Catalytic Synthesis of ?2-?4-Alkenes from Dimethyl Ether
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International Journal of Engineering Trends and Technology (IJETT) |  |
| © 2021 by IJETT Journal | ||
| Volume-69 Issue-4 |
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| Year of Publication : 2021 | ||
| Authors : Shuxrat Chorievich Aslanov, Abdurazzoq Qobilovich Buxorov, Normurot Ibodullaevich Fayzullayev |
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| DOI : 10.14445/22315381/IJETT-V69I4P210 |
Citation
MLA Style: Shuxrat Chorievich Aslanov, Abdurazzoq Qobilovich Buxorov, Normurot Ibodullaevich Fayzullayev "Catalytic Synthesis of ?2-?4-Alkenes from Dimethyl Ether" International Journal of Engineering Trends and Technology 69.4(2021):67-75.
APA Style:Shuxrat Chorievich Aslanov, Abdurazzoq Qobilovich Buxorov, Normurot Ibodullaevich Fayzullayev. Catalytic Synthesis of ?2-?4-Alkenes from Dimethyl Ether International Journal of Engineering Trends and Technology, 69(4),67-75.
Abstract
In the study, the effect of the volumetric velocity of the initial gaseous mixture on the catalytic properties of Zn-Zr-Cu*HSZ*Al2O3 in the conversion of dimethyl ether to olefins was studied. When the volumetric rate is increased by 5 times, the conversion of dimethyl ether decreases from 96.5 to 40.7%, the total selectivity for C2 = - C4 = olefins decreases from 59.0 to 75.5 mas.%, at the same time, the yield of the by-products of the reaction - C2 + paraffin is reduced. A decrease in the reaction temperature at the equal conversion of dimethyl ether leads to an increase in selectivity for both ethylene and propylene due to a decrease in the formation of methane and C2 + paraffin in the reaction products. Thus, in copper-containing zeolite catalysts, lower olefins than dimethyl ether provide higher conversion of raw material and higher selectivity of olefin formation (up to 90 mas. %.). Also, changing the initial raw material composition and regime parameters allows a significant change in the ratio of olefins to each other. To study the primary intermediates of the formation of olefins from dimethyl ether, i.e., the conversion of the C-O bond to the primary C-C bond, the copper-storage catalyst was tested at atmospheric pressure and dimethyl ether conversion at 240 ? for the homologation reaction of methanol. The data set obtained to the prospects of the catalytic system Zn-Zr-Cu*HSZ*Al2O3 modified with copper compounds. The selectivity for olefins reaches 87-90%.
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Keywords
dimethyl ether, C2-C4-alkenes, catalyst, selectivity, reaction yield.