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Catalyst for preparing synthetic natural gas and preparation method thereof

A technology for synthesizing natural gas and catalysts, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve poor selectivity, high cost, and easy carbon deposition of Fe-based catalysts Inactivation and other problems, to achieve the effect of activity and stability, easy production, high selectivity

Inactive Publication Date: 2013-06-26
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The following information can be obtained from the basic research results and related materials reported publicly: Ni-based catalysts (high Ni content, 20% to 70%) are the mainstream catalysts; Fe-based catalysts are prone to carbon deposition and deactivation; Co-based catalysts have strong tolerance, However, the selectivity is poor; the activity of Ru-based catalysts is higher than that of Ni-based catalysts, but the cost is high; Ru, Rh, and Pd-based catalysts have better low-temperature performance

Method used

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  • Catalyst for preparing synthetic natural gas and preparation method thereof
  • Catalyst for preparing synthetic natural gas and preparation method thereof
  • Catalyst for preparing synthetic natural gas and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 6.979gNi(NO 3 ) 2 ·6H 2 O, 4.719g Zr(NO 3 ) 4 ·3H 2 O and 0.924g Sc(NO 3 ) 3 (Purities are all AR grade) mixed together, add 90mL deionized water to make solution A; another 7.837g AR grade anhydrous K 2 CO 3 Dissolve in 95mL deionized water to prepare solution B; at 80°C, inject solution A and solution B into the reaction vessel at an equal velocity (injection rate: 12mL / min), and carry out at a constant temperature of 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 at 7.3 to 7.6. 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 0.1ppm (detected by flame ion absorption method), after filtration, the filter cake is dried at 110°C for 18h, and roasted at 4...

Embodiment 2

[0030] 6.979gNi(NO 3 ) 2 ·6H 2 O, 3.932gZr(NO 3 ) 4 ·3H 2 O and 1.386g Sc(NO 3 ) 3 (Purities are all AR grade) mixed together, add 90mL deionized water to prepare solution A; another 7.691g AR grade anhydrous K 2 CO 3 Dissolve in 95mL deionized water to prepare solution B; inject solution A and solution B into a reaction vessel at the same speed at 85°C (injection rate is 12mL / min), and keep stirring at 85°C Co-precipitation reaction, by regulating K 2 CO 3 Add the amount of aqueous solution to keep the pH value of the precipitation solution at 7.0 to 7.5. 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 0.1ppm (detected by flame ion absorption method), and after filtration, the filter cake is dried at 115°C for 16 hours and roasted at 420°C for 3 hours to obtain the desired cat...

Embodiment 3

[0033] 6.979gNi(NO 3 ) 2 ·6H 2 O, 5.505gZr(NO 3 ) 4 ·3H 2 O and 0.462g Sc(NO 3 ) 3 (Purities are all AR grade) mixed together, add 90mL deionized water to prepare solution A; another 7.982g AR grade anhydrous K 2 CO 3 Dissolve in 95mL deionized water to prepare solution B; inject solution A and solution B into a reaction vessel at the same speed at 80°C (injection rate is 12mL / min), and keep stirring at 80°C Co-precipitation reaction, by regulating K 2 CO 3 Add the amount of aqueous solution to keep the pH value of the precipitation solution at 7.3 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 0.1ppm (detected by flame ion absorption method), and after filtration, the filter cake is dried at 105°C for 20 hours and roasted at 375°C for 5 hours to obtain the desired cat...

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Abstract

The invention discloses a catalyst for preparing synthetic natural gas and a preparation method thereof, and relates to a catalyst. The catalyst is scandium-enhanced coprecipitation type nickle-cobalt-based catalyst, the chemical formula is NiiZrjSck, wherein the subscripts i, j and k in the formula are the molar ratio factor of Ni, Zr and Sc in the catalyst; the catalyst comprises the following components in percent by weight: 48%-62% of Ni, 3%-25% of Sc and the balance of Zr. The preparation method comprises the following steps of: mixing and preparing metered Ni(NO3)2.6H2O, Zr(NO3)4.3H2O and Sc(NO3) into aqueous solution, carrying out coprecipitation reaction with K2CO3 aqueous solution, filtering feed liquid after reaction, cleaning, drying and roasting on filtered cakes, and then obtaining the NiiZrjSck catalyst for methanation of coal or biomass-based synthetic natural gas. The catalyst disclosed by the invention has the advantages that the activity is high and stable, the heat resistance is good, the conversion rate of hydrogenated methanation of CO and CO2 and the per pass yield of a product (methane) can be effectively improved.

Description

technical field [0001] The invention relates to a catalyst, in particular to a catalyst for producing synthetic natural gas through hydromethanation of coal or biomass-based synthesis 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 and biomass 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 (especially low-quality crushed coal) to produce synthetic natural gas (SNG) can not only increase the supply of SNG with high energy utilization efficiency, but also greatly reduce greenhouse gas emissions, which has great economic value and social significance . On the other hand, biomass energy is an important renewable energy source. Biomass contains a large amount of carbonaceous substances. The use of biomass to produce SNG can not only greatly reduce the CO ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C10L3/08
Inventor 张鸿斌代陈刘志铭林国栋
Owner XIAMEN UNIV
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