Catalyzer for preparing synthetic gas from natural gas partial oxidation and its preparation method

A synthesis gas and natural gas technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve the problem of catalyst sintering, poor thermal conductivity and thermal stability, deactivation and other problems, to achieve the effects of high thermal stability, high selectivity and high methane conversion rate

Inactive Publication Date: 2004-11-10
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

We know that the oxide carrier has the defects of poor thermal conductivity and thermal stability, so during the reaction process, due to the inability to diffuse the heat of reaction in time, a "hot spot" is formed, which can lead to sintering and "deactivation" of the catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Dissolve 1 g of nickel nitrate in 10 ml of absolute ethanol to prepare a 10% nickel nitrate alcohol solution. Then take 3 grams than the surface is 20m 2 / g of silicon carbide powder, disperse the silicon carbide powder in the nickel nitrate alcohol solution at 20°C under stirring conditions, and stir for 3 hours. After drying at 80°C and then roasting in a muffle furnace at 600°C for 3 hours, a catalyst for preparing synthesis gas by partial oxidation of natural gas with a loading of nickel oxide of 8.5% can be obtained.

[0022] The evaluation test of the catalyst was carried out in a fixed bed reactor, the molar ratio of methane and oxygen was 2:1, and the space velocity was 40000. Among them, under the condition of 700°C, the conversion rate of methane is 80%, and the selectivities of carbon monoxide and hydrogen are 93% and 91%, respectively.

Embodiment 2

[0024] Dissolve 0.1 g of nickel acetate in 10 ml of distilled water to prepare a 1% aqueous solution of nickel acetate; then take 0.02 g of cerium nitrate and dissolve it in 2 ml of water to prepare a 1% aqueous solution of cerium nitrate; then mix the two. Take 0.2 gram specific surface as 40m 2 / g of silicon carbide powder, disperse the silicon carbide powder in the mixed solution at 40°C under stirring conditions, and stir for 6 hours. The pH value of the solution is adjusted with ammonia water, so that nickel and cerium in the solution form co-precipitation and deposit on the surface of silicon carbide. The samples were then dried at 100°C. Then put it into a muffle furnace and bake at 700° C. for 2 hours to obtain a catalyst for preparing synthesis gas by partial oxidation of natural gas with a loading of nickel oxide of 12.7% and a loading of cerium oxide of 3.3%. The evaluation test of the catalyst was carried out in a fixed bed reactor, the molar ratio of methane and...

Embodiment 3

[0026] Dissolve 0.1 g of nickel acetate in 10 ml of distilled water to prepare a 1% aqueous solution of nickel acetate; then take 0.02 g of cerium acetate and dissolve it in 2 ml of water to prepare a 1% aqueous solution of cerium nitrate. Take 0.2 gram specific surface as 60m 2 / g of silicon carbide powder, disperse the silicon carbide powder in the nickel acetate solution at 60°C under stirring conditions, and stir for 6 hours. The samples were then dried at 100°C. Then add the dried sample into the prepared cerium nitrate solution under stirring condition, and stir for 1 hour. After drying at 140°C, put it into a muffle furnace and bake at 700°C for 1 hour to obtain a catalyst for preparing synthesis gas by partial oxidation of natural gas with a loading of nickel oxide of 12.7% and a loading of cerium oxide of 3.3%. The evaluation test of the catalyst was carried out in a fixed bed reactor, the molar ratio of methane and oxygen was 2:1, and the space velocity was 40000. ...

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Abstract

A catalyst for synthetic gas preparation through partial natural gas oxidation, whose percentage by weight is nickel oxide 6-25%, rare-earth oxide 0-6%, silicon carbide 69-94%, they catalyst is prepared through the steps of, dissolving soluble metallic nickel salt or the mixture of metallic nickel salt and rare-earth metal salt into distilled water or ethanol solvent, immersing the silicon carbide with high specific surface area into the solution, wherein metal salt is deposited on the carbonization silicon face, and catalyst is obtained through roasting.

Description

Technical field: [0001] The invention belongs to a catalyst and a preparation method thereof, in particular to a catalyst for preparing synthesis gas by partial oxidation of natural gas and a preparation method thereof. Background technique: [0002] my country is rich in natural gas resources, mainly concentrated in the relatively backward western regions. As an important energy source, natural gas is clean and environmentally friendly, but there are many inconveniences in the use and transportation of natural gas, which limits the application of natural gas in energy and other fields. Therefore, how to effectively develop and utilize natural gas resources and convert them into high-value-added liquid chemicals that are easy to transport and use is of great importance to the strategic adjustment of my country's energy structure, the development of the western region, and the sustainable development of the entire western economy. Practical significance. The partial oxidatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J37/00B01J37/02C01B3/36C01B3/38
CPCY02P20/52
Inventor 郭向云靳国强孙卫中
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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