Insights into CO2 adsorption on KOH-activated biochars derived from the mixed sewage sludge and pine sawdust

doi:10.1016/j.scitotenv.2022.154133

GIEC OpenIR

	Insights into CO2 adsorption on KOH-activated biochars derived from the mixed sewage sludge and pine sawdust
	Li, Kai1 ; Zhang, Dongqing 2,6; Niu, Xiaojun 1,2,4,5; Guo, Huafang3 ; Yu, Yuanyuan 2; Tang, Zhihua 3; Lin, Zhang 1; Fu, Mingli 1
	2022-06-20
发表期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
卷号	826 页码:12
通讯作者	Zhang, Dongqing(dqzhang3377@outlook.com) ; Niu, Xiaojun(scutenv@outlook.com) ; Guo, Huafang(guohf@ms.giec.ac.cn)
摘要	The environment issues associated with global warming and climate change caused by continuous increase in greenhouse gas emissions have attracted worldwide concerns. As renewable resources with good adsorption property, biochar is an efficient and environmental friendly adsorbsent for CO2 capture. In this study, the CO2 adsorption behavior of biochars derived from feedstock mixtures of 70% pine sawdust and 30% sewage sludge by KOH modification was investigated. The textual properties and functional groups of the pristine biochars have been significantly enhanced after KOH activation. With highly developed microporosity, the specific surface area (SSA) of the KOH-modified biochars increased by 3.9-14.5 times. Furthermore, higher CO2 adsorption capacities of 136.7-182.0 mg/g were observed for the modified biochars, compared to pristine ones (35.5-42.9 mg/g). The development of micropores by KOH activation significantly increased the CO2 adsorption capacity. Meanwhile, the presence of hetero atoms (O and K) also positively influenced CO2 adsorption capacity of biochar. Noticeably, both physical and chemical adsorption played a crucial role in CO2 capture, which was verified by different characterization methods including high resolution scanning electron microscope, X-ray photoelectron spectroscopy and in situ diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy. The Findings of this study demonstrate the-significance of chemical sorption by identifying the transformation of CO2 by biochar composites and in situ characterization of weakly adsorbed and newly formed mineral species during the CO2 sorption process. Moreover, BC700K showed 97% recyclability during 10 con-secutive adsorption-desorption cycles at 25 degrees C, 1 bar. The results obtained in the present study may inspire new re-search interest and provide a comprehensive insight into the research subject to biochars derived from feedstock mixtures for CO2 capture.
关键词	Biochars composite High surface area Tunable porosity Chemical sorption CO2 capture
DOI	10.1016/j.scitotenv.2022.154133
关键词[WOS]	HIGH-SURFACE-AREA ; POROUS CARBON ; PYROLYSIS ; CAPTURE ; BIOMASS ; FTIR ; MECHANISMS ; WASTE ; TEMPERATURE ; EVOLUTION
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[42177369] ; National Key Research and Development Program of China[2019YFA0210400] ; Science and Technology Planning Project ofMaoming, China[2019S002] ; Fundamental Research Funds for the Central Universities, SCUT[2020ZYGXZR105]
WOS研究方向	Environmental Sciences & Ecology
项目资助者	National Natural Science Foundation of China ; National Key Research and Development Program of China ; Science and Technology Planning Project ofMaoming, China ; Fundamental Research Funds for the Central Universities, SCUT
WOS类目	Environmental Sciences
WOS记录号	WOS:000790330100010
出版者	ELSEVIER
引用统计	被引频次：39[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/36368
专题	中国科学院广州能源研究所
通讯作者	Zhang, Dongqing; Niu, Xiaojun; Guo, Huafang
作者单位	1.South China Univ Technol, Sch Environm & Energy, Guangzhou 510006, Peoples R China 2.Guangdong Univ Petrochem Technol, Sch Environm Sci & Engn, Guangdong Prov Key Lab Petrochem Pollut Proc & Con, Maoming 525000, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy, Guangzhou 510640, Peoples R China 4.South China Univ Technol, Guangzhou Higher Educ Mega Ctr, Guangdong Prov Key Lab Atmospher Environm & Pollut, Guangzhou 510006, Peoples R China 5.South China Univ Technol, Guangzhou Higher Educ Mega Ctr, Key Lab Pollut Control & Ecosyst Restorat Ind Clus, Minist Educ, Guangzhou 510006, Peoples R China 6.Guangdong Univ Petrochem Technol, Coll Environm Sci & Engn, Maoming 525000, Peoples R China
推荐引用方式 GB/T 7714	Li, Kai,Zhang, Dongqing,Niu, Xiaojun,et al. Insights into CO2 adsorption on KOH-activated biochars derived from the mixed sewage sludge and pine sawdust[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2022,826:12.
APA	Li, Kai.,Zhang, Dongqing.,Niu, Xiaojun.,Guo, Huafang.,Yu, Yuanyuan.,...&Fu, Mingli.(2022).Insights into CO2 adsorption on KOH-activated biochars derived from the mixed sewage sludge and pine sawdust.SCIENCE OF THE TOTAL ENVIRONMENT,826,12.
MLA	Li, Kai,et al."Insights into CO2 adsorption on KOH-activated biochars derived from the mixed sewage sludge and pine sawdust".SCIENCE OF THE TOTAL ENVIRONMENT 826(2022):12.