A kind of molybdenum disulfide catalyst rich in defect 1t-2h mixed phase and its preparation method and application

A 1T-2H, molybdenum disulfide technology, used in the synthesis of materials and catalytic applications, to achieve high stability, avoid high-temperature roasting, and high hydrodesulfurization activity

Active Publication Date: 2021-07-13
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above methods are used alone to synthesize 1T / 2H phase molybdenum disulfide or molybdenum disulfide materials containing defects, while the 1T-2H mixed phase of molybdenum disulfide and defects are combined and applied to the research and development of catalytic hydrodesulfurization reactions. Application not yet reported

Method used

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  • A kind of molybdenum disulfide catalyst rich in defect 1t-2h mixed phase and its preparation method and application
  • A kind of molybdenum disulfide catalyst rich in defect 1t-2h mixed phase and its preparation method and application
  • A kind of molybdenum disulfide catalyst rich in defect 1t-2h mixed phase and its preparation method and application

Examples

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Effect test

Embodiment 1

[0041] Take thiourea (4g), ammonium heptamolybdate tetrahydrate (0.989g) and anhydrous oxalic acid (0.504g) and dissolve in 40ml of ultrapure water, stir until dissolving to obtain the first mixture, wherein the concentration of molybdenum is 0.14mol / L, the molar ratio of sulfur to molybdenum is 9:1, and the molar ratio of anhydrous oxalic acid to molybdenum is 1:1. Add 40ml of ethanol, stir well at room temperature, and mix well to obtain the second mixture, wherein the volume ratio of water in the first mixture to ethanol in the second mixture is 1:1. Then move it into a crystallization kettle for crystallization, the crystallization temperature is 200°C, and the crystallization time is 12h. After crystallization, the supernatant was removed by filtration, washed alternately with deionized water and ethanol four times, and the precipitate was fully dried at 60°C under vacuum for 12 hours to obtain MoS 2 catalyst.

Embodiment 2

[0043] On the basis of Example 1, the addition of ethanol is 60ml, the addition of water is 20ml, the volume ratio of water and ethanol is 1:3, and the rest of the preparation steps are the same as in Example 1.

Embodiment 3

[0045] On the basis of Example 1, the amount of ethanol added is 20ml, the amount of water added is 60ml, the volume ratio of water to ethanol is 3:1, and the rest of the preparation steps are the same as in Example 1.

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Abstract

The invention discloses a defect-rich 1T-2H mixed phase molybdenum disulfide catalyst, which has a mixed structure of 1T phase and 2H phase, its surface lattice stripes are discontinuous and have deformation and dislocation, and defects exist on crystal edges and basal planes. The invention also discloses the preparation method and application of the catalyst. Based on a hydrothermal synthesis method, the invention uses a mixed solvent of water and ethanol and an organic acid as a regulator to synthesize a molybdenum disulfide catalyst with a defect-rich 1T-2H mixed phase. The catalyst has high catalytic activity, high stability and high indirect desulfurization selectivity in catalytic hydrodesulfurization reaction. Compared with the addition of ethanol and anhydrous oxalic acid alone, molybdenum disulfide synthesized under the joint control of appropriate amount of ethanol and anhydrous oxalic acid has the best hydrodesulfurization performance, not only has high catalytic activity and high indirect desulfurization selectivity, but also Has high stability. At the same time, the preparation method of the catalyst is simple and easy, the conditions are easy to control, and cumbersome processes such as secondary hydrothermal and high-temperature roasting are avoided.

Description

technical field [0001] The invention belongs to the field of material synthesis and catalytic application, in particular to the preparation of a high-performance hydrodesulfurization catalyst, especially a defect-rich 1T-2H mixed phase molybdenum disulfide catalyst with high activity, high stability and high indirect desulfurization selectivity and use. Background technique [0002] Sulfur-containing compounds in oil not only produce SO that pollutes the atmosphere during combustion 2 , which also corrodes the components of the engine, etc., so it needs to be removed. my country's No. 3 Jet Fuel Standard (GB 6537-2018) requires that the total sulfur content shall not exceed 0.2%, and the National VI Standards for vehicle gasoline and diesel (GB 17930-2016, GB 19147-2016) require that the sulfur content shall not exceed 10mg / kg. This puts forward higher requirements for the desulfurization technology of my country's oil refining enterprises. [0003] Hydrodesulfurization i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/051B01J35/02B01J37/10C10G45/04C07C7/163C07C9/15C07D333/76C07C1/32C07C15/14
CPCB01J27/051B01J35/026B01J37/10C07C1/322C07C7/163C07D333/76C10G45/04C10G2300/202C07C9/15C07C15/14
Inventor 李国柱张香文曹宏伟王庆法
Owner TIANJIN UNIV
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