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A kind of preparation method of methanation catalyst carrier

A technology of methanation catalyst and carrier, which is applied in the field of preparation of methanation catalyst carrier, can solve the problems of increased reduction difficulty, insufficient stability, and reduced catalyst activity, and achieve good activity stability and anti-carbon performance, good high-temperature water Thermal stability and anti-carbon performance, the effect of simple preparation method

Active Publication Date: 2019-07-30
XIAN ORIGIN CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Al is used in Chinese patent CN201310045850.9 2 o 3 As a carrier, a high-temperature-resistant methanation catalyst was prepared by chemical precipitation. During the preparation of the catalyst, a large amount of nickel-aluminum spinel was generated due to the strong interaction between the active component nickel and the carrier, which increased the difficulty of reduction and may exist under high temperature conditions. Insufficient stability; patent 101391218A discloses a methanation catalyst and its preparation method. The agent uses magnesium-aluminum spinel as a carrier and is prepared by impregnating the active component nickel. low reaction conditions
Although there are domestic technical guidance on syngas methanation catalysts prepared by different methods, these catalysts are prone to high-temperature sintering or carbon accumulation on the surface in the reaction of coal-to-natural gas with high temperature water vapor and high CO content, resulting in reduced catalyst activity
At present, there is no technology that has withstood the test of long-term industrial application under high-temperature hydrothermal conditions

Method used

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  • A kind of preparation method of methanation catalyst carrier
  • A kind of preparation method of methanation catalyst carrier
  • A kind of preparation method of methanation catalyst carrier

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Embodiment 1

[0038] The method for preparing the methanation catalyst carrier in this embodiment comprises the following steps:

[0039] Step 1, 600g γ-Al 2 o 3 After mixing the powder with 100g of lanthanum oxide evenly, add water to make a suspension, then add 25mL of 0.3mol / L dilute nitric acid solution into the suspension, and reflux at a temperature of 80°C for 2 hours to make an aluminum sol; The mass ratio of the alumina powder to lanthanum oxide is 6:1; the addition of nitric acid in the dilute nitric acid solution is 0.47% by the mass of lanthanum oxide;

[0040] Step 2, 1280g magnesium nitrate crystal (Mg(NO 3 ) 2 ·6H 2 O ) and 349g zirconium nitrate crystals (Zr(NO 3 ) 4 ·5H 2 (2) be dissolved in 3.2L deionized water and be made into mixed solution; The mass concentration of magnesium nitrate in the described mixed solution is 0.4g / mL, and the mass concentration of zirconium nitrate in the described mixed solution is 0.15g / mL;

[0041]Step 3. Mix the aluminum sol describ...

Embodiment 2

[0046] The method for preparing the methanation catalyst carrier in this embodiment comprises the following steps:

[0047] Step 1, 345g γ-Al 2 o 3 Powder, 305g of pseudoboehmite and 70g of lanthanum oxide are evenly mixed, then add water to form a suspension, then add 27mL of 0.2mol / L dilute nitric acid solution into the suspension and reflux at a temperature of 80°C React 2h to make aluminum sol; the mass ratio of the alumina powder to lanthanum oxide is 9.3:1; the addition of nitric acid in the dilute nitric acid solution is 0.49% by mass of lanthanum oxide;

[0048] Step 2, 1152g magnesium nitrate crystal (Mg(NO 3 ) 2 ·6H 2 O ), 178g zirconium nitrate crystals (Zr(NO 3 ) 4 ·5H 2 O ) and 178g cerium nitrate crystals (Ce(NO 3 ) 4 ·6H 2 (2) be dissolved in 1.1L deionized water and be made into mixed solution; The mass concentration of magnesium nitrate in the described mixed solution is 0.6g / mL, and the mass concentration of zirconium nitrate in the described mixed ...

Embodiment 3

[0054] The method for preparing the methanation catalyst carrier in this embodiment comprises the following steps:

[0055] Step 1, 400g γ-Al 2 o 3 Powder, 300g of pseudoboehmite and 50g of lanthanum oxide are evenly mixed, then add water to form a suspension, then add 12mL of 0.2mol / L dilute nitric acid solution into the suspension and reflux at a temperature of 80°C React 2h to make aluminum sol; the mass ratio of the alumina powder to lanthanum oxide is 14:1; the addition of nitric acid in the dilute nitric acid solution is that the mass of lanthanum oxide is 0.3%;

[0056] Step 2, 960g magnesium nitrate crystal (Mg(NO 3 ) 2 ·6H 2 O ), 178g zirconium nitrate crystals (Zr(NO 3 ) 4 ·5H 2 O ) and 127g cerium nitrate crystals (Ce(NO 3 ) 4 ·6H 2 (2) be dissolved in 1.28L deionized water and be made into mixed solution; The mass concentration of magnesium nitrate in the described mixed solution is 0.43g / mL, and the mass concentration of zirconium nitrate in the describe...

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Abstract

The invention discloses a preparation method of a methanation catalyst carrier. The method comprises the steps of (1) uniformly mixing alumina powder and lanthanum oxide, then adding water so as to prepare turbid liquid, and then adding a dilute nitric acid solution to the turbid liquid for reaction so as to prepare alumina sol; (2) dissolving magnesium nitrate and lanthanide nitrate in deionized water so as to prepare a mixed solution; (3) mixing the alumina sol and the mixed solution under a stirring condition for reaction, so that reactant is obtained; (4) drying and crushing the reactant, so that powder is obtained, adding stearate and deionized water to the powder, uniformly mixing, then granulating, screening, so that particles are obtained, pressing the particles into cylindrical particles, and then roasting for 1 h to 4 h, so that the methanation catalyst carrier is obtained. The preparation method has the advantages of simplicity and high efficiency, and the methanation catalyst carrier prepared by using the method has the advantages of good high-temperature hydrothermal stability and anti-carbon deposition performance and is especially suitable for syngas methanation reaction processes with high CO contents and wide used temperature zones.

Description

technical field [0001] The invention belongs to the technical field of synthetic natural gas, and in particular relates to a method for preparing a methanation catalyst carrier. Background technique [0002] With the increasing demand for clean energy in my country's ecological environment protection and sustainable social development, in recent years, the proportion of natural gas, a safe and efficient clean energy, in my country's energy consumption has increased year by year, and the market demand has increased at a relatively high speed. It is predicted that by 2020, my country's natural gas market demand will reach 400 billion cubic meters, the market gap will be 200 billion cubic meters, and the degree of dependence on foreign countries will reach 40%. my country's energy structure is characterized by "rich coal, poor oil, and little gas", which determines that coal resources will still be developed and utilized as the main energy source in my country for a long time t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C1/04C07C1/12C07C9/04B01J23/10
CPCB01J23/002B01J23/10B01J2523/00C07C1/043C07C1/12B01J2523/22B01J2523/31B01J2523/3706B01J2523/48B01J2523/3712C07C9/04
Inventor 高维恒周晓奇李军吴志涛吴鹏李国林黄彦琦宋娥媚
Owner XIAN ORIGIN CHEM TECH