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Catalyst used for preparing synthetic natural gas by using coal derived synthesis gas and preparation method thereof

A technology for synthesizing natural gas and coal-based syngas, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of few industrialization achievements, Achieve high and stable activity, easy production and good repeatability

Inactive Publication Date: 2012-04-11
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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  • Catalyst used for preparing synthetic natural gas by using coal derived synthesis gas and preparation method thereof
  • Catalyst used for preparing synthetic natural gas by using coal derived synthesis gas and preparation method thereof
  • Catalyst used for preparing synthetic natural gas by using coal derived synthesis gas and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 6.98gNi(NO 3 ) 2 ·6H 2 O, 4.72gZr(NO 3 ) 4 ·3H 2 O and 1.87g Yb(NO 3 ) 3 ·6H 2 O (purity are all AR grade) mixed together, add 90mL deionized water to prepare solution A.

[0022] 7.46g AR grade anhydrous K 2 CO 3 Dissolve in 90mL deionized water to prepare solution B; at 80°C, inject solutions A and B into a reaction vessel at an equal velocity (injection rate: 12mL / min), and carry out under the condition of constant temperature at 80°C and constant stirring. coprecipitation reaction, by regulating the K 2 CO 3 Add the amount of aqueous solution to keep the pH value of the precipitation solution in the range of 7.2 to 7.8. After the addition, continue to stir for 30 minutes and then stop stirring. Immediately filter the feed solution, and the obtained precipitate is washed with deionized water until it reaches K in the eluent. + The ion concentration is below 0.ppm (detected by flame ion absorption method), after filtration, the filter cake is dried at 110°...

Embodiment 2

[0032] 8.14gNi(NO 3 ) 2 ·6H 2 O, 4.72gZr(NO 3 ) 4 ·3H 2 O and 1.87g Yb(NO 3 ) 3 ·6H 2 O (purity are all AR grade) mixed together, add 90mL deionized water to prepare solution A; another 8.06g AR grade anhydrous K 2 CO 3 Dissolve in 90mL deionized water to prepare solution B; at 90°C, inject solutions A and B into a reaction vessel at an equal velocity (injection speed: 12mL / min), and carry out under the condition of constant temperature at 90°C and constant stirring. coprecipitation reaction, by regulating the K 2 CO 3 Add the amount of aqueous solution to keep the pH value of the precipitation solution in the range of 7.2 to 7.8. After the addition, continue to stir for 30 minutes, then stop stirring, and filter the feed solution immediately; the obtained precipitate is washed with deionized water until K in the eluent. + The ion concentration is below 0.1ppm (detected by flame ion absorption method), after filtration, the filter cake is dried at 110°C for 24 hours...

Embodiment 3

[0035] 5.82gNi(NO 3 ) 2 ·6H 2 O, 4.72gZr(NO 3 ) 4 ·3H 2 O and 1.87g Yb(NO 3 ) 3 ·6H 2 O (purity are all AR grade) mixed together, add 90mL deionized water to prepare solution A; another 6.94g AR grade anhydrous K 2 CO 3 Dissolve in 90mL deionized water to prepare solution B; at 80°C, inject solutions A and B into a reaction vessel at an equal velocity (injection speed: 12mL / min), and carry out under the condition of constant temperature at 80°C and constant stirring. coprecipitation reaction, by regulating the K 2 CO 3 Add the amount of aqueous solution to keep the pH value of the precipitation solution in the range of 7.2 to 7.8. After the addition, continue to stir for 30 minutes, then stop stirring, and filter the feed solution immediately; the obtained precipitate is washed with deionized water until K in the eluent. + The ion concentration is below 0.1ppm (detected by flame ion absorption method), after filtration, the filter cake is dried at 110°C for 24 hours...

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Abstract

The invention discloses a catalyst used for preparing synthetic natural gas by using coal derived synthesis gas and a preparation method thereof, relates to a catalyst for preparing synthetic natural gas by hydrogenation and methanation of the coal derived synthesis gas, and provides a catalyst which has high and stable low temperature activity, can effectively improve the conversion rate of synthesis gas and the perpass yield of methane, and is used for preparing synthetic natural gas by using coal derived synthesis gas and a preparation method thereof. The catalyst is an ytterbium-promptingcoprecipitation nickel-zirconium base catalyst and comprises the main components Ni and Zr as well as an accelerator Yb. The method comprises the following steps of: mixing Ni(NO3)2.6H2O, Zr(NO3)4.3H2O and Yb(NO3)3.6H2O, then adding water in the mixture to prepare a solution A; dissolving K2CO3 into water to prepare a solution B; injecting the solutions A and B into a container for a reaction; filtering a feed liquid to obtain precipitates; and washing with deionized water until ion concentration of K<+> in a leacheate is below 0.1ppm, then filtering, drying, roasting to obtain the catalyst.

Description

technical field [0001] The invention relates to a catalyst for producing synthetic natural gas through hydromethanation of coal-based synthesis gas, in particular to a nickel-zirconium catalyst promoted by ytterbium. 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" (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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C10L3/08
Inventor 张鸿斌黄艳辉刘志铭林国栋
Owner XIAMEN UNIV
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