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Catalyst for producing high-carbon olefin from mixed gas of carbon dioxide and hydrogen as well as preparation method and application method of catalyst

A carbon dioxide and high-carbon olefin technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low C4+ olefin selectivity and difficulty in realizing industrialization.

Active Publication Date: 2021-06-18
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The iron-based catalysts reported in the previous literature are used for CO2 hydrogenation to prepare C4+ olefins, but the selectivity of C4+ olefins is low, and it is difficult to realize industrialization

Method used

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  • Catalyst for producing high-carbon olefin from mixed gas of carbon dioxide and hydrogen as well as preparation method and application method of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The composite catalyst preparation process is as follows:

[0029] Prepare 50mL of 0.6mol / L hydrochloric acid solution, after cooling in ice water at 0-4°C, weigh 6 grams of FeC2O4·2H2O solid, add it to hydrochloric acid for ultrasonic dissolution, then weigh 1.6 grams of KCl solid and 0.6 grams of ZnCl2 solid into the above The solution was ultrasonically dissolved, and the dissolved solution was heated in a water bath at 60°C to evaporate excess acid and water, then transferred to an oven, and dried at 100°C for 10 hours. That is, the prepared catalyst is Fe-K-Zn. Take 9 grams of carbon nanotubes, mix them with the above-mentioned obtained Fe-K-Zn catalyst powder grinding machinery, and press tablet molding, and the prepared catalyst is designated as Fe-K-Zn / C-I.

[0030] The prepared catalyst is applied to the catalytic reaction of CO2 hydrogenation conversion to olefins. The catalyst was first activated in situ at 400 °C for 8 h under hydrogen. After reduction, t...

Embodiment 2

[0032] The composite catalyst preparation process is as follows:

[0033] Prepare 100mL of 0.6mol / L hydrochloric acid solution, after ice-water cooling, weigh 6 grams of FeC2O4·2H2O powder, add it to hydrochloric acid for ultrasonic dissolution, then weigh 1.6 grams of KCl powder and 0.9mL of 50% Mn(NO3)2 solution and add The above solution was ultrasonically dissolved, and the dissolved solution was heated in a water bath at 60°C to evaporate excess acid and water, then transferred to an oven, and dried at 100°C for 10 hours. That is, the obtained catalyst is Fe-K-Mn. Take by weighing 9 grams of activated carbon, mix with the above-mentioned obtained Fe-K-Mn catalyst powder grinding machine, tablet molding, and the prepared catalyst is designated as Fe-K-Mn / C.

[0034] The prepared catalyst is applied to the catalytic reaction of CO2 hydrogenation conversion to olefins. The catalyst was first activated in situ at 400 °C for 8 h under hydrogen. After reduction, the temperat...

Embodiment 3

[0036] The composite catalyst preparation process is as follows:

[0037] Prepare 100mL of 0.6mol / L hydrochloric acid solution, after ice-water cooling, weigh 6 grams of FeC2O4 2H2O powder, add it to hydrochloric acid for ultrasonic dissolution, then weigh 1.6 grams of KCl solid and 0.3 grams of ZnCl2 solid, 50% Mn(NO3) 2 Solution 0.45mL was added to the above solution for ultrasonic dissolution, and the dissolved solution was heated in a water bath at 60°C to evaporate excess acid and water, then transferred to an oven, and dried at 100°C for 10 hours. That is, the obtained catalyst is Fe-K-Zn-Mn. Take by weighing 9 grams of activated carbon, mix with the above-mentioned obtained Fe-K-Zn-Mn catalyst powder grinding machine, and press tablet molding, and the prepared catalyst is designated as Fe-K-Zn-Mn / C.

[0038] The prepared catalyst is applied to the catalytic reaction of CO2 hydrogenation conversion to olefins. The catalyst was first activated in situ at 400 °C for 8 h ...

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Abstract

The invention designs a method for producing high-carbon olefin from mixed gas of carbon dioxide and hydrogen. According to the invention, ferrous oxalate, alkali metal, other metals and carbon are compounded, a ratio of iron to carbon is 0.7: 10 to 6: 10, a molar ratio of iron to other metals is 10: 0.01 to 10: 5, and the mass fraction of the alkali metal in a catalyst is 1-10%; the alkali metal is one or more selected from Na, K and Rb; and the other metal is one or more selected from Mn, Zn, Cu and Co. According to the catalyst, the activity of the catalyst and the selectivity of high-carbon olefin products are greatly improved, a new thought is provided for the conversion process of preparing high-added-value chemicals through selective hydrogenation of carbon dioxide, and the catalyst has good industrial application prospects.

Description

technical field [0001] The invention relates to the technical field of carbon dioxide conversion, in particular to the application field of producing high-carbon olefins by hydrogenation of carbon dioxide. Background technique [0002] Olefins are an important class of industrial basic raw materials, and the global annual consumption of olefins is increasing year by year. The preparation of olefins from non-petroleum routes has important strategic significance for oil-poor countries like China. Low-carbon olefins mainly refer to ethylene and propylene, which are the basic organic raw materials for various chemical products such as synthetic plastics and fibers. Higher olefins generally refer to olefins with 4 or more carbon atoms. Olefins with a carbon number in the range of C4-C18 are widely used and can be widely used in the production of lubricating oils, plasticizers and detergents. At present, both low-carbon olefins and high-carbon olefins are mainly produced from pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80B01J23/889C07C1/12C07C11/02
CPCB01J23/80B01J23/8892C07C1/12C07C11/02
Inventor 方传艳孙剑葛庆杰
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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