A bimetallic (Cu-Zn) doping platform for enhancement of CO2 capture and separation by a cost-effective biomass-based activated carbon.

IF 5.8 3区 环境科学与生态学 0 ENVIRONMENTAL SCIENCES Environmental Science and Pollution Research Pub Date : 2025-03-13 DOI:10.1007/s11356-025-36227-4
Elaheh Mehrvarz, Ali Asghar Ghoreyshi, Ghasem D Najafpour
{"title":"A bimetallic (Cu-Zn) doping platform for enhancement of CO<sub>2</sub> capture and separation by a cost-effective biomass-based activated carbon.","authors":"Elaheh Mehrvarz, Ali Asghar Ghoreyshi, Ghasem D Najafpour","doi":"10.1007/s11356-025-36227-4","DOIUrl":null,"url":null,"abstract":"<p><p>This study presents an efficient method for CO<sub>2</sub> capture and separation using low-cost corncob-based activated carbon/metal nanoparticles (MNPs/AC) composites. Initially, the optimization of AC synthesis was conducted by varying activating agent/precursor ratios and activation temperature. Subsequently, the highly porous AC was modified using a polyol method with a single and binary mixture of Cu<sup>2+</sup> and Zn<sup>2+</sup> metals. The raw AC, Cu/AC, Zn/AC, and Cu-Zn/AC composites were extensively characterized through BET, FESEM-EDX, FT-IR, TGA, and Boehm's titration analyses. Gas adsorption results revealed that the bimetallic composite sample, Cu-Zn/AC, demonstrated the highest CO<sub>2</sub> capture capacity of 5.41 mmol/g compared to the parent AC (3.25 mmol/g) as well as the single metal-doped ACs, Cu/AC (4.19 mmol/g) and Zn/AC (4.38 mmol/g) at 1 bar and 25 °C due to stronger synergistic effects. In addition, the selectivity of CO<sub>2</sub>/N<sub>2</sub> and CO<sub>2</sub>/CH<sub>4</sub> was also studied for samples using the Ideal Adsorption Solution Theory (IAST) at 25 °C and 1 bar. Among all samples, Cu-Zn/AC showed excellent selectivity towards CO<sub>2</sub>/N<sub>2</sub> and CO<sub>2</sub>/CH<sub>4</sub> with values of 65 and 16, respectively. The higher selectivity for metal-doped samples compared to the pristine AC is due to a stronger interaction between the introduced MNPs and CO<sub>2</sub> molecules, as indicated by the higher isosteric heat of CO<sub>2</sub> adsorption. These results suggest that the bimetallic (Cu-Zn) doped AC is an effective and low-cost adsorbent for natural gas upgrading and flue gas CO<sub>2</sub> capture.</p>","PeriodicalId":545,"journal":{"name":"Environmental Science and Pollution Research","volume":" ","pages":""},"PeriodicalIF":5.8000,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Environmental Science and Pollution Research","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1007/s11356-025-36227-4","RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"0","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
引用次数: 0

Abstract

This study presents an efficient method for CO2 capture and separation using low-cost corncob-based activated carbon/metal nanoparticles (MNPs/AC) composites. Initially, the optimization of AC synthesis was conducted by varying activating agent/precursor ratios and activation temperature. Subsequently, the highly porous AC was modified using a polyol method with a single and binary mixture of Cu2+ and Zn2+ metals. The raw AC, Cu/AC, Zn/AC, and Cu-Zn/AC composites were extensively characterized through BET, FESEM-EDX, FT-IR, TGA, and Boehm's titration analyses. Gas adsorption results revealed that the bimetallic composite sample, Cu-Zn/AC, demonstrated the highest CO2 capture capacity of 5.41 mmol/g compared to the parent AC (3.25 mmol/g) as well as the single metal-doped ACs, Cu/AC (4.19 mmol/g) and Zn/AC (4.38 mmol/g) at 1 bar and 25 °C due to stronger synergistic effects. In addition, the selectivity of CO2/N2 and CO2/CH4 was also studied for samples using the Ideal Adsorption Solution Theory (IAST) at 25 °C and 1 bar. Among all samples, Cu-Zn/AC showed excellent selectivity towards CO2/N2 and CO2/CH4 with values of 65 and 16, respectively. The higher selectivity for metal-doped samples compared to the pristine AC is due to a stronger interaction between the introduced MNPs and CO2 molecules, as indicated by the higher isosteric heat of CO2 adsorption. These results suggest that the bimetallic (Cu-Zn) doped AC is an effective and low-cost adsorbent for natural gas upgrading and flue gas CO2 capture.

查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
求助全文
约1分钟内获得全文 去求助
来源期刊
CiteScore
8.70
自引率
17.20%
发文量
6549
审稿时长
3.8 months
期刊介绍: Environmental Science and Pollution Research (ESPR) serves the international community in all areas of Environmental Science and related subjects with emphasis on chemical compounds. This includes: - Terrestrial Biology and Ecology - Aquatic Biology and Ecology - Atmospheric Chemistry - Environmental Microbiology/Biobased Energy Sources - Phytoremediation and Ecosystem Restoration - Environmental Analyses and Monitoring - Assessment of Risks and Interactions of Pollutants in the Environment - Conservation Biology and Sustainable Agriculture - Impact of Chemicals/Pollutants on Human and Animal Health It reports from a broad interdisciplinary outlook.
期刊最新文献
Ivan Holoubek (* April 11, 1951 † January 19, 2025) long-time director of the RECETOX Centre, Masaryk University, Brno, Czech Republic, has passed away. Simultaneous adsorption of polycyclic aromatic hydrocarbons (PAHs) on biochar from sewage sludge. A bimetallic (Cu-Zn) doping platform for enhancement of CO2 capture and separation by a cost-effective biomass-based activated carbon. Answer to "comments on an examination of daily CO2 emissions prediction through a comparative analysis of machine learning, deep learning, and statistical models". Characterization of rock aggregate properties for pavement construction in various locations in Sarawak.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1