Ultra-low volatility solid polyamine CO2 capture materials for greenhouse CO2 enrichment

IF 13.3 1区 工程技术 Q1 ENGINEERING, CHEMICAL
Cameron White, Zhijian Wan, Colin Wood, Jason Czapla
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Abstract

Yields from agriculture can be enhanced by maintaining elevated CO2 environments typically in the range of 1000 ppm CO2. Technologies that have the potential to supply these elevated CO2 levels in a carbon neutral manner can improve agricultural yields whilst mitigating further CO2 emissions. Direct air capture (DAC) is one such technology that captures and concentrates CO2 from the atmosphere. Most current DAC research focuses on producing high concentrations of CO2 which typically requires high temperature/pressure swings in order to achieve high purity CO2 streams. These conditions complicate plant design and affect the longevity of the material. This study explores the possibility of producing CO2 at suitable concentrations for agricultural yield enhancement using mild desorption conditions (50 °C and no pressure swing). A novel crosslinked polyamine formula utilising non-hazardous liquid components was developed in order to be more aligned to agricultural exposure limits. 1000 ppm CO2 could be maintained during desorption with air flow at 50 °C (with no vacuum) for up to 70 % of the materials working capacity of 3.8 wt% CO2. The longevity of the material was enhanced due to the lower desorption temperature as evidenced by no reduction in working capacity after 30 days exposure to desorption conditions (equivalent to 205 cycles).Compared to a previous work utilising the commercially available Lewatit VP OC 1065, the Lewatit resin had a repeated cyclic uptake of 4.1% wt. % CO2 compared to 3.8 wt% for the polymer used in this study.

Abstract Image

温室CO2富集的超低挥发性固体多胺CO2捕集材料
农业产量可以通过维持二氧化碳浓度升高的环境来提高,通常在1000 ppm二氧化碳的范围内。有潜力以碳中和方式供应这些升高的二氧化碳水平的技术可以提高农业产量,同时减少进一步的二氧化碳排放。直接空气捕获(DAC)就是这样一种技术,它从大气中捕获和浓缩二氧化碳。目前大多数DAC研究的重点是产生高浓度的二氧化碳,这通常需要高温/高压波动才能获得高纯度的二氧化碳流。这些条件使工厂设计复杂化,并影响材料的寿命。本研究探索了在温和的解吸条件下(50 °C和无压力变化)产生适宜浓度的二氧化碳以提高农业产量的可能性。为了更符合农业接触限值,开发了一种利用无害液体成分的新型交联多胺配方。在解吸过程中,在50 °C(无真空)的气流下,可保持1000 ppm的二氧化碳浓度,最高可达材料工作容量3.8 wt% CO2的70 %。由于较低的解吸温度,材料的寿命得到了提高,在解吸条件下暴露30 天(相当于205个循环)后,工作能力没有减少。与之前使用商用lewait VP OC 1065的研究相比,lewait树脂的重复循环吸收率为4.1% wt. %,而本研究中使用的聚合物的吸收率为3.8% wt%。
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来源期刊
Chemical Engineering Journal
Chemical Engineering Journal 工程技术-工程:化工
CiteScore
21.70
自引率
9.30%
发文量
6781
审稿时长
2.4 months
期刊介绍: The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.
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