Preparation method for carbon-supported monolayer molybdenum disulfide composite catalyst for low-temperature hydro-conversion of carbonyl sulfide

A single-layer molybdenum disulfide and composite catalyst technology is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., which can solve problems such as high reaction temperature, high energy consumption, and poor desulfurization performance, and achieve The preparation process is simple, the catalytic activity is stable, and the desulfurization precision is high.

Inactive Publication Date: 2016-07-20
DALIAN UNIV OF TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] Chinese patent, publication number: CN101690866A, introduces a method based on Mo-Ni-P-O / γ-Al 2 o 3 Catalyst (Chinese patent CN100435950C preparation method) and activated carbon supported Cu (NO 3 ) 2 or Fe(NO 3 ) 3 Catalyst (Chinese patent CN101352653A preparation method) method (reactor) for removing carbonyl sulfide in yellow phosphorus tail gas, the process reaction temperature is high, it needs to be heated to 300-450 °C, and the energy consumption is high
However, the low-temperature hydrodesulfurization performance is poor, and the desulfurization rate is only 23.7% at 230 °C

Method used

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  • Preparation method for carbon-supported monolayer molybdenum disulfide composite catalyst for low-temperature hydro-conversion of carbonyl sulfide
  • Preparation method for carbon-supported monolayer molybdenum disulfide composite catalyst for low-temperature hydro-conversion of carbonyl sulfide
  • Preparation method for carbon-supported monolayer molybdenum disulfide composite catalyst for low-temperature hydro-conversion of carbonyl sulfide

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Embodiment 1

[0046] Such as figure 1 As shown, the present invention "a method for preparing a carbon-supported single-layer molybdenum disulfide composite catalyst for low-temperature hydrogenation conversion of carbonyl sulfide", the specific preparation process is as follows:

[0047] (1) Cetyltrimethylammonium bromide is dispersed in 100mL of deionized water to obtain a 0.01mol / L cetyltrimethylammonium bromide dispersion;

[0048] (2) 200mg of graphene oxide nanobelts were placed into the above-mentioned surfactant solution, and stirred at 40° C. for 12 hours;

[0049] (3) Ammonium tetrathiomolybdate is added in the mixed solution, the mass ratio of ammonium tetrathiomolybdate and graphene oxide nanobelt used is 1:0.83, stir well, add 10mL hydrazine hydrate liquid phase reduction for 6 hours, Suction filtration, washing with water and ethanol, and drying to obtain molybdenum disulfide-residual surfactant-graphene nanoribbon composite material;

[0050] (4) Put the molybdenum disulfid...

specific Embodiment approach

[0053] Compared with the monolayer molybdenum disulfide and graphene nanobelt composite hydrodesulfurization catalyst (SMGR-1) in Example 1, a few-layer molybdenum disulfide and graphene nanobelt composite hydrodesulfurization catalyst, multilayer pure Molybdenum disulfide hydrodesulfurization catalyst and single graphene nanoribbons were used as comparative samples. The specific implementation method: (1) ammonium tetrathiomolybdate is added in the graphene oxide nanobelt, the mass ratio of ammonium tetrathiomolybdate and the graphene oxide nanobelt is 1:0.3, stir evenly, add hydrazine hydrate Liquid phase reduction for 6 hours, suction filtration, washing with water and ethanol, and drying to obtain the molybdenum disulfide-graphene nanoribbon composite material, the molybdenum disulfide-graphene nanoribbon composite material is placed in a tube furnace, protected by nitrogen A high-temperature annealing at 700°C for 2 hours was performed, and after natural cooling down to r...

Embodiment 2

[0058] Such as figure 1 As shown, the present invention "a method for preparing a carbon-supported single-layer molybdenum disulfide composite catalyst for low-temperature hydrogenation conversion of carbonyl sulfide", the specific preparation process is as follows:

[0059] (1) Octadecyltrimethylammonium bromide is dispersed in 100mL deionized water to obtain a 0.1mol / L octadecyltrimethylammonium bromide dispersion;

[0060] (2) 250mg of graphene oxide nanobelts were placed into the above-mentioned surfactant solution, and stirred at 40°C for 24 hours;

[0061] (3) Ammonium tetrathiomolybdate is added in the mixed solution, the mass ratio of ammonium tetrathiomolybdate and graphene oxide nanobelt used is 1:0.36, stir evenly, add 10mL hydrazine hydrate liquid phase reduction for 6 hours, Suction filtration, washing with water and ethanol, and drying to obtain molybdenum disulfide-residual surfactant-graphene nanoribbon composite material;

[0062](4) Place the molybdenum dis...

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Abstract

The invention provides a preparation method for carbon-supported monolayer molybdenum disulfide composite catalyst for low-temperature hydro-conversion of carbonyl sulfide, which belongs to the technical field of functional catalytic material preparation and environment-friendly catalytic application. Ammonium tetrathiomolybdate is uniformly dispersed on a surfactant-modified appropriate carbon source, and hydrazine hydrate liquid-phase reduction and high-temperature treatment are then performed, so that the carbon-supported monolayer molybdenum disulfide composite material is obtained. In the material, monolayer molybdenum disulfide uniformly grows on the surface of carbon support, the material shows property rich in defective and active sites, and shows excellent activity in catalytic conversion of carbonyl sulfide by hydrogenation, and the catalytic performance is stable. The preparation method is easy to operate, the cost is low, the temperature of catalysis is low, the accuracy of catalysis is high, the stability is good, and the invention has good economic benefit and industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of functional catalytic material preparation and environment-friendly catalytic application, and in particular relates to a preparation method of a carbon-loaded single-layer molybdenum disulfide composite catalyst for low-temperature hydrogenation conversion of carbonyl sulfide. Background technique [0002] The distribution of energy resources in my country is characterized by rich coal and poor oil. Coal accounts for more than 70% of the primary energy. The serious environmental pollution caused by the extensive use of coal has aroused increasing public attention. In recent years, people have increasingly realized that the clean and efficient utilization of coal is the only way for my country's healthy development. The synthesis of various fuel oils and fine chemicals based on coal conversion gas as raw material has become an important development direction of coal chemical industry. However, coal-to-gas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051
CPCB01J27/051
Inventor 王旭珍杨澜刘洋刘宁邱介山
Owner DALIAN UNIV OF TECH
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