Operando dual beam FTIR spectroscopy unravels the promotional effect of Zn on HZSM-5 in iso-butane aromatization

doi:10.1039/c9cy00136k

	Operando dual beam FTIR spectroscopy unravels the promotional effect of Zn on HZSM-5 in iso-butane aromatization
	Zhou, Wei 1,2; Liu, Jiaxu 1,2; He, Ning 1,2; Shu, Miao 3; Lin, Long 1,2; Wang, Jilei 1,2; Si, Rui 3; Xiong, Guang 1,2; Xin, Qin 4; Guo, Hongchen 1,2
刊名	CATALYSIS SCIENCE & TECHNOLOGY
	2019-04-07
卷号	9 期号:7 页码:1609-1620
ISSN号	2044-4753
DOI	10.1039/c9cy00136k
通讯作者	Guo, Hongchen(hongchenguo@dlut.edu.cn)
英文摘要	Although zinc-promoted HZSM-5 catalysts have been widely used in the aromatization of short-chain hydrocarbons, the precise role of Zn in catalysis is still unclear due to the complex reaction mechanism and the lack of in situ or operando techniques. A home-built dual beam Fourier transform infrared (DB-FTIR) spectrometer, designed to eliminate the interference of gas-phase molecular vibration and heat irradiation through collecting reference and sample spectra simultaneously, can present an unimpeded view of the dynamic surface processes involved in gas/solid heterogeneous catalysis under real reaction conditions. With the aid of the DB-FTIR spectrometer, we directly observed the reaction process of iso-butane aromatization over HZSM-5 and Zn/HZSM-5. Unlike conventional studies, the aromatization was firstly performed under sub-atmospheric pressures using a home-built fixed-bed reactor. Comprehensive characterization results demonstrate that, besides their good dehydrogenation abilities, Zn species undergo strong interactions with olefin intermediates, even at sub-atmospheric pressures, but weaker interaction (or adsorption) with final aromatic products. Density functional theory studies certify that strong interactions could inhibit the desorption of olefin intermediates, which is beneficial for secondary chain-growth reactions relating to aromatics.
资助项目	National Natural Science Foundation of China[21603023] ; Dalian high level talent innovation support program[2017RQ011]
WOS关键词	ZSM-5 ZEOLITES ; PROPANE AROMATIZATION ; LIGHT ALKANES ; TRANSFORMATION ; ACTIVATION ; CATALYSTS ; ETHANE ; ACID ; HYDROCARBONS ; ZN/HZSM-5
WOS研究方向	Chemistry
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000463950800005
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; Dalian high level talent innovation support program ; Dalian high level talent innovation support program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Dalian high level talent innovation support program ; Dalian high level talent innovation support program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Dalian high level talent innovation support program ; Dalian high level talent innovation support program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Dalian high level talent innovation support program ; Dalian high level talent innovation support program
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/165648]
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	Guo, Hongchen
作者单位	1.Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116023, Peoples R China 2.Dalian Univ Technol, Sch Chem Engn, Dalian 116023, Peoples R China 3.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China 4.Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Wei,Liu, Jiaxu,He, Ning,et al. Operando dual beam FTIR spectroscopy unravels the promotional effect of Zn on HZSM-5 in iso-butane aromatization[J]. CATALYSIS SCIENCE & TECHNOLOGY,2019,9(7):1609-1620.
APA	Zhou, Wei.,Liu, Jiaxu.,He, Ning.,Shu, Miao.,Lin, Long.,...&Guo, Hongchen.(2019).Operando dual beam FTIR spectroscopy unravels the promotional effect of Zn on HZSM-5 in iso-butane aromatization.CATALYSIS SCIENCE & TECHNOLOGY,9(7),1609-1620.
MLA	Zhou, Wei,et al."Operando dual beam FTIR spectroscopy unravels the promotional effect of Zn on HZSM-5 in iso-butane aromatization".CATALYSIS SCIENCE & TECHNOLOGY 9.7(2019):1609-1620.