NDLI: Methanol to olefins conversion over silicoaluminophosphates with AEI structure: Effect of the active site type

Content Provider	Springer Nature Link
Author	Kasnerik, V. I. Konv, S. V. Dobryakova, I. V. Ivav, A. O. Knyazeva, E. E. Ivava, I. I.
Copyright Year	2016
Abstract	Effect of the type of active site on the catalytic properties of microporous crystalline silicoaluminophosphates with AEI structure synthesized at 150, 170, and 190°C has been investigated. The state of the active site was changed by varying the catalyst synthesis conditions. It has been established that during the synthesis of silicoaluminophosphates with the AEI structure from the reaction mixture of the same composition, an increase in the temperature and crystallization time leads to an increase of the silicon content and crystal size growth. The observed changes in the physicochemical properties are accompanied by the change of the silicon state in the structure of silicoaluminophosphates with the predominant formation of silicon “islands” via the SM3 mechanism. According to $^{29}$Si NMR data, the formation of active sites of silicoaluminophosphates via the SM2 mechanism in the form of isolated silicon atoms in the structure is also observed for these materials. The presence of such sites, along with the morphological features of the crystals, determines the unusual catalytic properties of silicoaluminophosphate with AEI structure in MTO process, which are a high ethylene yield up to 41 wt % at an ethylene: propylene molar ratio of 1: 6.
Starting Page	217
Ending Page	223
Page Count	7
File Format	PDF
ISSN	09655441
Journal	Petroleum Chemistry
Volume Number	56
Issue Number	3
e-ISSN	15556239
Language	English
Publisher	Pleiades Publishing
Publisher Date	2016-05-22
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	silicoaluminophosphates morphological features acid properties type of active site conversion of methanol into olefins Industrial Chemistry/Chemical Engineering
Content Type	Text
Resource Type	Article
Subject	Chemistry Geochemistry and Petrology Fuel Technology Chemical Engineering Energy Engineering and Power Technology

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