Deactivation features of gallium-containing zeolites in the propane aromatization process
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- 作者：L. N. Vosmerikova ; V. I. Zaikovskii ; A. N. Volynkina…
- 关键词：propane ; aromatic hydrocarbons ; zeolite ; conversion ; activity ; selectivity ; coke ; carbon deposits
- 刊名：Petroleum Chemistry
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：57
- 期：1
- 页码：85-92
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Industrial Chemistry/Chemical Engineering;
- 出版者：Pleiades Publishing
- ISSN：1555-6239
- 卷排序：57
文摘
Conversion of propane to aromatic hydrocarbons on Ga-containing zeolite catalysts prepared by various methods has been examined, and their comparative stability against deactivation has been analyzed. It has been shown that the Ga-containing zeolite catalysts exhibit high activity and stability in propane conversion to aromatic hydrocarbons. Specific features of the formation of carbon deposits on the surface of Ga-containing zeolites in the propane aromatization reaction have been revealed using the techniques of temperature-programmed desorption of ammonia, low-temperature adsorption of nitrogen, differential thermal analysis, high-resolution transmission electron microscopy, and characteristic X-ray spectroscopy radiation. It has been found that the coke deposited on the catalyst has an almost homogeneous structure and is characterized by relatively low degree of polycondensation.