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Methanation catalyst for synthetic natural gas from coal and preparation method for methanation catalyst

A methanation catalyst, a technology for synthesizing natural gas, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. High activity and stability, high selectivity, good heat resistance

Inactive Publication Date: 2012-09-12
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first oil crisis occurred in the world in the 1970s, and this kind of response was regarded as C 1 The key reaction of chemistry has become the research focus of catalysis science and engineering, and has been developed rapidly, but there are few achievements in real industrialization

Method used

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  • Methanation catalyst for synthetic natural gas from coal and preparation method for methanation catalyst
  • Methanation catalyst for synthetic natural gas from coal and preparation method for methanation catalyst
  • Methanation catalyst for synthetic natural gas from coal and preparation method for methanation catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 6.980g (0.024mol) Ni(NO 3 ) 2 ·6H 2 O, 4.719g (0.012mol) Zr(NO 3 ) 4 ·3H 2 O and 1.316g (0.004mol) Y(NO 3 ) 3 ·6H 2 O (purity are all AR grade) mixed together, add 100mL deionized water to make solution A; another 5.724g (0.054mol) AR grade anhydrous Na 2 CO 3 Dissolve in 100 mL deionized water to make solution B. At a temperature of 80°C, inject solution A into a 500mL beaker preloaded with solution B (injection rate is about 20mL / min), and carry out co-precipitation reaction at a constant temperature of 80°C and constant stirring. By adjusting Na 2 CO 3 The adding amount of the aqueous solution keeps the pH value of the precipitation solution at 7.0. After the addition, the stirring was continued at 80°C for 30 minutes, then the stirring was stopped, and the mixture was filtered immediately. The resulting precipitate was soaked and stirred in 500mL of 60°C hot water for 10 minutes each time, then allowed to stand for 10 minutes, then filtered, and washed f...

Embodiment 2

[0029] 9.307g (0.032mol) Ni(NO 3 ) 2 ·6H 2 O, 4.719g (0.012mol) Zr(NO 3 ) 4 ·3H 2 O and 1.316g (0.004mol) Y(NO 3 ) 3 ·6H 2 O (purity are all AR grade) mixed together, add 100mL deionized water to prepare solution A; another 6.572g (0.062mol) AR grade anhydrous Na 2 CO 3 Dissolve in 100 mL deionized water to make solution B. At a temperature of 80°C, inject solution A into a 500mL beaker preloaded with solution B (injection rate is about 20mL / min), and carry out co-precipitation reaction at a constant temperature of 80°C and constant stirring. By adjusting Na 2 CO 3 The adding amount of the aqueous solution keeps the pH value of the precipitation solution at 7.0. After the addition, the stirring was continued at 80°C for 30 minutes, then the stirring was stopped, and the mixture was filtered immediately. The resulting precipitate was soaked and stirred with 500mL of 60°C hot water for 10 minutes each time, then allowed to stand for 10 minutes, then filtered, washed ...

Embodiment 3

[0032] 4.653g (0.016mol) Ni(NO 3 ) 2 ·6H 2 O, 4.719g (0.012mol) Zr(NO 3 ) 4 ·3H 2 O and 1.316g (0.004mol) Y(NO 3 ) 3 ·6H 2 O (purity are all AR grade) mixed together, add 100mL deionized water to prepare solution A; another 4.876g (0.046mol) AR grade anhydrous Na 2 CO 3Dissolve in 100 mL deionized water to make solution B. At a temperature of 80°C, inject solution A into a 500mL beaker preloaded with solution B (injection rate is about 20mL / min), and carry out co-precipitation reaction at a constant temperature of 80°C and constant stirring. By adjusting Na 2 CO 3 The adding amount of the aqueous solution keeps the pH value of the precipitation solution at 7.0. After the addition, the stirring was continued at 80°C for 30 minutes, then the stirring was stopped, and the mixture was filtered immediately. The resulting precipitate was soaked and stirred with 500mL of 60°C hot water for 10 minutes each time, then allowed to stand for 10 minutes, then filtered, washed f...

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Abstract

The invention discloses a methanation catalyst for synthetic natural gas from coal and a preparation method for the methanation catalyst, relating to a catalyst. The catalyst comprises the main components of Ni and Zr, and an accelerating agent Y; the chemical formula of the catalyst is NiiZrjYk, wherein the subscripts i, j and k in the formula are molar proportional factors of Ni, Zr and Y in the catalyst, wherein the catalyst comprises 38%-67% of Ni, 6%-30% of Y and the balance of Zr. The preparation method comprises the following steps of: mixing Ni(NO3)2.6H2O, Zr(NO3)4.3H2O and Y(NO3)3.6H2O and adding water to prepare solution A; dissolving Na2CO3 into the water to prepare solution B; and injecting the solution A into a container which is filled with partial solution B in advance, then enabling the pH value of a coprecipitation reaction system to be 7.0-7.5 by adjusting the added amount of the solution B, filtering the feed liquid after reaction and obtaining precipitates; cleaning the precipitates with deionized water till the concentration of Na+ ions in leacheate is below 0.1ppm, filtering, drying and roasting to obtain the methanation catalyst.

Description

technical field [0001] The invention relates to a catalyst, in particular to a methanation catalyst used for producing synthetic natural gas from coal-based synthesis gas or coke oven gas. Background technique [0002] Energy and the environment are one of the most concerned focuses in the world today, and the comprehensive and optimized utilization of fossil energy resources is imminent. my country is rich in coal, low in oil, and poor in gas. Optimizing the use of relatively abundant coal resources to make "Synthetic natural gas" (abbreviated as SNG) can not only increase the supply of SNG with high energy utilization rate, but also greatly reduce greenhouse gases. emissions, to achieve a win-win effect of energy and the environment. [0003] The technical basis of SNG from coal is the methanation reaction, the so-called methanation reaction usually refers to CO or CO 2 Hydrogenation to CH under the action of a catalyst 4 and H 2 Strong exothermic reaction of O. The fi...

Claims

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Application Information

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IPC IPC(8): B01J23/83C10L3/08
Inventor 张鸿斌刘志铭林国栋
Owner XIAMEN UNIV
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