A kind of high temperature resistant methanation catalyst and preparation method thereof

A methanation catalyst and high temperature resistant technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc. Carbon deposition ability, high specific surface area, and the effect of preventing high temperature sintering

Active Publication Date: 2019-01-15
XIAN SUNWARD AEROSPACE MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The adiabatic methanation process has a large processing capacity and a high energy utilization rate. It is currently the mainstream process technology in China. The high-temperature resistant methanation catalyst used in this process is mastered by foreign companies such as Topsoe and David, and there is no mature technology in China.

Method used

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  • A kind of high temperature resistant methanation catalyst and preparation method thereof
  • A kind of high temperature resistant methanation catalyst and preparation method thereof
  • A kind of high temperature resistant methanation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Prepare the ethanol solution of the required raw materials: dissolve 86.7g nickel nitrate, 172.9g aluminum nitrate, 6.4g tetramethoxysilane, 4.0g lanthanum nitrate, 16.0g magnesium nitrate, 10.5g calcium nitrate in 1300mL of ethanol, and record as solution I;

[0025] To prepare an ethanolic solution of oxalic acid: dissolve 101.5 g of oxalic acid and 30.0 mL of ethylene glycol in 1300 mL of ethanol, and denote it as solution II;

[0026] The solution II was slowly added dropwise to the solution I under stirring at room temperature, and the addition was completed for 5 h; the solvent ethanol was evaporated and removed at 80 °C for 5 h to obtain a uniform and transparent sol, and dried at 150 °C to obtain a dry gel;

[0027] The obtained xerogel was soaked in 500 mL of deionized water, filtered, dried at 80 °C for 5 h, and the extruded material passed through a 20-mesh sieve; after calcined at 450 °C for 5 h and then lowered to room temperature, mixed with 5% graphite fo...

Embodiment 2

[0029] Prepare the ethanol solution of the required raw materials: dissolve 74.3g nickel nitrate, 172.9g aluminum nitrate, 7.6g tetramethoxysilane, 6.7g lanthanum nitrate, 19.3g magnesium nitrate, 12.6g calcium nitrate in 1300mL of ethanol, and record as solution I;

[0030] To prepare the ethanolic solution of oxalic acid: dissolve 103.7 g of oxalic acid and 15.0 mL of polyethylene glycol 400 in 1300 mL of ethanol, and record it as solution II;

[0031] The solution II was slowly added dropwise to the solution I under stirring at room temperature, and the addition was completed for 5 h; the solvent ethanol was evaporated and removed at 80 °C for 5 h to obtain a uniform and transparent sol, and dried at 150 °C to obtain a dry gel;

[0032] The obtained xerogel was soaked in 500 mL of deionized water, filtered, dried at 80 °C for 5 h, and the extruded material passed through a 20-mesh sieve; after calcined at 450 °C for 5 h and then lowered to room temperature, mixed with 5% gr...

Embodiment 3

[0034] Prepare the ethanol solution of the required raw materials: dissolve 61.9g of nickel nitrate, 183.9g of aluminum nitrate, 12.6g of tetramethoxysilane, 6.7g of lanthanum nitrate, and 32.1g of magnesium nitrate in 1300mL of ethanol, and denote it as solution I;

[0035] To prepare the ethanolic solution of oxalic acid: dissolve 101.5 g of oxalic acid and 15.0 mL of polyethylene glycol 400 in 1300 mL of ethanol, and record it as solution II;

[0036] The solution II was slowly added dropwise to the solution I under stirring at room temperature, and the addition was completed for 5 h; the solvent ethanol was evaporated and removed at 80 °C for 5 h to obtain a uniform and transparent sol, and dried at 150 °C to obtain a dry gel;

[0037] The obtained xerogel was soaked in 500 mL of deionized water, filtered, dried at 80 °C for 5 h, and the extruded material passed through a 20-mesh sieve; after calcined at 550 °C for 5 h and then lowered to room temperature, mixed with 5% gra...

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Abstract

The invention discloses a high-temperature-resistant methanation catalyst which is prepared from an active component, a carrier, a first additive and a second additive, wherein the active component is nickel, the carrier is a SiO2 / Al2O3 composite carrier, the first additive is La2O3 and the second additive is the mixture of one or two of Mg oxide and Ca oxide. The invention further discloses a preparation method of the high-temperature-resistant methanation catalyst. The preparation method comprises the steps that nickel nitrate, aluminum nitrate, tetramethoxysilane, lanthanum nitrate, magnesium nitrate and calcium nitrate are dissolved in ethyl alcohol to obtain a solution I; oxalic acid and a dispersing agent are dissolved in ethyl alcohol to obtain a solution II; the solution II is slowly dropwise added into the solution I to be evaporated and dried after solvent ethyl alcohol is removed, the product is soaked with deionized water, filter, dried, pelletized and roasted, graphite is added, tabletting is carried out, and the high-temperature-resistant methanation catalyst is obtained. The high-temperature-resistant methanation catalyst is high in specific surface area and activity.

Description

technical field [0001] The invention belongs to the technical field of catalysts and their preparation, in particular to a high temperature-resistant methanation catalyst, and also to a preparation method of the catalyst. Background technique [0002] With the continuous development of my country's economy, the demand for energy is increasing. The distinctive feature of my country's energy structure is "rich coal, lean oil, and little gas". Natural gas as a clean fuel is scarce, and a large amount of natural gas needs to be imported every year. It is estimated that by 2020, the demand for natural gas will exceed 300 billion m 3 , the market gap will reach 90 billion m 3 . Therefore, the development of coal-to-gas can not only alleviate my country's current serious environmental pollution problems, but also alleviate the shortage of natural gas supply in my country and improve the energy structure. [0003] The core process of developing coal-to-gas is methanation process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83
CPCB01J23/002B01J23/83B01J37/036B01J2523/00B01J2523/22B01J2523/23B01J2523/31B01J2523/3706B01J2523/41B01J2523/847
Inventor 许龙龙金义贺强彭东冯毅敏
Owner XIAN SUNWARD AEROSPACE MATERIAL CO LTD
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