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Synthetic methane catalyst and preparation method and application thereof

A technology for synthesizing methane and catalyst, which is applied in the field of catalyst for synthesizing methane and its preparation, and can solve the problems of intolerant to hydration and high temperature.

Active Publication Date: 2010-12-22
ENN XINNENG BEIJING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN88109760.8 is mainly used for low air speed, and H 2 / CO is higher than 5, and the above catalysts all have a common problem: not resistant to hydration and high temperature

Method used

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  • Synthetic methane catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh 23.5g of boehmite (aluminum hydroxide), add 500ml of 3% nitric acid solution, stir for 1 hour, add 59g of nickel nitrate hexahydrate and 131g of zirconium oxychloride octahydrate. Lanthanum nitrate 22g, cerium nitrate 5g, dissolved in 100ml deionized water, and mixed with the previous solution, heated to 40°C, neutralized with 5% sodium carbonate to pH 9, precipitated, filtered, washed, at 120°C Dry for 12 hours, press into tablets, then dry at 120°C for 12 hours, put it into a muffle furnace for calcination, the heating rate is 4°C / min, the temperature is 900°C, and the calcination time is 6 hours to obtain catalyst A. The specific surface is 102m 2 / g, the pore volume is 0.44ml / g.

[0032] The application of the catalyst is carried out in a fixed bed, the catalyst is placed in the middle of the constant temperature zone of the reactor, and the upper and lower sides are supported by stainless steel mesh and quartz sand. The reaction temperature is 600°C, the re...

Embodiment 2

[0034]Weigh 59g of nickel nitrate hexahydrate, 131g of zirconium oxychloride octahydrate, 22g of lanthanum nitrate, and 5g of cerium nitrate, dissolve them in 500ml of ion-free water, heat the solution to 50°C, and neutralize with 5% sodium carbonate to a pH of 9. Precipitate, filtered, washed, dried at 120°C for 14 hours, pressed into tablets, then dried at 120°C for 12 hours, put into a muffle furnace for calcination, heating rate 4°C / min, temperature 1000°C, calcination constant temperature time For 8 hours, Catalyst B was obtained. The measured surface area is 76m 2 / g, pore volume 0.33ml / g.

[0035] The application of the catalyst is carried out in a fixed bed, the catalyst is placed in the middle of the constant temperature zone of the reactor, and the upper and lower sides are supported by stainless steel mesh and quartz sand. The reaction temperature is 650°C, the reaction pressure is 5MPa, and the space velocity is 3000h -1 , the volume percentage of raw gas is com...

Embodiment 3

[0037] Weigh 23.5g of boehmite (aluminum hydroxide), add 500ml of 3% nitric acid solution, stir for 1 hour, add 59g of nickel nitrate hexahydrate and 131g of zirconium oxychloride octahydrate. Calcium nitrate 6g, lanthanum nitrate 22g, cerium nitrate 5g, dissolved in 100ml deionized water, mixed with the previous solution, heated to 60°C, neutralized with 5% sodium carbonate to pH 9.5, precipitated, filtered and washed , dried at 110°C for 16 hours, pressed into tablets, then dried at 110°C for 16 hours, put into a muffle furnace for calcination, the heating rate was 4°C / min, the temperature was 900°C, and the calcination constant temperature time was 8 hours to obtain the catalyst c. The specific surface area of ​​the catalyst is 96m 2 / g, pore volume 0.42ml / g.

[0038] The application of the catalyst is carried out in a fixed bed, the catalyst is placed in the middle of the constant temperature zone of the reactor, and the upper and lower sides are supported by stainless s...

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Abstract

The invention provides a synthetic methane catalyst and a preparation method and application thereof. The catalyst is characterized in that: a zirconia or zirconia-alumina composite carrier is taken as a carrier in a catalyst co-precipitation technical process; nickel is taken as an active ingredient; rare earth elements such as La and Ce are added to enhance the activity, selectivity and stability of the catalyst, so that the selectivity of carbon monoxide is over 99 percent; and an appropriate amount of alkali metals and alkaline-earth metals such as Ca, Ba and the like are added to enhance the thermal stability, hydration resistance and anti-carbon performance of the catalyst.

Description

technical field [0001] The invention relates to the field of methanation of carbon oxides, in particular to a catalyst for synthesizing methane and its preparation method and application. Background technique [0002] The carbon oxide methanation reaction is mainly used for gas purification in the ammonia synthesis plant; another application of the methanation reaction is to produce natural gas and city gas to increase the calorific value of the gas. As early as the 1940s, foreign countries attached great importance to the research of this process. In the 1970s, due to the energy crisis, the pace of research was accelerated, and a series of methanation processes using coal and naphtha as raw materials were developed, and entered the market. Industrial applications, especially the production of natural gas from naphtha as raw material. In recent years, the price of oil and natural gas raw materials has risen rapidly, and the gasification and liquefaction technology using coa...

Claims

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Application Information

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IPC IPC(8): B01J23/83C07C9/04C07C1/04C07C1/12
Inventor 常俊石蒋建明次东辉雷志祥郭迎秋
Owner ENN XINNENG BEIJING TECH
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