An efficient ammonium chloride roasting approach to separating salt from the electrolytic carbon in molten carbonate

IF 9 1区 工程技术 Q1 ENGINEERING, CHEMICAL
Kang Cheng , Yongsong Ma , Meiyu Zhao , Kaifa Du , Huayi Yin , Dihua Wang
{"title":"An efficient ammonium chloride roasting approach to separating salt from the electrolytic carbon in molten carbonate","authors":"Kang Cheng ,&nbsp;Yongsong Ma ,&nbsp;Meiyu Zhao ,&nbsp;Kaifa Du ,&nbsp;Huayi Yin ,&nbsp;Dihua Wang","doi":"10.1016/j.seppur.2022.122681","DOIUrl":null,"url":null,"abstract":"<div><p>Molten salt carbon dioxide capture and electrochemical transformation (MSCC-ET) is a promising solution for reducing global CO<sub>2</sub> emissions. However, effectively separating molten salt electrolytes from carbon material using an environmental manner remained to be solved. Typical separation methods (acid-leaching and water-leaching) will generate secondary CO<sub>2</sub> emissions and need a high consumption of water and heat energy. Herein, we propose an ammonium chloride (NH<sub>4</sub>Cl) roasting approach (ACRA) to separate lithium salts from the carbon obtained by the MSCC-ET process. Using the NH<sub>4</sub>Cl-assisted roasting approach, the low-soluble Li<sub>2</sub>CO<sub>3</sub> is converted to high-soluble LiCl that can be easily separated from the carbon. The recovery rate of carbon material reaches 91.67 % at optimal roasting conditions. Compared with water-leaching method, ACRA process can save 80.61 % of water and 76.79 % of heat energy. In addition, ACRA process can save 56.36 % of water and 47.78 % of heat energy comparing with acid-leaching method. All in all, this work provides a closed-loop strategy to separate and reutilize molten salt electrolytes for the MSCC-ET.</p></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"306 ","pages":"Article 122681"},"PeriodicalIF":9.0000,"publicationDate":"2023-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Separation and Purification Technology","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1383586622022389","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 3

Abstract

Molten salt carbon dioxide capture and electrochemical transformation (MSCC-ET) is a promising solution for reducing global CO2 emissions. However, effectively separating molten salt electrolytes from carbon material using an environmental manner remained to be solved. Typical separation methods (acid-leaching and water-leaching) will generate secondary CO2 emissions and need a high consumption of water and heat energy. Herein, we propose an ammonium chloride (NH4Cl) roasting approach (ACRA) to separate lithium salts from the carbon obtained by the MSCC-ET process. Using the NH4Cl-assisted roasting approach, the low-soluble Li2CO3 is converted to high-soluble LiCl that can be easily separated from the carbon. The recovery rate of carbon material reaches 91.67 % at optimal roasting conditions. Compared with water-leaching method, ACRA process can save 80.61 % of water and 76.79 % of heat energy. In addition, ACRA process can save 56.36 % of water and 47.78 % of heat energy comparing with acid-leaching method. All in all, this work provides a closed-loop strategy to separate and reutilize molten salt electrolytes for the MSCC-ET.

一种有效的氯化铵焙烧方法从熔融碳酸盐中分离出盐和电解碳
熔融盐二氧化碳捕获和电化学转化(MSCC-ET)是一种很有前途的减少全球二氧化碳排放的解决方案。然而,如何以一种环保的方式有效地从碳材料中分离熔盐电解质仍有待解决。典型的分离方法(酸浸和水浸)会产生二次CO2排放,并且需要消耗大量的水和热能。在此,我们提出了一种氯化铵(NH4Cl)焙烧方法(ACRA)来分离MSCC-ET工艺获得的碳中的锂盐。采用nh4cl辅助焙烧方法,将低溶性Li2CO3转化为易与碳分离的高溶性LiCl。在最佳焙烧条件下,炭料回收率达91.67%。与水浸法相比,ACRA法节水80.61%,节约热能76.79%。与酸浸法相比,ACRA法节水56.36%,节约热能47.78%。总之,这项工作为MSCC-ET提供了一种分离和再利用熔盐电解质的闭环策略。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Separation and Purification Technology
Separation and Purification Technology 工程技术-工程:化工
CiteScore
14.00
自引率
12.80%
发文量
2347
审稿时长
43 days
期刊介绍: Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.
×
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
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
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 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信