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

doi:10.1039/c9cy00136k

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Operando dual beam FTIR spectroscopy unravels the promotional effect of Zn on HZSM-5 in iso-butane aromatization
	Liu, JX ; He, N ; Zhou, W ; Shu, M ; Lin, L ; Wang, JL ; Si, R ; Xiong, G ; Xin, Q ; Guo, HC
刊名	CATALYSIS SCIENCE & TECHNOLOGY
	2019
卷号	9 期号:7 页码:1609—1620
关键词	ZSM-5 ZEOLITES PROPANE AROMATIZATION LIGHT ALKANES TRANSFORMATION ACTIVATION CATALYSTS ETHANE ACID HYDROCARBONS ZN/HZSM-5
ISSN号	2044-4753
DOI	10.1039/c9cy00136k
文献子类	期刊论文
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.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/31744]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China; 2.Dalian Univ Technol, Sch Chem Engn, Dalian 116023, Peoples R China; 3.Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116023, 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	Liu, JX,He, N,Zhou, W,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	Liu, JX.,He, N.,Zhou, W.,Shu, M.,Lin, L.,...&Guo, HC.(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	Liu, JX,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.