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A kind of preparation method of composite wide temperature methanation catalyst

A methanation catalyst and composite technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as uneven distribution of catalyst surface, low nickel content of catalyst, catalyst agglomeration, etc., to achieve Effects of increasing effective active area, improving thermal stability, and improving mechanical strength

Active Publication Date: 2016-03-30
HUANENG CLEAN ENERGY RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the nickel content of the catalyst prepared by the impregnation method is low, which is not conducive to the methanation of high-concentration CO. In order to increase the loading capacity of nickel, multiple impregnations are required. It is easier to induce catalyst agglomeration and deactivation

Method used

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  • A kind of preparation method of composite wide temperature methanation catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]A. Preparation of porous carrier

[0033] Weigh 224.43gAl(NO 3 ) 3 9H 2 0 and 31.81gMg(NO 3 ) 2 ·6H 2 O was dissolved in 1L deionized water and stirred evenly to form a mixed salt solution, which was heated to 80°C and weighed 35.37g Na 2 CO 3 and 77.09g NaOH were dissolved in 2L deionized water to form a mixed alkali solution, and the mixed salt solution was added dropwise to the mixed alkali solution, and when the pH value of the solution reached 7.0, the dropwise addition was stopped, and the resulting precipitate was filtered and washed with deionized water for 5 The second time, the filter cake was vacuum-dried at 120°C for 4 hours, baked in a tube furnace at 450°C for 6 hours under nitrogen protection atmosphere, cooled and crushed to about 200 mesh (±10) to prepare a porous carrier.

[0034] B. Modification of porous carrier

[0035] The porous carrier of about 200 mesh prepared in step A is surface-activated with ethanol solution, and then weighed 2.66gLa...

Embodiment 2

[0043] A. Preparation of porous carrier

[0044] Weigh 202.36gAl(NO 3 ) 3 9H 2 0 and 19.09gMg(NO 3 ) 2 ·6H 2 O was dissolved in 1L deionized water and stirred evenly to form a mixed salt solution, which was heated to 80°C and weighed 57.38g Na 2 CO 3 and 50.45g NaOH were dissolved in 2L deionized water to form a mixed alkali solution, and the mixed salt solution was added dropwise to the mixed alkali solution, and when the pH value of the solution reached 7.0, the dropwise addition was stopped, and the resulting precipitate was filtered and washed with deionized water for 5 The second time, the filter cake was vacuum-dried at 110°C for 4 hours, baked in a tube furnace at 500°C for 5 hours in a nitrogen-protected atmosphere, cooled and crushed to about 200 mesh (±10) to prepare a porous carrier.

[0045] B. Modification of porous carrier

[0046] Add the porous carrier of about 200 mesh prepared in step A into the ethanol solution for surface activation, then weigh 15.9...

Embodiment 3

[0054] A. Preparation of porous carrier

[0055] Weigh 194.99gAl(NO 3 ) 3 9H 2 0 and 12.73gMg(NO 3 ) 2 ·6H 2 O was dissolved in 1L deionized water and stirred evenly to form a mixed salt solution, which was heated to 80°C and weighed 59.79g Na 2 CO 3 and 79.05g NaOH were dissolved in 2L deionized water to form a mixed alkali solution, and the mixed salt solution was added dropwise to the mixed alkali solution. When the pH value of the solution reached 7.0, the dropwise addition was stopped, and the resulting precipitate was filtered and washed with deionized water for 5 The second time, the filter cake was vacuum-dried at 110°C for 4 hours, baked in a tube furnace at 550°C for 4 hours in a nitrogen-protected atmosphere, cooled and crushed to about 200 mesh (±10) to prepare a porous carrier.

[0056] B. Modification of porous carrier

[0057] Add the porous carrier of about 200 mesh prepared in step A into the ethanol solution for surface activation, then weigh 7.97gLa(...

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Abstract

The invention discloses a method for preparing a composite wide-temperature methanation catalyst. The composite wide-temperature methanation catalyst consists of NiO, La2O3, ZrO2, CeO2, CaO, MgO, Al2O3 and graphite. The preparation method comprises the following steps: by taking Mg as a structure assistant, and by taking Na2CO3 and NaOH as precipitators, preparing a porous support; modifying the porous support by adopting rare earth promoters La, Zr and Ce; impregnating the modified porous support in a salt solution of excessive active ingredients to form a catalyst I; filtering, drying and roasting the catalyst I and continuously impregnating in a salt solution of nickel to form suspension; heating and precipitating the suspension, filtering, drying and roasting the precipitate, cooling and crushing to obtain nano-scale composite wide-temperature methanation catalyst. The prepared methanation catalyst is low in activating temperature and high in anti-carbon deposition capability, also has high methanation activity under high temperature conditions, is suitable for preparing natural gas through synthesis gas at 250 to 700 DEG C and is stable in catalytic activity.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a preparation method of a composite wide-temperature methanation catalyst. Background technique [0002] Natural gas is an efficient, safe and clean fossil energy, and its proportion in global energy consumption is increasing year by year; in recent years, with the enhancement of people's awareness of environmental protection and the improvement of people's quality of life, the gap in my country's demand for natural gas has increased year by year . In addition, my country's energy structure is "rich in coal, short of oil, and low in gas". Using relatively abundant coal resources to develop coal-based natural gas can not only alleviate the shortage of natural gas supply in my country, make up the gap between supply and demand of natural gas, but also help realize the diversification of oil and gas resources. It has important strategic significance in terms ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83B01J35/10C10L3/08
Inventor 王晓龙何忠郜时旺肖天存许世森
Owner HUANENG CLEAN ENERGY RES INST
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