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Application of hydrogen-donor solvent and surfactant in methanation reaction

A technology for surfactants and hydrogen-donating solvents, applied in the application field of hydrogen-donating solvents and surfactants in methanation reactions, can solve problems such as easy agglomeration, poor activity, and fewer active sites, and achieve stable system thermal balance , mild reaction conditions, increased stability

Inactive Publication Date: 2015-04-29
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

plus reagent gases (CO and H 2 ) has poor solubility and diffusibility in such media
resulting in CO and H in the gas phase 2 It is difficult to enter the catalyst surface through the liquid phase, that is, the reactant gases (CO and H 2 ) cannot be continuously supplied to the surface of the catalyst in sufficient quantity, limiting its reaction rate
On the other hand, the supported catalyst used in the reaction, the active component is affected by the surface tension at high temperature, and it is easy to agglomerate on the surface of the carrier, and the active site becomes less, resulting in poor activity.
The above two problems limit the application of slurry bed in syngas or coke oven gas methanation reaction

Method used

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  • Application of hydrogen-donor solvent and surfactant in methanation reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh 58.16g Ni(NO 3 ) 2 ·6H 2O (0.2mol), dissolve it in 570ml of ethylene glycol solution, then add 2.35g of PVP, after the dissolution is complete, put the beaker in a 60°C water bath. Under stirring conditions, 300.35 g of hydrazine hydrate was added dropwise with a microsampler. After mixing evenly, add 1mol / L NaOH solution to adjust the pH to about 12. Afterwards, the temperature was raised to 70° C. for 3.5 hours. After the reaction was complete, a black solid precipitate was obtained after centrifugation and removal of the supernatant. The black solid precipitate was washed successively with ethanol and distilled water, centrifuged, and dried under nitrogen protection to obtain a black powder. Then the saturated ammonium molybdate solution is impregnated on the black powder according to the molar ratio of Mo (molybdenum): Ni is 10:100, and the impregnation time is 19h. Afterwards, the impregnated sample was fired for 2 h at 270 °C in an Ar atmosphere; then t...

Embodiment 2

[0034] Weigh 58.16g Ni(NO 3 ) 2 ·6H 2 O (0.2mol), dissolve it in 650ml of ethylene glycol solution, then add 2.30g of PVP, after the dissolution is complete, put the beaker in a 60°C water bath. Under stirring conditions, 300.35 g of hydrazine hydrate was added dropwise with a microsampler. After mixing evenly, add 1mol / L NaOH solution to adjust the pH to about 10. Afterwards, the temperature was raised to 70° C. for 2.5 hours. After the reaction was complete, a black solid precipitate was obtained after centrifugation and removal of the supernatant. The black solid precipitate was washed successively with ethanol and distilled water, centrifuged, and dried under nitrogen protection to obtain a black powder. Then the saturated ammonium molybdate solution is impregnated on the black powder according to the molar ratio of Mo (molybdenum): Ni is 4:100, and the impregnation time is 17h. Afterwards, the impregnated sample was fired for 3 h at 330 °C in an Ar atmosphere; then t...

Embodiment 3

[0037] Weigh 58.16g Ni(NO 3 ) 2 ·6H 2 O (0.2mol), dissolve it in 1200ml ethylene glycol solution, then add 1.55g PVP, after the dissolution is complete, put the beaker in a 60°C water bath. Under stirring conditions, 200.23 g of hydrazine hydrate was added dropwise with a microsampler. After mixing evenly, add 1mol / L NaOH solution to adjust the pH to about 12. Afterwards, the temperature was raised to 65° C. for 3 h. After the reaction was complete, the black solid precipitate was obtained after centrifugation and removal of the supernatant. The black solid precipitate was washed successively with ethanol and distilled water, centrifuged, and dried under nitrogen protection to obtain a black powder. Then impregnate the saturated ammonium molybdate solution on the black powder according to the molar ratio of Mo (molybdenum): Ni: 15:100, and the impregnation time is 24h. Afterwards, the impregnated sample was calcined at 320 °C in an Ar atmosphere for 2 h; then the temperat...

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Abstract

The invention discloses application of a hydrogen-donor solvent and a surfactant in a methanation reaction. An active hydrogen-donor solvent and the surfactant and the surfactant are added into a slurry bed reactor; a methanation catalyst is used for performing a methanation reaction under the effects of the active hydrogen-donor solvent and the surfactant, wherein the amount of added surfactant is 1% to 12.5% of the volume of the hydrogen-donor solvent; the ratio of the catalyst to the hydrogen-donor solvent is (0.002-0.01)g to 1ml; the hydrogen-donor solvent comprises tetrahydronaphthalene, decahydronaphthalene or glycol. The application disclosed by the invention has the advantages of being simple in process, high in reaction rate and suitable for the slurry bed reactor.

Description

technical field [0001] The invention belongs to the application of an active hydrogen-donating solvent and a surfactant in a slurry bed methanation reaction. Background technique [0002] my country's energy structure is rich in coal, low in oil, and short of gas. With the acceleration of urbanization and the improvement of environmental protection in my country, the demand for natural gas is growing rapidly. However, my country's energy structure limits the supply of natural gas, resulting in a very prominent contradiction between supply and demand of natural gas. However, using coal, which has a relatively large resource advantage in our country, establishes large-scale coal chemical industry bases in coal-producing areas, and realizes on-site conversion of coal to produce substitute natural gas, which can not only supplement the supply of natural gas, but also convert coal transportation into gas transmission. It can alleviate the tense situation of natural gas supply an...

Claims

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Application Information

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IPC IPC(8): C07C9/04C07C1/04B01J23/883
Inventor 王志青黄国宝李庆峰黄戒介房倚天赵建涛张永奇
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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