Elucidating the olefin formation mechanism in the methanol to olefin reaction over AlPO-18 and SAPO-18
文献类型：期刊论文
| 作者 | Chen, Jingrun1,2; Li, Jinzhe1; Yuan, Cuiyu1; Xu, Shutao1; Wei, Yingxu1; Wang, Quanyi1,2; Zhou, You1,2; Wang, Jinbang1,2; Zhang, Mozhi1,2; He, Yanli1 |
| 刊名 | catalysis science & technology
 |
| 出版日期 | 2014 |
| 卷号 | 4期号:9页码:3268-3277 |
| 英文摘要 | the mechanism of the methanol to olefin (mto) reaction over alpo-18 (without bronsted acid sites) and two sapo-18 (with different bronsted acid site densities) catalysts has been investigated. the bronsted acid site density of alpo-18 and sapo-18 catalysts was determined by h-1 mas nmr spectroscopy. methanol conversion over the catalysts showed that the catalytic activity of the catalysts was strongly influenced by their bronsted acid site density. using c-13 magic angle spinning (mas) nmr, we directly observed the pentamethylcyclopentenyl cation (pentamcp(+)) over sapo-18 under real mto reaction conditions, but no carbenium ion was detected over alpo-18. furthermore, analysis of confined organics by c-13 mas nmr and gc-ms clearly demonstrated that higher bronsted acid site density improved the formation and accumulation of some important and reactive hydrocarbon pool species, such as pentamcp(+) and polymethylbenzenes. with the aid of the c-12/c-13-methanol switch technique, the detailed olefin formation mechanism was elucidated. during the mto reaction, light olefin generation over sapo-18 mainly followed the aromatic-based hydrocarbon pool mechanism; however, the olefin methylation and cracking mechanism accounted for the production of light olefins over alpo-18. |
| WOS标题词 | science & technology ; physical sciences |
| 类目[WOS] | chemistry, physical |
| 研究领域[WOS] | chemistry |
| 关键词[WOS] | to-hydrocarbons reaction ; bronsted acid sites ; catalytic cycle ; carbenium ions ; heptamethylbenzenium cation ; product selectivity ; zeolite h-zsm-5 ; coke formation ; conversion ; hsapo-34 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000340208400056 |
| 公开日期 | 2016-05-09 |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/145564]  |
| 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 |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Natl Engn Lab Methanol Olefins, Dalian 116023, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Jingrun,Li, Jinzhe,Yuan, Cuiyu,et al. Elucidating the olefin formation mechanism in the methanol to olefin reaction over AlPO-18 and SAPO-18[J]. catalysis science & technology,2014,4(9):3268-3277. |
| APA | Chen, Jingrun.,Li, Jinzhe.,Yuan, Cuiyu.,Xu, Shutao.,Wei, Yingxu.,...&Liu, Zhongmin.(2014).Elucidating the olefin formation mechanism in the methanol to olefin reaction over AlPO-18 and SAPO-18.catalysis science & technology,4(9),3268-3277. |
| MLA | Chen, Jingrun,et al."Elucidating the olefin formation mechanism in the methanol to olefin reaction over AlPO-18 and SAPO-18".catalysis science & technology 4.9(2014):3268-3277. |
入库方式： OAI收割
来源：大连化学物理研究所
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