Ruthenium-based carbon dioxide hydromethanation catalyst and preparation method thereof

A technology for hydromethanation and carbon dioxide, applied in the field of catalysis, can solve the problems of low-temperature catalytic efficiency of the catalyst, consume a large amount, complex preparation process, etc., and achieve the effects of good carbon dioxide conversion rate, saving hydrogen consumption, and simple preparation method.

Inactive Publication Date: 2020-08-11
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of these methanation catalysts is complicated, and usually takes 3 days or even longer to prepare. The preparation process needs to consume a large a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 0.10mol / L, 50ml of NaBH 4 The solution was added into the ionic liquid 0.864g [EMIM]Cl, fully stirred at 40°C for 2h, and a clear mixed solution was obtained. 0.103g RuCl 3 ·3H 2 O was dissolved in 20ml deionized water, under the protection of nitrogen gas, the RuCl 3 ·3H 2 The aqueous solution of O was slowly added dropwise to the above mixed solution. After the dropwise addition, stirred and refluxed at 40°C for 3 hours to prepare ruthenium nanoparticles. After the reaction, cooled to 20°C, filtered under reduced pressure, and washed with ethanol and deionized water. , the 5gSiO 2 The carrier was added to the solution dispersed with Ru nanoparticles and ultrasonically stirred for 1 h to deposit the nanoparticles onto SiO 2 on the carrier. The ruthenium-based CO was prepared by vacuum drying for 5 h 2 Hydromethanation Catalyst I.

Embodiment 2

[0025] 0.15mol / L, 50ml of NaBH 4 The solution was added to the ionic liquid 1.118g [BMIM]BF 4 , fully stirred at 60°C for 30 min to obtain a clear mixed solution. Dissolve 0.157g of ruthenium nitrate in 30ml of deionized water, under the protection of helium gas, slowly add the aqueous solution of ruthenium nitrate to the above mixed solution drop by drop, after the dropwise addition, stir and reflux at 60°C for 2h to prepare ruthenium nanoparticles , cooled to 25°C after the reaction, filtered under reduced pressure, and washed with methanol and deionized water. 5g Al 2 o 3 The carrier was added to the solution dispersed with Ru nanoparticles and ultrasonically stirred for 2 h to deposit the nanoparticles onto the Al 2 o 3 on the carrier. The ruthenium-based CO was obtained by vacuum drying for 10 h 2 Hydromethanation Catalyst II.

Embodiment 3

[0027] 0.20mol / L, 50ml of NaBH 4 The solution was added into ionic liquid 2.139g [BMIM]OTf, and stirred at 80°C for 1.5h to obtain a clear mixed solution. Dissolve 0.238g of ruthenium iodide into 10ml of deionized water, and under the protection of argon gas, slowly add the aqueous solution of ruthenium iodide into the above mixed solution drop by drop, and stir and reflux at 80°C for 5h after the dropwise addition to obtain ruthenium The nanoparticles were cooled to 30° C. after the reaction, filtered under reduced pressure, and washed with deionized water. 5g TiO 2 The carrier was added to the solution dispersed with Ru nanoparticles, and ultrasonically stirred for 5 h to deposit the nanoparticles onto the TiO 2 on the carrier. The ruthenium-based CO was obtained by vacuum drying for 12 h 2 Hydromethanation Catalyst III.

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Abstract

The invention discloses a ruthenium-based carbon dioxide hydromethanation catalyst and a preparation method thereof, and belongs to the technical field of catalysis. The preparation method comprises the following steps: selecting different types of ionic liquids and fully mixing the ionic liquids with a reducing agent solution; dropwise adding a salt solution containing Ru<3+> into the mixed solution; performing heating, stirring and refluxing for a period of time under the protection of inert gas to obtain ionic liquid-stabilized nano Ru particles with different particle sizes, cooling the nano Ru particles to a certain temperature after reaction, and washing the nano Ru particles with a proper solvent; and ultrasonically stirring and depositing the Ru nano particles on different carriers, and finally performing vacuum drying treatment to obtain the ruthenium-based CO2 hydromethanation catalyst. The ruthenium-based catalyst has good metal dispersity, the methanation reaction temperature is reduced, the catalyst has good reaction activity and stability under the low-temperature condition, and the ruthenium-based catalyst can be used for improving the low-temperature CO2 methanationcatalytic performance.

Description

technical field [0001] The invention belongs to the technical field of catalysis and specifically designs a ruthenium-based carbon dioxide hydromethanation catalyst and a preparation method thereof. Background technique [0002] With the development of economy and society, the massive consumption of fossil energy has caused energy shortage, and the problem of atmospheric environment has become increasingly prominent. The emission of carbon dioxide in the atmosphere is increasing day by day, especially in my country, which consumes a large proportion of fossil energy and is a large country of carbon dioxide emission. The emission of greenhouse gas carbon dioxide has caused serious environmental and ecological problems. Catalytic conversion of carbon dioxide into high value-added chemicals is of great significance in solving the environment and realizing carbon recycling. [0003] Catalytic hydrogenation of carbon dioxide can prepare numerous compounds, among which catalytic ...

Claims

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Application Information

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IPC IPC(8): B01J23/46B01J23/63B01J35/02C07C1/12C07C9/04
CPCB01J23/462B01J23/63B01J35/026C07C1/12C07C9/04
Inventor 李春山郭鑫鹏陈洪楠张锁江
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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