Sulfuration type hydrodesulfurization catalyst as well as preparation method and application thereof

Abstract

The invention provides a sulfuration type hydrodesulfurization catalyst and a preparation method and application thereof. The catalyst comprises a carrier, active metal and auxiliary metal. The preparation method comprises the following steps: 1, adding a compound containing the active metal and a sulfurizing agent into a first solvent, and carrying out heating reflux to obtain active metal sulfide; and 2, dispersing the active metal sulfide on the carrier, then dipping the carrier in a compound solution containing the auxiliary metal, and carrying out roasting to obtain the sulfuration type hydrodesulfurization catalyst. According to the invention, the catalyst obtained by the method can be directly used for hydrodesulfurization of oil product without a sulfuration process, and strong interaction between the active metal and the carrier can be avoided; and the active metal in the prepared catalyst has high sulfuration degree and high dispersion degree, so the catalyst has high removal activity for thiophene sulfur-containing compounds.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a sulfurized hydrogenation desulfurization catalyst and its preparation method and application. Background technique [0002] With the development of the national economy, the production, sales and ownership of automobiles in our country have increased rapidly since the beginning of the new century, and the environmental pollution problems caused by this have become increasingly serious. For this reason, my country has formulated more stringent standards for motor gasoline, especially strict restrictions on the sulfur content in it. Therefore, the production of ultra-clean gasoline has become an inevitable trend in the gasoline processing industry. Hydrodesulfurization technology is the main means of producing ultra-clean gasoline, and the development of highly active hydrodesulfurization catalysts is the key to realize efficient hydrodesulfurization process. [0003] Hydrodesul...

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Problems solved by technology

This method effectively avoids the strong interaction between the active metal and the carrier, and improves the sulfidation degree of the active metal. However, due to the weak interaction between the active metal and the carrier, it is easy to cause the aggregation of the active metal during the roasting process, resulting in the utilization of the active metal. The rate is low, which is not conducive to the improvement of catalyst hydrodesulfurization activity

[0006] In order to improve the active metal dispersion of hydrodesulfurization catalyst prepared using thiomolybdenum (tungstate) salt as precursor, Alonso et al. (G Alonso, G Berhaul, A Aguilar, V Collins, C Ornelas, S Fuentes, R Chianelli. Characterization and HDS activity of mesoporous MoS 2 Catalysts prepared by in situ activation of tetraalkylammonium thiomolybdates.Journal of Catalysis, 2002,208(2):359-369) promote the dispersion of active metals by adding chelating agent in thiomolybdenum (tungstate) salt, and improve the dispersion of active metals degree, but the addition of chelating agent will cause incomplete decomposition of thiomolybdenum (tungstate) salt and generate Mo(W)S 3 , which reduces the utilization rate of active metals and limits the improvement of catalyst hydrodesulfurization activity

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