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The Publishing Center Science and Practice publishes non-periodicals, as well as the electronic scientific journal Bulletin of Science and Practice.

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Journal Article

期刊文章

In situ H-ZSM-5 Zeolite Deactivation Study in Dimethyl Ether to Hydrocarbons Transformation Reaction  [2021]

Sidorov, A.; Kosivtsov, Yu.; Brovko, R.; Doluda, V.;

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Today, catalytic processes for the synthetic fuel components production are of considerable interest for both scientific and industrial area. The transformation of dimethyl ether into hydrocarbons is one of the possible solutions for the development of a closed hydrocarbon cycle, in connection with which a wide study of this process is an important task of modern catalysis. The transformation of dimethyl ether into hydrocarbons occurs with the formation of heavy polyaromatic hydrocarbons, which are deposited on the surface of active centers, which in turn prevents the further occurrence of chemical processes on their surface. This article presents a study of the deactivation of zeolite H-ZSM-5 by the thermogravimetric method in situ. The results of experiments carried out in the temperature range from to 300 to 400 °C are presented. The accumulation of carbon deposits in the first hour of operation indicates the presence of an induction period due to the formation of the first layer of carbon deposits. Linear decontamination occurs when the first five weight percent of carbon deposits accumulate. Further accumulation of carbon deposits up to eight weight percent leads to a sharp decrease in the rate of conversion of dimethyl ether into hydrocarbons to 0.08 kg (DME) / (kg (Cat) h). In the first hour of operation, aromatic hydrocarbons predominate in the reaction medium; with increasing time, the concentration of aromatic hydrocarbons decreases, and the conc
entration of light olefins and alkanes increases due to carbonization of the catalyst surface. The concentration of heavy aromatic hydrocarbons with a number of carbon atoms equal to or greater than eleven has a maximum after 240 minutes of reaction. The decrease in the content of heavy aromatic hydrocarbons after 240 minutes of reaction can be explained by the sharp loss of surface acidity due to carbonation.
来自期刊
Bulletin of Science and Practice

书目信息

语言:
English
类型:
Journal Article
自何时收录于AGRIS:
2021
卷:
7
期:
10
范围:
10-16
出版者:
Publishing Center Science and Practice
所有题名:
"In situ H-ZSM-5 Zeolite Deactivation Study in Dimethyl Ether to Hydrocarbons Transformation Reaction"@eng
"Изучение дезактивации цеолита H-ZSM-5 в процессе трансформации диметилового эфира в углеводороды в условиях in situ"@rus
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书目信息

语言:
English
类型:
Journal Article
自何时收录于AGRIS:
2021
卷:
7
期:
10
范围:
10-16
出版者:
Publishing Center Science and Practice
所有题名:
"In situ H-ZSM-5 Zeolite Deactivation Study in Dimethyl Ether to Hydrocarbons Transformation Reaction"@eng
"Изучение дезактивации цеолита H-ZSM-5 в процессе трансформации диметилового эфира в углеводороды в условиях in situ"@rus