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Catalyst for producing high-carbon olefins from a mixture of carbon dioxide and hydrogen, and its preparation and application method

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: 2022-05-06
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 olefins from a mixture of carbon dioxide and hydrogen, and its preparation and application method

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 into 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 temper...

Embodiment 3

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

[0037] Configure 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. 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 un...

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Abstract

The present invention designs a method for producing high-carbon olefins by mixing carbon dioxide and hydrogen. In the present invention, ferrous oxalate, alkali metals, other metals and carbon are compounded, and the ratio of iron to carbon is 0.7:10 to 6:10. The molar ratio of iron and other metals is 10:0.01-10:5, wherein the mass fraction of alkali metals in the catalyst is 1%-10%; alkali metals are one or more of Na, K and Rb, and other metals One or more of Mn, Zn, Cu and Co. The catalyst of the present invention greatly improves the activity of the catalyst and the selectivity of high-carbon olefin products, provides a new idea for the conversion process of carbon dioxide selective hydrogenation to produce high value-added chemicals, and 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 Patents(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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