CO2 adsorption behavior and mechanism of bifunctionalized amine-based protic ionic liquid/KIT-6 composites

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-02-10 DOI:10.1016/j.colsurfa.2025.136389

Shuting Zhang , Jianwen Wei , Linlin Geng , Lin Ge , Lei Liao

{"title":"CO2 adsorption behavior and mechanism of bifunctionalized amine-based protic ionic liquid/KIT-6 composites","authors":"Shuting Zhang , Jianwen Wei , Linlin Geng , Lin Ge , Lei Liao","doi":"10.1016/j.colsurfa.2025.136389","DOIUrl":null,"url":null,"abstract":"<div><div>Novel bifunctionalized amine-based protic ionic liquid/KIT-6 composite adsorbents for carbon dioxide (CO2) adsorption have been prepared by impregnating amine-based protic ionic liquids of different types (tetraethylenepentamine nitrate, [TEPA][NO3], or tetraethylenepentamine lysinate, [TEPA][Lys]) and concentrations (20, 30, 40, and 50 wt%) onto N-[3-(trimethoxysilyl)propyl]ethylenediamine-grafted KIT-6. These innovative hybrid adsorbents exhibited remarkable CO2 adsorption performance and thermal stability. In particular, the adsorbent with 40 wt% [TEPA][Lys] loading exhibited the highest adsorption capacity at 90 ℃ (3.670 mmol·g−1), which was almost 5 times higher than that of the original carrier KIT-6 (0.850 mmol·g−1). This excellent adsorption performance can be ascribed to the synergistic effect of strong affinity between the amine groups and CO2 and high porosity of the support. After five adsorption/desorption cycles, the CO2 adsorption by the adsorbents demonstrated significant regeneration, and the saturated adsorption capacities of 2N-K6-P30 and 2N-K6-L40 were only 8.98 % and 7.77 % lower than those of the original ones, respectively. In addition, the infrared results revealed that CO2 adsorption is a synergistic process of physical and chemical adsorption, in which chemisorption is dominated, and the CO2 adsorption mechanism is consistent with the zwitterion mechanism. In conclusion, the bifunctionalized amine-based protic ionic liquid/KIT-6 adsorbents can be suggested as potential/recyclable materials for efficient removal of CO2 from industrial flue gases after desulfurization.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"711 ","pages":"Article 136389"},"PeriodicalIF":4.9000,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0927775725002900","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

Novel bifunctionalized amine-based protic ionic liquid/KIT-6 composite adsorbents for carbon dioxide (CO₂) adsorption have been prepared by impregnating amine-based protic ionic liquids of different types (tetraethylenepentamine nitrate, [TEPA][NO₃], or tetraethylenepentamine lysinate, [TEPA][Lys]) and concentrations (20, 30, 40, and 50 wt%) onto N-[3-(trimethoxysilyl)propyl]ethylenediamine-grafted KIT-6. These innovative hybrid adsorbents exhibited remarkable CO₂ adsorption performance and thermal stability. In particular, the adsorbent with 40 wt% [TEPA][Lys] loading exhibited the highest adsorption capacity at 90 ℃ (3.670 mmol·g⁻¹), which was almost 5 times higher than that of the original carrier KIT-6 (0.850 mmol·g⁻¹). This excellent adsorption performance can be ascribed to the synergistic effect of strong affinity between the amine groups and CO₂ and high porosity of the support. After five adsorption/desorption cycles, the CO₂ adsorption by the adsorbents demonstrated significant regeneration, and the saturated adsorption capacities of 2N-K6-P30 and 2N-K6-L40 were only 8.98 % and 7.77 % lower than those of the original ones, respectively. In addition, the infrared results revealed that CO₂ adsorption is a synergistic process of physical and chemical adsorption, in which chemisorption is dominated, and the CO₂ adsorption mechanism is consistent with the zwitterion mechanism. In conclusion, the bifunctionalized amine-based protic ionic liquid/KIT-6 adsorbents can be suggested as potential/recyclable materials for efficient removal of CO₂ from industrial flue gases after desulfurization.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

期刊介绍： Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.