Evolution of the reaction mechanism during the MTH induction period over the 2-dimensional FER zeolite

doi:10.1039/c6ra09237c

	Evolution of the reaction mechanism during the MTH induction period over the 2-dimensional FER zeolite
	Qi, Liang 1,2; Li, Jinzhe 1; Xu, Lei 1; Liu, Zhongmin 1
刊名	RSC ADVANCES
	2016
卷号	6 期号:61 页码:56698-56704
ISSN号	2046-2069
DOI	10.1039/c6ra09237c
文献子类	Article
英文摘要	The methanol conversion reaction mechanism over HZSM-35, an ferrierite (FER)-type zeolite with 2-D channel intersections, was investigated during the induction period. The MTH induction period could be obviously shortened by co-feeding toluene or precoking the catalyst and the formation of tetramethylcyclopentenyl cation (tetraMCP+) during the induction period was also confirmed through C-13 magic angle spinning (MAS) NMR and GC-MS experiments, suggesting the active role of aromatics. Moreover, the dual-cycle mechanism was evidently found to evolve as the induction reaction progressed. In the early stage, both the aromatic- and olefin-based routes work efficiently and pentamethylbenzene (pentaMB) was identified as the main aromatic hydrocarbon pool (HCP) species. While in the latter stage of the induction period, the olefin-based route turned out to be more dominant and pentaMB as well as hexamethylbenzene (hexaMB) became the main aromatic HCP species. Despite the limited space of the channel intersections, the reactivity of aromatics with larger molecular sizes like 1-ethyl-2,3,4,5,6-pentamethylbenzene (1-E-pentaMB) and hexaMB were much higher than lower methylbenzenes which indicates that the aromatic-based cycle can also proceed on the external acid sites of the HZSM-35 catalyst.
WOS关键词	METHANOL-TO-HYDROCARBONS ; STATE NMR-SPECTROSCOPY ; IN-SITU NMR ; OLEFINS CONVERSION ; HEPTAMETHYLBENZENIUM CATION ; AROMATIC-HYDROCARBONS ; BOND FORMATION ; CARBENIUM ION ; CO-REACTION ; H-ZSM-5
WOS研究方向	Chemistry
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000378275400120
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/170520]
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	Liu, Zhongmin
作者单位	1.Chinese Acad Sci, Natl Engn Lab Methanol Olefins, Dalian Natl Lab Clean Energy, iChEM Collaborat Innovat Ctr Chem Energy Mat,Dali, Dalian 116023, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Qi, Liang,Li, Jinzhe,Xu, Lei,et al. Evolution of the reaction mechanism during the MTH induction period over the 2-dimensional FER zeolite[J]. RSC ADVANCES,2016,6(61):56698-56704.
APA	Qi, Liang,Li, Jinzhe,Xu, Lei,&Liu, Zhongmin.(2016).Evolution of the reaction mechanism during the MTH induction period over the 2-dimensional FER zeolite.RSC ADVANCES,6(61),56698-56704.
MLA	Qi, Liang,et al."Evolution of the reaction mechanism during the MTH induction period over the 2-dimensional FER zeolite".RSC ADVANCES 6.61(2016):56698-56704.