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Preparation method and application of supported sulfided Co-Mo/gamma-Al2O3 bimetallic catalyst

A bimetallic catalyst, sulfurized state technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of long production cycle and low catalytic activity, and achieve short production cycle and catalytic activity. High and usable effect

Inactive Publication Date: 2019-06-18
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the catalytic conversion process of existing coal-related model compounds, the catalytic activity is low and the production cycle is long

Method used

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  • Preparation method and application of supported sulfided Co-Mo/gamma-Al2O3 bimetallic catalyst
  • Preparation method and application of supported sulfided Co-Mo/gamma-Al2O3 bimetallic catalyst
  • Preparation method and application of supported sulfided Co-Mo/gamma-Al2O3 bimetallic catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A Supported Sulfide Co-Mo / γ-Al 2 o 3 Characterization of bimetallic catalysts.

[0026] The prepared supported sulfided Co-Mo / γ-Al 2 o 3 The bimetallic catalyst is placed in an X-ray diffractometer (XRD, Bruker D8ADVANCE) for detection. like figure 1 As shown, the carrier γ-Al was analyzed by XRD 2 o 3 and Co-Mo / γ-Al 2 o 3 Crystal structure characteristics of atoms or molecules within a catalyst. Comparing catalysts and supports, in Co-Mo / γ-Al 2 o 3 In addition to the presence of carrier γ-Al in the catalyst 2 o 3 In addition to its own characteristic peaks (2θ=25.65°, 35.22°, 37.85°, 43.41°, 52.61°, 57.57°, 66.54° and 68.25°), there is also MoO 3 (2θ = 12.76°, 23.50°, 27.33° and 33.75°) and Al 2 (MoO 4 ) 3 (2θ=14.14°, 15.64°, 20.87° and 22.13°). As for the diffraction peak of Co metal was not detected, it may be because the content of Co is less or the dispersion of Co on the surface of the carrier is highly uniform, and the size is less than 3nm, whic...

Embodiment 2

[0030] A Supported Sulfide Co-Mo / γ-Al 2 o 3 The application of bimetallic catalyst, the catalytic conversion operation steps of dibenzyl ether are as follows:

[0031] 1) Mix 1mmol of dibenzyl ether, 20ml of n-hexane and 0.1g of supported sulfided Co-Mo / γ-Al 2 o 3 The bimetallic catalyst was added into a 100ml autoclave.

[0032] 2) At room temperature, use N 2 After replacing the air in the autoclave three times, it was filled with H 2 Make the initial hydrogen pressure in the autoclave be 3MPa.

[0033] 3) Place the high-pressure reaction kettle in a heating furnace at a heating rate of 10°C / min, heat to a reaction temperature of 260°C and maintain the reaction time for 120min.

[0034] 4) After the reaction, the autoclave was cooled to normal temperature, and the obtained product was filtered and analyzed.

Embodiment 3

[0036] A Supported Sulfide Co-Mo / γ-Al 2 o 3 The application of bimetallic catalyst, the catalytic conversion of furan, the operation steps are as follows:

[0037] 1) Mix 1mmol of furan, 20ml of n-hexane and 0.1g of supported sulfided Co-Mo / γ-Al 2 o 3 The bimetallic catalyst was added into a 100ml autoclave.

[0038] 2) At room temperature, use N 2 After replacing the air in the autoclave three times, it was filled with H 2 Make the initial hydrogen pressure in the autoclave be 3MPa.

[0039] 3) Place the high-pressure reaction kettle in a heating furnace at a heating rate of 10°C / min, heat to a reaction temperature of 300°C and maintain the reaction time for 120min.

[0040] 4) After the reaction, the autoclave was cooled to normal temperature, and the obtained product was filtered and analyzed.

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Abstract

The invention discloses a preparation method and application of a supported sulfided Co-Mo / gamma-Al2O3 bimetallic catalyst. The catalyst is prepared by the following steps: absorbing a proper amount of deionized water by using a pipette, dropwise adding the deionized water to a unit mass of gamma-Al2O3, and measuring the water absorption amount of the carrier gamma-Al2O3; then measuring the volumeof the water absorption amount of the unit carrier, adding a certain amount of (NH4)6Mo7O24.4H2O and Co(NO3)2.6H2O, and completely dissolving; slowly adding the dissolved solution into a unit mass ofthe carrier gamma-Al2O3, and standing for 12 h; drying and roasting to obtain an oxidation-state Co-Mo / gamma-Al2O3 bimetallic catalyst; and finally, vulcanizing the oxidation-state catalyst to obtaina sulfided catalyst which is easy to prepare, good in utilization performance and high in catalytic activity, and is used for catalytic removal of heteroatoms in coal-related model compounds such asdibenzyl ether, furan, thiophene and quinoline. The catalyst obtained by the method is used for catalytic conversion of the coal-related model compounds, and has high catalytic activity, good utilization property and short production period.

Description

technical field [0001] The invention relates to the technical field of supported catalysts, in particular to a supported sulfided Co-Mo / γ-Al 2 o 3 Preparation methods and applications of bimetallic catalysts. Background technique [0002] The carrier of the supported catalyst can provide an effective surface and a suitable pore structure, which greatly reduces the sintering and aggregation of the active components, and at the same time enhances the mechanical strength of the catalyst. In addition, the support can also provide additional active centers, and the reactivity of the catalyst can be improved through the strong interaction between the active components and the support. In addition, the sulfidation of supported catalysts has redox functions and acid-base functions, and is more inclined to redox. Metal sulfide catalysts can be in the form of single components and composite sulfides. The active phase of the catalyst in the sulfided state is generally the oxide pre...

Claims

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Application Information

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IPC IPC(8): B01J27/051B01J37/02B01J37/20B01J8/00
Inventor 樊星李国省路瑶王瑞玉赵云鹏王飞魏贤勇
Owner CHINA UNIV OF MINING & TECH
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