化工新型材料

化工新型材料 ›› 2024, Vol. 52 ›› Issue (9) : 215-221. DOI: 10.19817/j.cnki.issn1006-3536.2024.09.042

科学研究

用于空气捕集CO₂的多孔复合吸附剂载体优化和解吸性能研究

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Research on the optimization and desorption performance of porous composite adsorbent carrier for air capture of CO₂

Fu Lin¹, Wang Zhengfeng², Chen Yizhuo³, Wang Zebin³, Liu Weishan³, Wang Tao³

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文章历史 +

Received
2023-05-09
Issue Date	Revised Date
2024-09-29	2023-05-09

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摘要

空气直接捕集CO₂技术(DAC)是一种灵活有效的减排方式,其中,变湿再生吸附技术仅利用常温常压下水分子的蒸发自由能即可实现超低分压CO₂的吸附分离,突破常规变温/变压再生吸附技术的高能耗限制,被认为是当下最具前景的低能耗捕集技术之一。针对空气直接捕集CO₂领域吸附剂的关键制备工艺,改进了相转换法成型工艺,并对最优的多孔复合吸附剂进行解吸性能研究。通过选用季铵型强碱性离子交换树脂D290作为活性吸附组分,醋酸纤维素(CA)和聚醚砜(PES)作为惰性载体,优化活性树脂与载体的配比,筛选出具有最优吸附解吸性能的多孔复合吸附剂。结果表明:活性组分和CA配比为6∶4的D290/CA型吸附剂的吸附性能(0.70mmol/g)和解吸性能(0.23mmol/g)最优;多孔复合吸附剂的解吸率随着解吸温度提高(45℃,解吸附率为85%)而上升;随解吸环境CO₂分压提高而下降,在85%吸附饱和度下,CO₂分压由1000×10^-6增至1500×10^-6时,解吸附速率由0.0005s^-1快速下降至0.00015s^-1;最后,合理减小多孔复合吸附剂的厚度可在一定程度上提高其解吸附速率。

Abstract

Direct air capture (DAC) technology of CO₂ is a flexible and effective emission reduction method,among which the moisture swing regeneration technology is considered to be one of the most promising low-energy capture technologies because it can achieve ultra-low pressure CO₂ adsorption and separation only by utilizing the free energy of water molecule evaporation at ambient temperature and pressure,overcoming the high energy consumption limitation of conventional temperature/pressure swing methods.This article focused on the systematic study of the key preparation process of adsorbents in the field of direct air capture of CO₂,improved the phase conversion molding process,and investigated the desorption performance of the optimal porous composite adsorbents.The quaternary ammonium strong basic ion exchange resin D290 was selected as the active adsorption component,while cellulose acetate (CA) and polyether sulfone (PES) were used as inert carriers,the porous composite adsorbent with optimal adsorption and desorption performance was screened out by optimizing the ratio of active resin to carrier.The experimental results showed that the D290/CA type adsorbent with a ratio of active component to CA of 6∶4 had the best adsorption capacity (0.70mmol/g) and desorption capacity (0.23mmol/g).The desorption rate of the porous composite adsorbent increased with the increase of desorption temperature (85% desorption rate at 45℃) and decreased with the increase of CO₂ partial pressure in the desorption environment.At 85% adsorption saturation,when the CO₂ partial pressure increased from 1000 ppm to 1500 ppm,the desorption rate constant decreased rapidly from 1000×10^-6 to 1500×10^-6.Finally,it was found that reducing the thickness of the adsorbent material reasonably could improve its desorption rate to a certain extent.

关键词

空气直接CO₂捕集 / 变湿再生 / 离子交换树脂 / 解吸附动力学

Key words

direct air capture of CO₂ / moisture swing regeneration / ion exchange resin / desorption kinetics

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用于空气捕集CO₂的多孔复合吸附剂载体优化和解吸性能研究[J]. 化工新型材料, 2024, 52(9): 215-221 DOI:10.19817/j.cnki.issn1006-3536.2024.09.042

