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Catalytic agent and preparation method for preparing natural gas by mixing coke-oven gas and straw gas

A technology of catalyst and coke oven gas, which is applied in the field of methanation catalyst and its preparation, can solve the problems of low conversion rate and unfavorable industrial application, etc., and achieve the effects of high conversion rate of CO, inhibition of shift reaction, and good carbon resistance

Inactive Publication Date: 2014-03-19
SICHUAN TECHAIRS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN201110188574.2 also discloses a catalyst for a coal-to-natural gas methanation reactor, but the catalyst has a low conversion rate of CO in the methanation reaction, which is not conducive to industrial application

Method used

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  • Catalytic agent and preparation method for preparing natural gas by mixing coke-oven gas and straw gas
  • Catalytic agent and preparation method for preparing natural gas by mixing coke-oven gas and straw gas
  • Catalytic agent and preparation method for preparing natural gas by mixing coke-oven gas and straw gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Place the reactor in a constant temperature water bath, put 26.54gNi(NO 3 ) 2 ·6H 2 O; 83.50gAl(NO 3 ) 3 9H 2 O; 28.92gMg(NO 3 ) 2 ·6H 2 O; 0.60gLa(NO 3 ) 3 ·6H 2 O was prepared into 1L solution and added to the reaction kettle, stirred, and 10% K was added when heated to 68°C 2 CO 3Solution, maintain this temperature for precipitation reaction and finally adjust the pH value to 9.2. The precipitate obtained by filtering and washing is the catalyst semi-finished product. Dry the catalyst semi-finished product in a drying oven at 120°C for 5 hours, and calcinate it in a muffle furnace at 380°C for 4 hours, and mix the calcined material (catalyst semi-finished product) and graphite according to material:graphite=100:2 (mass ratio) Put it into a ball mill for grinding and mixing. All the mixture passes through a 200-mesh sieve, add 8% distilled water, mix evenly, and use a tablet forming machine to make a cylindrical shape of ￠5x5mm.

[0032] The components a...

Embodiment 2

[0034] Place the reactor in a constant temperature water bath, put 44.24gNi(NO 3 ) 2 ·6H 2 O; 50.13gAl(NO 3 ) 3 9H 2 O; 17.35gMg(NO 3 ) 2 ·6H 2 O; 3.02gLa(NO 3 ) 3 ·6H 2 O was prepared as a 1L solution and added to the reactor, stirred, and 12% K was added when heated to 72 °C 2 CO 3 Solution, maintain this temperature for precipitation reaction and finally adjust the pH value to 9.5. The precipitate obtained by filtering and washing is the catalyst semi-finished product. Dry the semi-finished catalyst in a drying oven at 150°C for 4 hours, calcinate it in a muffle furnace at 450°C for 3 hours, put the calcined material and graphite into a ball mill according to material: graphite = 100:3 (mass ratio) Grinding and mixing are carried out, and the mixture is all passed through a 200-mesh sieve, 10% distilled water is added, after mixing evenly, it is made into a cylindrical shape of ￠5x5mm by a tablet forming machine.

[0035] The components and their mass percenta...

Embodiment 3

[0037] Place the reactor in a constant temperature water bath, put 35.39gNi(NO 3 ) 2 ·6H 2 O; 66.85gAl(NO 3 ) 3 9H 2 O; 23.14gMg(NO 3 ) 2 ·6H 2 O; 1.8gLa(NO 3 ) 3 ·6H 2 O was prepared into 1L solution and added to the reaction kettle, stirred, and 10% K was added when heated to 70°C 2 CO 3 Solution, maintain this temperature for precipitation reaction and finally adjust the pH value to 9.2. The precipitate obtained by filtering and washing is the catalyst semi-finished product. Dry the semi-finished catalyst in a drying oven at 120°C for 4 hours, calcinate it in a muffle furnace at 400°C for 4 hours, put the calcined material and graphite into a ball mill according to material: graphite = 100:2 (mass ratio) Grinding and mixing are carried out, and the mixture is all passed through a 200-mesh sieve, 10% distilled water is added, after mixing evenly, it is made into a cylindrical shape of ￠5x5mm by a tablet forming machine.

[0038] The components and their mass pe...

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Abstract

The invention belongs to the technical field of methanation catalytic agents, particularly relates to a methanation catalytic agent and a preparation method for preparing natural gas by mixing coke-oven gas and straw gas in a natural gas synthetic process. The catalytic agent comprises a carrier, an active component and an accessory ingredient, the carrier is AI2O3 and MgO, the active component is NiO, the accessory ingredient is La2O3, and the catalytic agent comprises, by weight, 30-50% of NiO, 1-5% of La2O3, 30-50% of AI2O3, 12-20% of MgO and 1-3% of graphite. The preparation method of the catalytic agent comprises depositing and reacting to prepare semi-finished products, drying, burning, mixing materials, compressing and molding. The catalytic agent has the advantages of being good in activity, heat stability and carbon resisting performance, having good thermostability and the like.

Description

technical field [0001] The invention belongs to the technical field of methanation catalysts, in particular to a methanation catalyst in the process of preparing synthetic natural gas by mixing coke oven gas and straw gas and a preparation method thereof. Background technique [0002] Natural gas has the characteristics of high efficiency, cleanliness, and convenient transmission. It is an ideal clean energy source. However, China is a country rich in coal, less in oil, and poor in gas. In order to speed up the contradiction between the supply and demand of gas in my country, in addition to relying on the existing domestic resources, it is necessary to expand the supply of resources through multiple channels and methods to meet the growing market demand. At present, most of the coal gas methanation or Coke oven gas methanation is used to develop artificial gas and provide gas supply. However, coke oven gas contains a large amount of hydrogen (see the table below), and a larg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83C07C9/04C07C1/04C07C1/12C10L3/08
Inventor 钟娅玲曾启明钟雨明陈天洪陈运
Owner SICHUAN TECHAIRS