Economical synthesis strategy of RHO zeolites with fine-tuned composition and porosity for enhanced trace CO2 capture

doi:10.1016/j.cej.2018.11.098

	Economical synthesis strategy of RHO zeolites with fine-tuned composition and porosity for enhanced trace CO2 capture
	Guo, Ya 1,2; Wang, Shudong 1; Ke, Quanli 1,2; Sun, Tianjun 1; Wei, Xiaoli 1,2; Xu, Shutao 1
刊名	CHEMICAL ENGINEERING JOURNAL
	2019-03-01
卷号	359 页码:344-353
关键词	Silica content control Alkali metal cations Crown ether Carbon dioxide capture Zeolites
ISSN号	1385-8947
DOI	10.1016/j.cej.2018.11.098
通讯作者	Sun, Tianjun(suntianjun@dicp.ac.cn) ; Xu, Shutao(xushutao@dicp.ac.cn) ; Wang, Shudong(wangsd@dicp.ac.cn)
英文摘要	Delicate modification of the silica contents and porous structures within RHO zeolites has been readily realized by adopting a variety of alkali metal-crown ether (AMCE) complexes as the templates. Compared to the previous protocols, up to 70% of the Cs+ cations could be substituted by much cheaper K+ cations and thus the synthesis costs of RHO zeolites could be impressively reduced. The subsequent Cs-133 and Na-23 MAS NMR spectra further reveal that the Cs+ cations may aggregate with crown ether in a form of monomer or dimer complex, which then plays a significant role in the structural direction of RHO zeolites, whereas the hydrated Na+ cations mainly serve as the charge balancing cations. Meanwhile, the addition of different amount of K+ cation could result in varying degrees of template-framework interaction and consequently generates RHO zeolites with diverse compositions. Finally, the proton-type RHO zeolites were applied to the adsorptive separation of CO2/CH4/N-2 mixture. Therein, the medium-silica ones achieve fine trade-off for the adsorption capacity, selectivity and heat even under ultralow CO2 concentration, which makes them potential candidates for trace CO2 capture.
资助项目	National Natural Science Foundation of China[21776266] ; National Natural Science Foundation of China[21476231]
WOS关键词	CARBON-DIOXIDE CAPTURE ; 18-CROWN-6 ETHER ; ADSORPTION ; CS-133 ; NMR ; NA-23 ; SEPARATION ; CHEMISTRY ; CATIONS ; CESIUM
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000454137400034
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/166336]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Wang, Shudong; Sun, Tianjun; Xu, Shutao
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Guo, Ya,Wang, Shudong,Ke, Quanli,et al. Economical synthesis strategy of RHO zeolites with fine-tuned composition and porosity for enhanced trace CO2 capture[J]. CHEMICAL ENGINEERING JOURNAL,2019,359:344-353.
APA	Guo, Ya,Wang, Shudong,Ke, Quanli,Sun, Tianjun,Wei, Xiaoli,&Xu, Shutao.(2019).Economical synthesis strategy of RHO zeolites with fine-tuned composition and porosity for enhanced trace CO2 capture.CHEMICAL ENGINEERING JOURNAL,359,344-353.
MLA	Guo, Ya,et al."Economical synthesis strategy of RHO zeolites with fine-tuned composition and porosity for enhanced trace CO2 capture".CHEMICAL ENGINEERING JOURNAL 359(2019):344-353.