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Method for non-thermal plasma and transition metal concerted catalysis CO2 hydrogenation

A non-thermal plasma, transition metal technology for carbon monoxide, organic chemistry, hydrocarbon production from carbon oxides, etc.

Inactive Publication Date: 2010-11-10
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using plasma and catalyst synergy to realize CO 2 The technology of hydroconversion reaction has not been reported

Method used

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  • Method for non-thermal plasma and transition metal concerted catalysis CO2 hydrogenation
  • Method for non-thermal plasma and transition metal concerted catalysis CO2 hydrogenation
  • Method for non-thermal plasma and transition metal concerted catalysis CO2 hydrogenation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This example introduces the preparation method of the supported catalyst.

[0025] Take by weighing 3.686 grams of cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O), dissolved in 9 ml of deionized water to make a red solution. Weigh 3.0 g of SiO 2 (White carbon black) is put into 50 milliliters beakers, and the cobalt nitrate solution that prepares is added dropwise to fills SiO 2 In a beaker, stir while adding dropwise to obtain a pink paste. After the paste was allowed to stand at room temperature for 12 hours, it was dried at 120°C for 12 hours, and fired at 500°C for 3 hours to obtain a Co / SiO mixture with a mass fraction of 20%. 2 catalyst precursor.

Embodiment 2

[0027] This embodiment will provide the plasma reduction of the catalyst precursor, the hydrogenation reaction conditions and the analysis methods and conditions of the inlet and outlet gases, and the CO 2 The effect of the hydrogenation reaction.

[0028] The catalyst precursor (0.88 gram) that obtains in embodiment 1 is loaded into the quartz tube that internal diameter is 8 millimeters, outer diameter is 10 millimeters, and both ends are fixed with quartz wool catalyst precursor, feed hydrogen (flow rate: 80ml / min), under plasma conditions (total input power 50V×0.40A) reduction for 30 minutes to obtain a supported Co catalyst. H 2 The flow rate is adjusted to 50ml / min, and CO is introduced 2 (Flow rate: 10ml / min), adjust the input voltage of the plasma reactor to 45V, the corresponding input current is 0.30A, start CO 2 the hydrogenation reaction.

[0029] CO in import and export gas 2 、CH 4 and CO content are detected by gas chromatography (GC-7890), the detector i...

Embodiment 3

[0037] It can be seen from this example that CO can be adjusted by changing the catalyst and reaction conditions 2 Conversion and product selectivity.

[0038] Prepare SiO with reference to the method of embodiment 1 2 Supported Fe and Ru catalysts (metal loadings are 20% by mass), carry out CO according to the reaction steps in Example 2 2 the hydrogenation reaction. Change the input power, and after the reaction system is stable, analyze the outlet gas composition and calculate the reaction conversion rate and product selectivity, the results are shown in the table below. It can be seen that metal catalysts for CO 2 The hydrogenation selectivity has a decisive influence.

[0039]

[0040]

[0041] The above examples illustrate the synergy between dielectric barrier discharge plasma and catalysis to achieve CO under mild conditions. 2 The method and effect of hydroconversion. It is very clear to those skilled in the art that some modifications and improvements can...

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Abstract

The invention belongs to the field of carbon dioxide emission reduction and carbon dioxide conversion, and relates to a method for converting greenhouse gases into high value-added CH4 and CO. The invention is characterized in that media block electric discharge to activate CO2 and H2 molecules and form uniformly distributed nonequilibrium plasmas, hydrogenation is carried out on activated species on a catalyst arranged in a plasma reactor, and CH4, CO, CH4 and CO mixtures are selectively generated; and the proportion of reaction gases of CO2 and H2 is not fixed. The method can convert the greenhouse gas CO2 into high value-added CH4 and CO. The method does not have special requirements or limits on the source and composition of the gas, thereby having universality on CO2 and H2 gases with various components. The technical method can be applied to the hydro-conversion of CO2 with high concentration, and can also be used for the hydro-conversion of CO2 in industrial gasses with low concentration and underground coal gasified gas.

Description

technical field [0001] The invention belongs to the field of carbon dioxide emission reduction and carbon dioxide conversion, and relates to a method for converting greenhouse gas into high value-added CH 4 and CO methods. Background technique [0002] CO emitted into the atmosphere by human beings in production and life 2 It is considered to be the culprit of the greenhouse effect and the main factor leading to abnormal changes in the world's climate. From the official entry into force of the "United Nations Framework Convention on Climate Change" in 1994 to the official entry into force of the "Kyoto Protocol" in 2005, until the Copenhagen Conference in 2009, the CO 2 emissions are still a major problem facing countries around the world. CO 2 The separation, recovery, transformation and reuse of cellulose have become a hot topic in current scientific research. [0003] On the other hand, non-toxic and non-flammable CO 2 It is a potentially important carbon resource, ...

Claims

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Application Information

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IPC IPC(8): C07C9/04C07C1/12C01B31/18C01B32/40
Inventor 王安杰杨颖秦明磊李翔
Owner DALIAN UNIV OF TECH
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