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Rice husk waste-derived super-biochar with the max surface area and Philic-CO 2 textural structure: Boosting effect and mechanism of post-desilication

文献类型：期刊论文

作者Sun, Jingxiang3,4; Yan, Wen4; Liu, Xiaosheng4; Hu, Tao4; Xiong, Ya4; Tian, Shuanghong4; Feng, Jinxi2,4; Huang, Zhen1; Zhao, Zengli1
刊名CHEMICAL ENGINEERING JOURNAL
出版日期2024-06-15
卷号490页码:13
关键词CO2 Supercarbon Biochar Rice husk Adsorption Post-desilication
ISSN号1385-8947
DOI10.1016/j.cej.2024.151583
通讯作者Feng, Jinxi(jinxfeng@cityu.edu.hk)
英文摘要A super -carbon material as adsorbents of CO 2 were prepared with rice husk waste by a new two-step process, pyrolysis -activation and HF post-desilication process. This paper was focused on investigating the boosting effect and mechanism of post-desilication. It was found that the function of the post-desilication was considerably different from that of the reported pre-desilication. It could not only effectively remove Si element from rice husk biochar (RHC) but also significantly improve its performance, producing a super-biocarbon with a welldeveloped pore structure, rich C -F groups, and a 4230-m 2 g -1 surface area, which is the max surface area of known biocarbon. It could adsorb 341.5 mg g -1 CO 2 , a max CO 2 adsorption capacity of reported biocarbon, and its CO 2 /N 2 and CO 2 /H 2 O adsorption selectivity index reached as high as 22.2 and 2.1, respectively. The large surface area was mainly originated from the expansion effect of SiF 4 gas from the post-desilication, generating numerous ultra-microspores, while these C -F groups were generated by the co -reactions of the post-desilication. The ultra -high adsorption capacity was mainly from the fill -adsorption driven by the size effect of these ultramicropores and the strong CO 2 -affinity of C -F groups, and the adsorption selectivity was confirmed to depend on water-resistant and CO 2 -philic characteristics of its C -F groups by theoretical calculations and experimental observations. These findings presented not only an advanced CO 2 -capture material but also a facile way to tailor textural structure of other biochars.
WOS关键词HIERARCHICAL POROUS CARBON ; METAL-ORGANIC FRAMEWORKS ; ACTIVATED CARBON ; POSTCOMBUSTION CAPTURE ; MICROPOROUS ADSORBENTS ; FLUORINATED GRAPHENE ; PORE-SIZE ; ADSORPTION ; PERFORMANCE ; NITROGEN
资助项目National Natural Science Foundation of China[22306034] ; National Natural Science Foundation of China[21976215] ; Guangdong Provincial Natural Sci- ence Foundation[2021A1515012036]
WOS研究方向Engineering
语种英语
WOS记录号WOS:001239017000001
出版者ELSEVIER SCIENCE SA
资助机构National Natural Science Foundation of China ; Guangdong Provincial Natural Sci- ence Foundation
源URL[http://ir.giec.ac.cn/handle/344007/42000]  
专题中国科学院广州能源研究所
通讯作者Feng, Jinxi
作者单位1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China
2.City Univ Hong Kong, Sch Energy & Environm, Kowloon Tong, Hong Kong, Peoples R China
3.Guangdong Environm Protect Res Inst Co Ltd, Guangzhou 510080, Peoples R China
4.Sun Yat Sen Univ, Sch Environm Sci & Engn, 132 East Waihuan Rd, Guangzhou 510006, Peoples R China
推荐引用方式
GB/T 7714		 Sun, Jingxiang,Yan, Wen,Liu, Xiaosheng,et al. Rice husk waste-derived super-biochar with the max surface area and Philic-CO 2 textural structure: Boosting effect and mechanism of post-desilication[J]. CHEMICAL ENGINEERING JOURNAL,2024,490:13.
APA Sun, Jingxiang.,Yan, Wen.,Liu, Xiaosheng.,Hu, Tao.,Xiong, Ya.,...&Zhao, Zengli.(2024).Rice husk waste-derived super-biochar with the max surface area and Philic-CO 2 textural structure: Boosting effect and mechanism of post-desilication.CHEMICAL ENGINEERING JOURNAL,490,13.
MLA Sun, Jingxiang,et al."Rice husk waste-derived super-biochar with the max surface area and Philic-CO 2 textural structure: Boosting effect and mechanism of post-desilication".CHEMICAL ENGINEERING JOURNAL 490(2024):13.

入库方式： OAI收割

来源：广州能源研究所

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