Coking process of catalyst based on in-situ diffuse FT-IR spectroscopy in reaction of methanol to propene

被引：0

作者：

Tang, Yueqi ^{[1
]}

Yu, Xianbo ^{[1
]}

Wang, Jingdai ^{[1
]}

Yang, Yongrong ^{[1
]}

机构：

[1] State Key Laboratory of Chemical Engineering, Department of Chemical and Biochemical Engineering, Zhejiang University

来源：

Shiyou Xuebao, Shiyou Jiagong/Acta Petrolei Sinica (Petroleum Processing Section) | 2012年 / 28卷 / 04期

关键词：

Coke deposition; In situ DRIFTS; Methanol to propene; Modified catalyst;

D O I：

10.3969/j.issn.1001-8719.2012.04.013

中图分类号：

学科分类号：

摘要：

Based on the mechanism that the chemical substance adsorbed on catalyst surface can produce infrared signals, the method of in situ diffuse reflectance infrared Fourier transform spectroscopy (in situ DRIFTS) was used to study the behavior of catalyst coking in the reaction of methanol to propene (MTP). The coke processes of four different ZSM-5 catalysts during MTP reaction at different temperatures were investigated. The results showed that the percentage of polycyclic aromatic hydrocarbons in the coke on catalyst increased with the increases of reaction temperature and time. Phosphorus-modification and hydro-thermal treatment could change the pore structure and acid sites of ZSM-5 catalyst, so both the species of coke deposition on the modified ZSM-5 catalyst and the percentage of polycyclic aromatic hydrocarbons in coke increased under the same MTP reaction conditions. In addition, the higher the acidity of strong acid site of catalyst, the more the amount of coke deposition and the faster the coking speed at the latter stage of reaction.

引用

页码：605 / 611

页数：6

共 26 条

[1]

Dehertog W.J.H., Froment G.F., Production of light alkenes from methanol on ZSM-5 catalysis, Applied Catalysis, 71, 1, pp. 153-165, (1991)

[2]

Zhao Y., Jing Z., Advances of MTO technology, Petroleum Processing and Petrochemicals, 30, 2, pp. 23-28, (1999)

[3]

Mores D., Kornatowski J., Olsbye U., Et al., Coke formation during the methanol-to-olefin conversion: In situ microspectroscopy on individual H-ZSM-5 crystals with different Brönsted acidity, Chemistry-A European Journal, 17, 10, pp. 2874-2884, (2011)

[4]

Wragg D.S., Johnsen R.E., Balasundaram M., Et al., SAPO-34 methanol-to-olefin catalysts under working conditions: A combined in situ powder X-ray diffraction, mass spectrometry and Raman study, Journal of Catalysis, 268, 2, pp. 290-296, (2009)

[5]

Zhu N., Wang Y., Chen F., Et al., Application of in situ FTIR to deactivation by coke deposition, Progress in Chemistry, 20, 10, pp. 1447-1452, (2008)

[6]

Wen P., Mei C., Liu H., Et al., Deactivation of ZSM-5 catalysts during methanol-to-propylene process, Acta Petrolei Sinica (Petroleum Processing Section), 24, 4, pp. 446-450, (2008)

[7]

Mao D., Guo Q., Lu G., Effects of crystal size and phosphorus modification of ZSM-5 zeolite on its catalytic performance in the conversion of methanol to propylene, Acta Petrolei Sinica (Petroleum Processing Section), 25, 4, pp. 503-508, (2009)

[8]

Palumbo L., Bonino F., Beato P., Et al., Conversion of methanol to hydrocarbons: Spectroscopic characterization of carbonaceous species formed over H-ZSM-5, Journal of Physical Chemistry C, 112, 26, pp. 9710-9716, (2008)

[9]

Wu X.C., Abraha M.G., Anthony R.G., Methanol conversion on SAPO-34: Reaction condition for fixed-bed reactor, Applied Catalysis A: General, 260, 1, pp. 63-69, (2004)

[10]

Park J.W., Seo G., IR study on methanol-to-olefin reaction over zeolites with different pore structures and acidities, Applied Catalysis A: General, 356, 2, pp. 180-188, (2009)

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