Method for preparing synthetic natural gas low-ruthenium methanation catalyst

A technology for synthesizing natural gas and ruthenium catalysts, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems that limit the application of catalysts, and achieve economic feasibility, simple preparation process, and large specific surface area Effect

Inactive Publication Date: 2013-12-25
大连瑞克科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ruthenium is a noble metal, too high Ru loading will limit the application of catalysts in large-scale synthetic natural gas industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 3.79 g of n-butyl titanate in absolute ethanol was diluted with absolute ethanol to 7 ml. Add 7 grams of γ-alumina to the solution to fully infiltrate it, keep stirring until there is no remaining liquid, and place it at room temperature for 5 hours. Dry at 120°C for 2 hours. Calcined at 450°C for 2 hours in a muffle furnace to obtain TiO 2 / Al 2 o 3 carrier. Take RuCl 3 0.0945 g is prepared into an appropriate amount of 7 ml of aqueous solution (determined according to the amount of water absorption), impregnated with the equal-volume impregnation method, left to dry at room temperature for 5 hours, dried at 120°C for 12 hours, roasted at 300°C for 2 hours, sealed and stored , to obtain ruthenium catalyst sample 1.

Embodiment 2

[0017] 2.48 g of n-butyl titanate in absolute ethanol was diluted with absolute ethanol to 7 ml. Pour 7 grams of γ-alumina into the solution for full infiltration, keep stirring until there is no remaining liquid, and place it for 5 hours for hydrolysis. Dry at 120°C for 2 hours. Calcined at 450°C for 2 hours in a muffle furnace to obtain TiO 2 / Al 2 o 3 carrier. Take RuCl 3 0.0945 g is prepared into an appropriate amount of 7 ml of aqueous solution (determined according to the amount of water absorption), impregnated with the equal-volume impregnation method, left to dry at room temperature for 5 hours, dried at 120°C for 12 hours, roasted at 300°C for 2 hours, sealed and stored , to obtain ruthenium catalyst sample 2.

Embodiment 3

[0019] 1.21 g of n-butyl titanate in absolute ethanol was diluted with absolute ethanol to 7 ml. Add 7 grams of γ-alumina to the solution to fully infiltrate it, keep stirring until there is no remaining liquid, and keep it at room temperature for 5 hours. Dry at 120°C for 2 hours. Calcined at 450°C for 2 hours in a muffle furnace to obtain TiO 2 / Al 2 o 3 carrier. Take RuCl 3 0.0945 g is prepared into an appropriate amount of 7 ml of aqueous solution (determined according to the water absorption), impregnated by equal volume method, left to dry at room temperature for 5 hours, dried at 120°C for 12 hours, roasted at 300°C for 2 hours, sealed and stored. Ruthenium catalyst sample 3 was obtained.

[0020] Gained ruthenium catalyst is evaluated according to the following conditions: reactor internal diameter 10mm, ruthenium catalyst loading 3ml. Both ends are filled with quartz sand.

[0021] Reduction conditions: 30% H at room temperature 2 / N 2 , at an airspeed of ...

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PUM

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Abstract

The invention discloses a method for preparing a synthetic natural gas low-ruthenium methanation catalyst, and belongs to the field of catalysts and fine chemical engineering. According to the method, gamma-type aluminum oxide is infiltrated by the solution of soluble titanium compounds, dried and roasted to obtain composite support TiO2/Al2o3, and is then impregnated in the solution of soluble ruthenium compounds in an equivalent-volume impregnation mode, the obtained impregnant is dried and roasted to obtain the synthetic natural gas low-ruthenium methanation catalyst, and the carrying capacity of Ru is 0.3-2.0% by weight. The prepared Ru/TiO2-Al2O3 catalyst gets a good result in a CO methanation reaction evaluation. The synthetic natural gas low-ruthenium methanation catalyst has big specific surface area, is high in catalytic activity,low in sensibility to poisons, good in stability, low in starting temperature, simple in preparation process, feasible economically and used for the inlet of a synthetic natural gas one-stage methanator, can reduce synthetic natural gas preheating temperature, and reduces heat energy consumption.

Description

technical field [0001] The invention relates to a preparation method of a low-ruthenium catalyst for methanation of synthetic natural gas, belonging to the field of catalysts and fine chemicals. Background technique [0002] Natural gas has the advantages of large calorific value, complete combustion, no smoke and no slag, and is favored as a clean fuel, and its proportion in my country's energy consumption structure is increasing year by year. my country is a country rich in coal, little in oil and gas. To develop the natural gas industry, the rich coal resources in the west and north are converted into natural gas and transported to the economically developed areas in the southeast. It has become a major measure to promote my country's economic development. CO hydrogenation to methane is an important step in the production of natural gas from coal, and the preparation of high-performance methanation catalysts is a key technology that affects production costs. The catalyst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/46B01J37/02C10L3/08
Inventor 周焕文邓少亮
Owner 大连瑞克科技股份有限公司
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