Synthesis of dispersed molybdenum disulfide nano-catalysts and their performance in the hydrogenation of simulated oil slurry

GUO Ai-jun; PAN Hui-hui; ZHENG Wen-lin; JIAO Shou-hui; WANG Feng; JIN Zheng-zheng; LIU He; CHEN Kun; WANG Zong-xian

Volume 47 Issue 5

May 2019

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Article Navigation > Journal of Fuel Chemistry and Technology > 2019 > 47(5): 629-640

GUO Ai-jun, PAN Hui-hui, ZHENG Wen-lin, JIAO Shou-hui, WANG Feng, JIN Zheng-zheng, LIU He, CHEN Kun, WANG Zong-xian. Synthesis of dispersed molybdenum disulfide nano-catalysts and their performance in the hydrogenation of simulated oil slurry[J]. Journal of Fuel Chemistry and Technology, 2019, 47(5): 629-640.

Citation:

GUO Ai-jun, PAN Hui-hui, ZHENG Wen-lin, JIAO Shou-hui, WANG Feng, JIN Zheng-zheng, LIU He, CHEN Kun, WANG Zong-xian. Synthesis of dispersed molybdenum disulfide nano-catalysts and their performance in the hydrogenation of simulated oil slurry[J]. Journal of Fuel Chemistry and Technology, 2019, 47(5): 629-640.

Citation:

GUO Ai-jun, PAN Hui-hui, ZHENG Wen-lin, JIAO Shou-hui, WANG Feng, JIN Zheng-zheng, LIU He, CHEN Kun, WANG Zong-xian. Synthesis of dispersed molybdenum disulfide nano-catalysts and their performance in the hydrogenation of simulated oil slurry[J]. Journal of Fuel Chemistry and Technology, 2019, 47(5): 629-640.

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Synthesis of dispersed molybdenum disulfide nano-catalysts and their performance in the hydrogenation of simulated oil slurry

State Key Laboratory of Heavy Oil, College of Chemical Engineering, China University of Petroleum(East China), Qingdao 266580, China

Funds:

The project was supported by the National Natural Science Foundation of China 21776313

Provincial Key Research and Development Plan of Shandong 2017GGX70108

State Key Laboratory of Heavy Oil Processing SLKZZ-2017011

Received Date: 2019-01-04
Rev Recd Date: 2019-03-04

Available Online: 2021-01-23

Publish Date: 2019-05-10

Abstract

Abstract

A series of dispersed nano molybdenum disulfide (MoS₂) catalysts were prepared with molybdenum dialkyl dithiocarbamate (Mo-DTC) and molybdenum hexacarbonyl (Mo(CO)₆) as the precursors by hydrothermal methods and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and temperature programmed desorption (NH₃-TPD). By using a simulated oil slurry containing three kinds of olefins (octane, styrene and trans-dibenzylethene), benzothiophene and anthracene, the catalytic performance of nano MoS₂ in the hydrogenation was investigated, with the help of gas chromatography-mass spectrometry (GC-MS). The results indicate that all the prepared catalysts are in the form of 2H-MoS₂; however, their crystallinity, particle size, vulcanization degree, and acid property are influenced by the pretreatment conditions; the preferred vulcanization conditions for the Mo-DTC-and Mo(CO)₆-based MoS₂ catalysts are 380 ℃/30 min and 370 ℃/30 min, respectively, to achieve a relatively high activity in the hydrogenation of olefins and benzothiophene. Over the Mo-DTC-based nano-MoS₂ catalyst, the saturation conversion of olefins hydrogenation is 98.10% and the hydrodesulfurization rate is 94.51%, whereas the saturation conversion of anthracene hydrogenation is 29.47%, without forming octahydroanthracene (8HN) or perhydroanthracene. In contrast, the activity of Mo(CO)₆-based nano-MoS₂ catalyst is slightly lower, with the saturation conversion of olefins hydrogenation being 94.01% and the hydrodesulfurization rate being 89.01%; similarly, the saturation conversion for anthracene hydrogenation is 24.20%, without 8HN or perhydroanthracene in the product. As a whole, in comparison with the Mo(CO)₆-based MoS₂ catalyst, the nano MoS₂ catalyst derived from Mo-DTC displays higher efficiency in both olefins saturation and sulfur-containing compounds desulfurization, and low degree hydrogenation of aromatic hydrocarbons; moreover, it also exhibits higher hydro-treating selectivity for the catalytic cracking slurry and higher stability during hydrogenation.
- nano-MoS₂,
- hydrodesulfurization,
- olefin saturation,
- anthracene,
- benzothiophene

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References(34)

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