Efficient and stable CO₂ capture using a scalable and spontaneous cross-linking amine-functionalized nano-Al₂O₃ adsorbent

Xuehua,Shen1,2; Feng,Yan1,2; Zhenzhong,Zeng1; Pengju,Wang1; Feng,Xie1; Xin,Sun1; Heijing,Chen1; Zuotai,Zhang1,2

2023-12

10.1039/d3ta06456e

Journal of Materials Chemistry A   影响因子和分区

2050-7488

2050-7496

Overcoming the challenges of efficiency and stability in amine-functionalized adsorbents for post-combustion CO2 capture is a pivotal goal. In this context, we propose a facile synthesis route for the polyethyleneimine (PEI)-functionalized nano-Al2O3 (PEI@Al2O3) adsorbent at a 1-ton scale, ensuring remarkable CO2 capture performance. By employing nano-Al2O3 as a support, we facilitate substantial PEI loading and induce spontaneous cross-linking of amine groups via Lewis acid sites, achieved through an innovative combination of aging and alcohol washing techniques. The cross-linking in PEI@Al2O3 effectively promotes the electron transfer from amine groups to the surface of nano-Al2O3, preventing the dehydration reaction of primary amines with CO2 to form isocyanate, thereby obtaining anti-urea properties for PEI@Al2O3. The resulting PEI@Al2O3 adsorbent exhibits excellent overall performance, including high CO2 uptake (195 mg g(-1)), fast adsorption kinetics (reaching near saturation within 10 min), consistently stable anti-urea cycling performance (with a mere 0.14% deactivation per cycle), environmentally friendly and scalable production (eliminating the need for expensive reagents), and competitive cumulative CO2 capacity (8.05 t t(-1) over 50 cycles). This breakthrough marks the advent of a new era for the advancement and practical utilization of cutting-edge amine-functionalized adsorbents.

SCI

英语

第一 ; 通讯

Science, Technology and Innovation Commission of Shenzhen Municipality[52225407] ; National Science Fund for Distinguished Young Scholars[22008104] ; National Natural Science Foundation of China["JSGG20210713091810035","KCXST20221021111208018"]

Chemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:001134783500001

Royal Society of Chemistry (RSC)

人工提交

1.School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
2.Key Laboratory of Municipal Solid Waste Recycling Technology and Management of Shenzhen City, Shenzhen 518055, China

Xuehua,Shen,Feng,Yan,Zhenzhong,Zeng,et al. Efficient and stable CO₂ capture using a scalable and spontaneous cross-linking amine-functionalized nano-Al₂O₃ adsorbent[J]. Journal of Materials Chemistry A,2023,12(5):2697-2707.

Xuehua,Shen.,Feng,Yan.,Zhenzhong,Zeng.,Pengju,Wang.,Feng,Xie.,...&Zuotai,Zhang.(2023).Efficient and stable CO₂ capture using a scalable and spontaneous cross-linking amine-functionalized nano-Al₂O₃ adsorbent.Journal of Materials Chemistry A,12(5),2697-2707.

Xuehua,Shen,et al."Efficient and stable CO₂ capture using a scalable and spontaneous cross-linking amine-functionalized nano-Al₂O₃ adsorbent".Journal of Materials Chemistry A 12.5(2023):2697-2707.