳与周围空气分离，而溶剂再生和CO 2回收则通过双极膜电渗析（BPMED）进行，这是一种专门基于电驱动再生的新工艺。技术经济分析的结果表明，与其他解决方案相比，再生过程的能源消耗更少，需要低至236 kJ / mol-CO 2。但是，双极性和离子交换膜的高成本使BPMED变得昂贵。在基本情况下，总捕集成本为773 $ /吨CO 2，与之前对DAC的成本估算相符，但对于第二代流程而言则很大。对于其他DAC工艺，只要有更便宜的可再生能源，更便宜和更优质的膜，这种解决方案在将来可能会变得特别有趣。
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