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A kind of supported nano catalyst for catalytic conversion of carbon dioxide and its preparation method and application

A nano-catalyst, carbon dioxide technology, applied in the preparation of metal/metal oxide/metal hydroxide catalyst, carbon monoxide, organic compounds, etc., can solve the problems of low methanol selectivity, low carbon dioxide conversion rate, etc., and achieve active specific surface area. High, small size, high dispersion effect

Active Publication Date: 2015-12-30
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems of low carbon dioxide conversion rate and low methanol selectivity of carbon dioxide hydrogenation synthesis methanol and carbon monoxide catalysts in the prior art, the present invention provides a supported nano catalyst for catalytic conversion of carbon dioxide and its preparation method and Application, the supported nano-catalyst obtained by the preparation method disclosed in the present invention is used in the hydrogenation of carbon dioxide to synthesize methanol and carbon monoxide, the single-pass conversion rate of carbon dioxide reaches 23%, and the selectivity of methanol is greater than 95% after adding additives

Method used

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  • A kind of supported nano catalyst for catalytic conversion of carbon dioxide and its preparation method and application
  • A kind of supported nano catalyst for catalytic conversion of carbon dioxide and its preparation method and application
  • A kind of supported nano catalyst for catalytic conversion of carbon dioxide and its preparation method and application

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Embodiment 1

[0025] Weigh 0.5gCu(NO 3 ) 2 ·3H 2 O was dissolved in 10mL of deionized water to make it completely dissolved to obtain a copper nitrate solution with a concentration of 0.2mol / L; add 28% ammonia water dropwise to the copper nitrate aqueous solution to adjust the pH value of the solution to 10; add 1g of silica gel, 80 Heat and stir at ℃ until the pH value becomes 6; centrifuge, pour off the supernatant, wash the solid with deionized water three times, dry at 120°C for 8 hours; roast at 450°C for 3 hours; reduce with pure hydrogen at 300°C for 5 hours to obtain Supported nano-catalyst 1 for hydrogenation of carbon dioxide to synthesize methanol and carbon monoxide, its transmission electron microscope image is shown in figure 1 , the average particle size of nano-Cu particles is 2.1nm, the degree of dispersion is 54%, and the active specific surface area is 367.9m 2 g -1 , the graph of the change of carbon dioxide conversion rate with the reaction time is shown in figure...

Embodiment 2

[0027] Weigh 0.7gCu(NO 3 ) 2 ·3H 2 O was dissolved in 10mL of deionized water to make it completely dissolved to obtain a nitric acid solution with a concentration of 0.3mol / L; add 28% ammonia water to the copper nitrate aqueous solution drop by drop to adjust the pH of the solution to 11; add 1g of silica gel and heat at 90°C Heat and stir until the pH value becomes 5; centrifuge, pour off the supernatant, wash the solid with deionized water three times, dry at 100°C for 8 hours; roast at 600°C for 3 hours; reduce with pure hydrogen at 300°C for 5 hours, and obtain Supported nano-catalyst 2 for hydrogenation of carbon dioxide to synthesize methanol and carbon monoxide, the analysis spectrum of gas chromatography hydrogen flame ionization detector is shown in Figure 4 .

Embodiment 3

[0029] Weigh 0.4gCu(NO 3 ) 2 ·3H 2 O and 0.1gCo(NO 3 ) 2 ·6H 2 Dissolve O in 10mL deionized water to make it completely dissolved; add 28% ammonia water dropwise to the mixed solution to adjust the pH of the solution to 11; add 1g of silica gel, heat and stir at 80°C until the pH value becomes 6; centrifuge, Pour off the supernatant, wash the solid with deionized water three times, dry at 100°C for 8 hours; roast at 450°C for 6 hours, and reduce with pure hydrogen at 300°C for 5 hours to obtain a supported nanocatalyst for hydrogenation of carbon dioxide to synthesize methanol and carbon monoxide 3. The analysis spectrum of gas chromatography hydrogen flame ionization detector is shown in Figure 5 .

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Abstract

The invention discloses a supported nanocatalyst for catalytic conversion of carbon dioxide. The supported nanocatalyst comprises active component Cu particles, carrier silica gel and an optional auxiliary agent, wherein based on the weight of a carrier, the percentage content of the active component Cu particles is 1-40%, and the percentage content of the auxiliary agent is less than or equal to 20%; the average size of the active component Cu particles is 1-20nm, and the active specific surface areas of the active component Cu particles are 100-400m<2>.g<-1>. The invention further discloses a preparation method of the supported nanocatalyst and application of the supported nanocatalyst for catalytic conversion of carbon dioxide in the synthesis of methanol by virtue of a carbon dioxide hydrogenation reaction and the carbon monoxide reaction.

Description

Technical field: [0001] The invention belongs to the technical field of activation and utilization of carbon dioxide, and in particular relates to a supported nano-catalyst for catalytic conversion of carbon dioxide and its preparation method and application. Background technique: [0002] Carbon dioxide is a greenhouse gas. In recent decades, the global warming caused by its massive production and continuous emission has attracted widespread attention from all walks of life. Carbon dioxide in the atmosphere mainly comes from the burning and utilization of fossil fuels. The International Energy Agency predicts that until 2030, fossil fuels will remain the main energy source. Therefore, optimizing the energy structure to reduce carbon dioxide emissions while realizing the capture, storage and catalytic conversion of carbon dioxide has become the focus and focus of attention all over the world. Realizing the catalytic conversion of carbon dioxide can not only alleviate the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/72B01J23/75B01J23/889C07C29/154C07C31/04C01B31/18C01B32/40
CPCY02P20/52
Inventor 王志巧郭国聪徐忠宁张明建彭思艳陈毓敏陈青松王明盛
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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