{"title":"用于 CO2/N2 吸附分离的 UiO-66-(OH)2/MWCNTs 复合材料的制备与表征","authors":"Chunhe Wen, Zelin Qiu, Gang Zhao, XueWen Wei, Zhaoyou Zhu, Yinglong Wang, PeiZhe Cui, Limei Zhong","doi":"10.1016/j.fuel.2024.132292","DOIUrl":null,"url":null,"abstract":"<div><p>The increasing CO<sub>2</sub> concentration in the atmosphere can lead to climate change, and CO<sub>2</sub> capture technology is one of the most direct and effective means of reducing carbon emissions. In this study, a new composite was prepared in situ by loading multi-walled carbon nanotubes (MWCNTs) onto metal–organic frameworks (MOFs) to efficiently capture CO<sub>2</sub> in flue gas. The morphological states and pore structures of the composites were analyzed using characterization methods. The CO<sub>2</sub> adsorption properties of the composites were tested at 273 K and 298 K with different MWCNTs loadings. The optimal CO<sub>2</sub> adsorption quantities of the composite material were measured to be 4.4 and 5.75 mmol/g, respectively, which increased the adsorption capacity by 66.7 % and 55 %, respectively, compared with the parent material at a pressure of 1 bar. The CO<sub>2</sub>/N<sub>2</sub> separation performance of the composites was examined using ideal adsorption solution theory calculations and dynamic adsorption breakthrough experiments. The stability of the composites was investigated by thermogravimetric analysis, acidification experiments, and cyclical adsorption–desorption experimentation. The UiO-66-(OH)<sub>2</sub>/MWCNTs composites exhibited superior CO<sub>2</sub> adsorption–separation performance, thermal stability, acid resistance, and cycling stability. Therefore, the composite has potential applications in CO<sub>2</sub> capture separation technology.</p></div>","PeriodicalId":325,"journal":{"name":"Fuel","volume":null,"pages":null},"PeriodicalIF":6.7000,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Preparation and characterization of UiO-66-(OH)2/MWCNTs composites for CO2/N2 adsorption separation\",\"authors\":\"Chunhe Wen, Zelin Qiu, Gang Zhao, XueWen Wei, Zhaoyou Zhu, Yinglong Wang, PeiZhe Cui, Limei Zhong\",\"doi\":\"10.1016/j.fuel.2024.132292\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The increasing CO<sub>2</sub> concentration in the atmosphere can lead to climate change, and CO<sub>2</sub> capture technology is one of the most direct and effective means of reducing carbon emissions. In this study, a new composite was prepared in situ by loading multi-walled carbon nanotubes (MWCNTs) onto metal–organic frameworks (MOFs) to efficiently capture CO<sub>2</sub> in flue gas. The morphological states and pore structures of the composites were analyzed using characterization methods. The CO<sub>2</sub> adsorption properties of the composites were tested at 273 K and 298 K with different MWCNTs loadings. The optimal CO<sub>2</sub> adsorption quantities of the composite material were measured to be 4.4 and 5.75 mmol/g, respectively, which increased the adsorption capacity by 66.7 % and 55 %, respectively, compared with the parent material at a pressure of 1 bar. The CO<sub>2</sub>/N<sub>2</sub> separation performance of the composites was examined using ideal adsorption solution theory calculations and dynamic adsorption breakthrough experiments. The stability of the composites was investigated by thermogravimetric analysis, acidification experiments, and cyclical adsorption–desorption experimentation. The UiO-66-(OH)<sub>2</sub>/MWCNTs composites exhibited superior CO<sub>2</sub> adsorption–separation performance, thermal stability, acid resistance, and cycling stability. Therefore, the composite has potential applications in CO<sub>2</sub> capture separation technology.</p></div>\",\"PeriodicalId\":325,\"journal\":{\"name\":\"Fuel\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":6.7000,\"publicationDate\":\"2024-06-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Fuel\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0016236124014406\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENERGY & FUELS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Fuel","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0016236124014406","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 0
摘要
大气中二氧化碳浓度的增加会导致气候变化,而二氧化碳捕集技术是减少碳排放最直接、最有效的手段之一。本研究通过在金属有机框架(MOFs)上负载多壁碳纳米管(MWCNTs),原位制备了一种新型复合材料,以高效捕集烟道气中的二氧化碳。利用表征方法分析了复合材料的形态状态和孔隙结构。在 273 K 和 298 K 条件下,测试了复合材料在不同 MWCNTs 含量下的二氧化碳吸附性能。测得复合材料的最佳 CO2 吸附量分别为 4.4 和 5.75 mmol/g,与母体材料相比,在 1 bar 压力下的吸附能力分别提高了 66.7% 和 55%。利用理想吸附溶液理论计算和动态吸附突破实验检验了复合材料的 CO2/N2 分离性能。通过热重分析、酸化实验和循环吸附-解吸实验研究了复合材料的稳定性。结果表明,UiO-66-(OH)2/MWCNTs 复合材料具有优异的二氧化碳吸附分离性能、热稳定性、耐酸性和循环稳定性。因此,该复合材料在二氧化碳捕集分离技术中具有潜在的应用前景。
Preparation and characterization of UiO-66-(OH)2/MWCNTs composites for CO2/N2 adsorption separation
The increasing CO2 concentration in the atmosphere can lead to climate change, and CO2 capture technology is one of the most direct and effective means of reducing carbon emissions. In this study, a new composite was prepared in situ by loading multi-walled carbon nanotubes (MWCNTs) onto metal–organic frameworks (MOFs) to efficiently capture CO2 in flue gas. The morphological states and pore structures of the composites were analyzed using characterization methods. The CO2 adsorption properties of the composites were tested at 273 K and 298 K with different MWCNTs loadings. The optimal CO2 adsorption quantities of the composite material were measured to be 4.4 and 5.75 mmol/g, respectively, which increased the adsorption capacity by 66.7 % and 55 %, respectively, compared with the parent material at a pressure of 1 bar. The CO2/N2 separation performance of the composites was examined using ideal adsorption solution theory calculations and dynamic adsorption breakthrough experiments. The stability of the composites was investigated by thermogravimetric analysis, acidification experiments, and cyclical adsorption–desorption experimentation. The UiO-66-(OH)2/MWCNTs composites exhibited superior CO2 adsorption–separation performance, thermal stability, acid resistance, and cycling stability. Therefore, the composite has potential applications in CO2 capture separation technology.
期刊介绍:
The exploration of energy sources remains a critical matter of study. For the past nine decades, fuel has consistently held the forefront in primary research efforts within the field of energy science. This area of investigation encompasses a wide range of subjects, with a particular emphasis on emerging concerns like environmental factors and pollution.