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Poly(ethylenimine)‐Functionalized Monolithic Alumina Honeycomb Adsorbents for CO2 Capture from Air
ChemSusChem ( IF 7.5 ) Pub Date : 2016-06-15 , DOI: 10.1002/cssc.201600404 Miles A. Sakwa-Novak 1 , Chun-Jae Yoo 1 , Shuai Tan 1 , Fereshteh Rashidi 1 , Christopher W. Jones 1
ChemSusChem ( IF 7.5 ) Pub Date : 2016-06-15 , DOI: 10.1002/cssc.201600404 Miles A. Sakwa-Novak 1 , Chun-Jae Yoo 1 , Shuai Tan 1 , Fereshteh Rashidi 1 , Christopher W. Jones 1
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The development of practical and effective gas–solid contactors is an important area in the development of CO2 capture technologies. Target CO2 capture applications, such as postcombustion carbon capture and sequestration (CCS) from power plant flue gases or CO2 extraction directly from ambient air (DAC), require high flow rates of gas to be processed at low cost. Extruded monolithic honeycomb structures, such as those employed in the catalytic converters of automobiles, have excellent potential as structured contactors for CO2 adsorption applications because of the low pressure drop imposed on fluid moving through the straight channels of such structures. Here, we report the impregnation of poly(ethylenimine) (PEI), an effective aminopolymer reported commonly for CO2 separation, into extruded monolithic alumina to form structured CO2 sorbents. These structured sorbents are first prepared on a small scale, characterized thoroughly, and compared with powder sorbents with a similar composition. Despite consistent differences observed in the filling of mesopores with PEI between the monolithic and powder sorbents, their performance in CO2 adsorption is similar across a range of PEI contents. A larger monolithic cylinder (1 inch diameter, 4 inch length) is evaluated under conditions closer to those that might be used in large‐scale applications and shows a similar performance to the smaller monoliths and powders tested initially. This larger structure is evaluated over five cycles of CO2 adsorption and steam desorption and demonstrates a volumetric capacity of 350 mol
and an equilibration time of 350 min under a 0.4 m s−1 linear flow velocity through the monolith channels using 400 ppm CO2 in N2 as the adsorption gas at 30 °C. This volumetric capacity surpasses that of a similar technology considered previously, which suggested that CO2 could be removed from air at an operating cost as low as $100 per ton.
中文翻译：
聚乙烯亚胺功能化整体式蜂窝状蜂窝状吸附剂，用于从空气中捕集二氧化碳
实用有效的气固接触器的开发是CO 2捕集技术发展的重要领域。目标CO 2捕集应用，例如从电厂烟气中燃烧后的碳捕集与封存（CCS）或直接从环境空气（DAC）中提取CO 2，都要求高流量的气体以低成本进行处理。挤压成型的整体蜂窝结构，例如用于汽车催化转化器的蜂窝结构，具有作为CO 2的结构化接触器的巨大潜力由于施加在流经此类结构的直通道的流体上的压力降很低，因此可以进行吸附。在这里，我们报道了将聚亚乙基亚胺（PEI）浸渍到挤出的整体式氧化铝中以形成结构化的CO 2吸附剂，该PEI是一种通常被报道用于CO 2分离的有效氨基聚合物。首先以小规模制备这些结构化吸附剂，对其进行彻底表征，然后与具有相似组成的粉末吸附剂进行比较。尽管在整体吸附剂和粉末吸附剂之间在用PEI填充中孔时观察到一致的差异，但它们在CO 2中的性能在一系列PEI含量范围内，吸附相似。在接近于大型应用的条件下评估了较大的整体式圆柱体（直径为1英寸，长度为4英寸），并显示出与最初测试的较小整体式和粉末相似的性能。在5个CO 2吸附和蒸汽解吸循环中评估了这种较大的结构，并证明了 在400 m S -1线性流经0.4 m s -1线性流速下使用400 ppm CO 2在氮气中的体积容量为350 mol ，平衡时间为350 min 。2作为30°C下的吸附气体。该容量超过了以前考虑的类似技术的容量，这表明CO 2 可以以每吨100美元的低运营成本从空气中去除。
更新日期：2016-06-15
and an equilibration time of 350 min under a 0.4 m s−1 linear flow velocity through the monolith channels using 400 ppm CO2 in N2 as the adsorption gas at 30 °C. This volumetric capacity surpasses that of a similar technology considered previously, which suggested that CO2 could be removed from air at an operating cost as low as $100 per ton.
中文翻译：
聚乙烯亚胺功能化整体式蜂窝状蜂窝状吸附剂，用于从空气中捕集二氧化碳
实用有效的气固接触器的开发是CO 2捕集技术发展的重要领域。目标CO 2捕集应用，例如从电厂烟气中燃烧后的碳捕集与封存（CCS）或直接从环境空气（DAC）中提取CO 2，都要求高流量的气体以低成本进行处理。挤压成型的整体蜂窝结构，例如用于汽车催化转化器的蜂窝结构，具有作为CO 2的结构化接触器的巨大潜力由于施加在流经此类结构的直通道的流体上的压力降很低，因此可以进行吸附。在这里，我们报道了将聚亚乙基亚胺（PEI）浸渍到挤出的整体式氧化铝中以形成结构化的CO 2吸附剂，该PEI是一种通常被报道用于CO 2分离的有效氨基聚合物。首先以小规模制备这些结构化吸附剂，对其进行彻底表征，然后与具有相似组成的粉末吸附剂进行比较。尽管在整体吸附剂和粉末吸附剂之间在用PEI填充中孔时观察到一致的差异，但它们在CO 2中的性能在一系列PEI含量范围内，吸附相似。在接近于大型应用的条件下评估了较大的整体式圆柱体（直径为1英寸，长度为4英寸），并显示出与最初测试的较小整体式和粉末相似的性能。在5个CO 2吸附和蒸汽解吸循环中评估了这种较大的结构，并证明了
在400 m S -1线性流经0.4 m s -1线性流速下使用400 ppm CO 2在氮气中的体积容量为350 mol ，平衡时间为350 min 。2作为30°C下的吸附气体。该容量超过了以前考虑的类似技术的容量，这表明CO 2 可以以每吨100美元的低运营成本从空气中去除。
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