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参考文献

原文顺序 | 出版日期 | 本文引用

[1] International Energy Agency.Global energy review 2021-assessing the effects of economic recoveries on global energy demand and CO₂ emissions in 2021[R].Paris:IEA,2021.
[2] Tollefson J.COVID curbed carbon emissions in 2020—but not by much[EB/OL].(2021-02-7)[2023-06-29].https://www.nature.com/articles/d41586-021-00090-3.
[3] 张君宇,宋猛,刘伯恩.中国二氧化碳排放现状与减排建议[J].中国国土资源经济,2022,35(4):38-44,50.
[4] 徐锶瑶,侯成龙,王涛.季铵型变湿再生材料CO₂吸附热量迁移研究[J].能源工程,2021(1):54-62,88.
[5] International Energy Agency.Energy technology perspectives 2020—special report on carbon capture utilisation and storage:CCUS in clean energy transitions[R].Paris:IEA,2020.
[6] Intergovernmental Panel on Climate Change.Climate change 2022:impacts,adaptation,and vulnerability[R].London:IPCC,2022.
[7] 张丰,胡狄瑞.碳达峰碳中和背景下的温室气体监测与减排研究[J].中国资源综合利用,2021,39(11):186-188.
[8] Keith D W,Holmes G,St Angelo D,et al.A process for capturing CO₂ from the atmosphere[J].Joule,2018,2(8):1573-1594.
[9] Mahmoudkhani M,Keith D W.Low-energy sodium hydroxide recovery for CO₂,capture from atmospheric air-thermodynamic analysis[J].International Journal of Greenhouse Gas Control,2009,3(4):376-384.
[10] Sinha A,Darunte L A,Jones C W,et al.Systems design and economic analysis of direct air capture of CO₂ through temperature vacuum swing adsorption using MIL-101(Cr)-PEI-800 and mmen-Mg₂(dobpdc) MOF adsorbents[J].Industrial & Engineering Chemistry Research,2017,56(3):750-764.
[11] Hoffert M I,Caldeira K,Benford G,et al.Advanced technology paths to global climate stability:energy for a greenhouse planet[J].Science,2002,298(5595):981-987.
[12] Hooker J,Duveiller G,Cescatti A.A global dataset of air temperature derived from satellite remote sensing and weather stations[J].Scientific Data,2018,5(1):1-11.
[13] Lin Q,Zhang X,Wang T,et al.Technical perspective of carbon capture,utilization,and storage[J].Engineering,2022,14:27-32.
[14] Wang T,Lackner K S,Wright A.Moisture swing sorbent for carbon dioxide capture from ambient air[J].Environmental Science & Technology,2011,45(15):6670-6675.
[15] He H,Zhong M,Konkolewicz D,et al.Three-dimensionally ordered microporous polymeric materials by colloidal crystal templating for reversible CO₂ capture[J].Advanced Functional Materials,2013,23(37):4719-4719.
[16] Lively R P,Realff M J.On thermodynamic separation efficiency:adsorption processes[J].AIChE Journal,2016,62(10):3699-3705.
[17] Wang T,Liu J,Lackner K S,et al.Characterization of kinetic limitations to atmospheric CO₂ capture by solid sorbent[J].Greenhouse Gases:Science and Technology,2015,6(1):138-149.
[18] Wurzbacher J A,Gebald C,Brunner S,et al.Heat and mass transfer of temperature-vacuum swing desorption for CO₂ capture from air[J].Chemical Engineering Journal,2016,283:1329-1338.
[19] 谢兰英,奚红霞,谢新平,等.不同边界条件下球形颗粒吸附剂内扩散方程的分析解和数值解的比较[J].离子交换与吸附,2000,16(4):289-294.
[20] Mendes A M M,Costa C A V,Rodrigues A E.Linear driving force approximation for isothermal non-isobaric diffusion/convection with binary Langmuir adsorption[J].Gas Separation & Purification,1995,9(4):259-270.
[21] Monazam E R,Shadle L J,Siriwardane R S.Equilibrium and absorption kinetics of carbon dioxide by solid supported amine sorbent[J].AIChE Journal,2011,57(11):3153-3159.
[22] Marczewski A W.Application of mixed order rate equations to adsorption of methylene blue on mesoporous carbons[J].Applied Surface Science,2010,256(17):5145-5152.
[23] Van Vuuren D P,Deetman S,van Vliet J,et al.The role of negative CO₂ emissions for reaching 2℃—insights from integrated assessment modelling[J].Climatic Change,2013,118:15-27.