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Preparation of sulfur-tolerant methanation catalyst based on SBA-16 and application of the catalyst in preparation of SNG

A SBA-16, sulfur-resistant methanation technology, applied in physical/chemical process catalysts, molecular sieve catalysts, hydrocarbon production from carbon oxides, etc., can solve problems such as obstacles and catalyst activity reduction, and achieve single and reliable technology and system heat dissipation Few, easy-to-grasp effects

Inactive Publication Date: 2015-10-14
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mechanism of sulfur poisoning of methanation catalyst is: the sulfide in the methanation reaction is mainly H 2 S, H 2 S has an unshared electron pair, which can form a strong coordination bond with the electrons in the d orbital of the transition metal nickel and preferentially adsorb on the nickel surface, which hinders the adsorption of reactive molecules and leads to a decrease in catalyst activity.

Method used

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  • Preparation of sulfur-tolerant methanation catalyst based on SBA-16 and application of the catalyst in preparation of SNG

Examples

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Embodiment 1

[0027] This example is used to illustrate that the present invention provides a sulfur-tolerant methanation catalyst and a preparation method thereof.

[0028] Weigh 0.619g of nickel nitrate hexahydrate and 0.230g of ammonium molybdate tetrahydrate and dissolve them in 1.5g of deionized water to prepare a mixed solution of nickel nitrate and ammonium molybdate. Then 1.0 g of mesoporous molecular sieve SBA-16 was weighed, and the carrier SBA-16 was impregnated in the mixed solution at room temperature by an equal-volume impregnation method. Then it was transferred to a vacuum oven at room temperature for vacuum impregnation overnight for 8 hours, and then it was dried in vacuum at a temperature of 50° C. for 6 hours. The resulting solid product is roasted in a muffle furnace at a temperature of 500°C for 5 hours. After being ground in a mortar, it is filtered with a 100-mesh sieve to obtain 10wt% nickel loading and 10wt% molybdenum loading. Sulfur-resistant methanation catalys...

Embodiment 2

[0030] This example is used to illustrate that the present invention provides a sulfur-tolerant methanation catalyst and a preparation method thereof.

[0031]Weigh 1.415g nickel nitrate hexahydrate to prepare nickel nitrate solution. Then 1.0 g of mesoporous molecular sieve SBA-16 was weighed, and the carrier SBA-16 was impregnated in an aqueous solution of nickel nitrate at room temperature by an equal-volume impregnation method. Then transfer it to a vacuum oven at room temperature for vacuum impregnation overnight for 8 hours, and then vacuum-dry it at a temperature of 50° C. for 6 hours. The resulting solid product was roasted in a muffle furnace at a temperature of 500°C for 5 hours. After being ground in a mortar, it was filtered with a 100-mesh sieve to obtain a powder with a Ni loading of 10wt%. Then weigh 0.263g of molybdenum Ammonium molybdate was formulated into ammonium molybdate solution, and then the above-mentioned synthesized powder was immersed in ammonium m...

Embodiment 3

[0033] This example is used to illustrate that the present invention provides a sulfur-tolerant methanation catalyst and a preparation method thereof.

[0034] Weigh 1.651g nickel nitrate hexahydrate to prepare nickel nitrate solution. Then 1.0 g of mesoporous molecular sieve SBA-16 was weighed, and the carrier SBA-16 was impregnated in an aqueous solution of nickel nitrate at room temperature by an equal-volume impregnation method. Then transfer it to a vacuum oven at room temperature for vacuum impregnation overnight for 8 hours, and then vacuum-dry it at a temperature of 50° C. for 6 hours. The resulting solid product was roasted in a muffle furnace at a temperature of 500°C for 5 hours. After being ground in a mortar, it was filtered with a 100-mesh sieve to obtain a powder with a Ni loading of 10wt%. Then weigh 0.613g of molybdenum Ammonium molybdate was formulated into ammonium molybdate solution, and then the above-mentioned synthesized powder was immersed in ammonium ...

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Abstract

The invention discloses a sulfur-tolerant methanation catalyst and a preparation method thereof, wherein the catalyst is a supported catalyst with metal nickel, molybdenum and the like as main active components and meso-porous molecular sieve SBA-16 as the carrier. The preparation method includes the steps of impregnating the meso-porous molecular sieve SBA-16 in a mixed solution of nickel salt and molybdenum salt, and vacuum-drying and roasting the solution. The catalyst can be used for a mixed gas composed of CO and H2 and containing 100-5000 ppm of H2S. On the basis of without deep purification to the mixed gas, the catalyst is excellent in methanation activity under the pressure of 1.0-3.0 MPa at 300-450 DEG C. The invention also discloses the preparation method of the catalyst.

Description

technical field [0001] The present invention relates to a sulfur-resistant catalyst for methanation reaction, in particular, to a kind of synthesis gas containing hydrogen sulfide and other acidic effective components CO and H 2 converted to CH 4 A methanation catalyst, wherein the catalyst consists of an active component and a carrier, and the invention also relates to a preparation method of the catalyst. Background technique [0002] In recent years, with the increasing depletion of petroleum fuels, the increasing demand for natural gas, and the large amount of CO emitted by industry 2 The resulting ecological and environmental problems are becoming more and more serious. Combining coal, biomass synthesis gas or pyrolysis gas and CO 2 Techniques for performing methanation have received widespread attention. my country's energy structure is characterized by rich coal, poor oil, and little gas, and the distribution of coal resources is extremely uneven. About 80% of coal...

Claims

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Application Information

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IPC IPC(8): B01J29/03C10L3/08C07C9/04C07C1/04
Inventor 辛忠卞志诚
Owner EAST CHINA UNIV OF SCI & TECH
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