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Method for preparing high-carbon linear alpha-olefin through hydrogenation of CO2 and application

An olefin reaction, high-carbon technology, applied in the direction of hydrocarbon production from carbon oxides, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of difficult industrialization and low olefin selectivity , to achieve the effect of promoting high selectivity formation, simple preparation process, and improving carbon chain coupling ability

Inactive 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 α-olefins, but the selectivity of α-C4+ olefins is low, and it is difficult to realize industrialization

Method used

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  • Method for preparing high-carbon linear alpha-olefin through hydrogenation of CO2 and application
  • Method for preparing high-carbon linear alpha-olefin through hydrogenation of CO2 and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The iron catalyst preparation process is as follows:

[0026] Dissolve 10 g of glucose and 12 g of ferric nitrate nonahydrate in 150 mL of deionized water, and stir vigorously. The resulting mixed solution was transferred to a hydrothermal synthesis reactor with a polytetrafluoroethylene liner. The autoclave was sealed and transferred to a hydrothermal synthesis facility. The condition control of the hydrothermal synthesis process is 120° C. for 20 hours. The obtained product distribution was repeatedly washed several times with deionized water and absolute ethanol. Finally, the product was dried for more than 12 hours, and it was taken out, which was recorded as Fe / C. The Fe / C of 1.2g, the potassium carbonate powder of 0.11g, the magnesium oxide powder of 0.018g, the calcium carbonate powder of 0.06g are mechanically mixed in the mode of grinding, and Fe content is 14% in the catalyzer, and the catalyst prepared is denoted as Fe / C-K-Ca-Mg.

[0027] The prepared ca...

Embodiment 2

[0029] The iron catalyst preparation process is as follows:

[0030]Dissolve 10 g of glucose and 12 g of ferric nitrate nonahydrate in 150 mL of deionized water, and stir vigorously. The resulting mixed solution was transferred to a hydrothermal synthesis reactor with a polytetrafluoroethylene liner. The autoclave was sealed and transferred to a hydrothermal synthesis facility. The condition control of the hydrothermal synthesis process is 120° C. for 20 hours. The obtained product distribution was repeatedly washed several times with deionized water and absolute ethanol. Finally, the product was dried for more than 12 hours, and it was taken out, which was recorded as Fe / C. 1.2g of Fe / C, 0.144g of potassium carbonate powder, and 0.048g of magnesium oxide powder were mechanically mixed by grinding, and the prepared catalyst was recorded as Fe / C-K-Mg. The content of Fe in the catalyst is 14%, and the prepared catalyst is recorded as Fe / C-K-Mg.

[0031] The prepared catalys...

Embodiment 3

[0033] The iron catalyst preparation process is as follows:

[0034] Dissolve 10 g of glucose and 12 g of ferric nitrate nonahydrate in 150 mL of deionized water, and stir vigorously. The resulting mixed solution was transferred to a hydrothermal synthesis reactor with a polytetrafluoroethylene liner. The autoclave was sealed and transferred to a hydrothermal synthesis facility. The condition control of the hydrothermal synthesis process is 120° C. for 20 hours. The obtained product distribution was repeatedly washed several times with deionized water and absolute ethanol. Finally, the product was dried for more than 12 hours, and it was taken out, which was recorded as Fe / C. 1.2g of Fe / C, 0.144g of potassium carbonate powder, and 0.204g of calcium carbonate powder were mechanically mixed by grinding, and the prepared catalyst was recorded as Fe / C-K-Ca-I. The content of Fe in the catalyst is 14%, and the prepared catalyst is recorded as Fe / C-K-Ca-I.

[0035] The prepared ...

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Abstract

The invention designs a preparation method and application of a catalyst for preparing high-carbon linear alpha-olefin through hydrogenation of CO2. According to the invention, a carbon-doped Fe catalyst is prepared by adopting a hydrothermal synthesis method, a main active component is Fe, one or more of alkali metal elements selected from K, Mg, Ca and the like are jointly used as an electronic auxiliary agent of the Fe catalyst, so CO2 can be efficiently converted to produce linear alpha-olefin; the addition of the auxiliary agent enhances carbon chain growth ability, and greatly improves the selectivity of a high-carbon linear alpha-olefin product; and a new thought is provided for a high-efficiency conversion process of preparing high-added-value chemicals through selective hydrogenation of carbon dioxide, and the method has relatively 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 linear α-olefins through hydrogenation of carbon dioxide. Background technique [0002] Low-carbon olefins mainly refer to ethylene and propylene, which are the basic organic raw materials for synthetic plastics, fibers and other chemical products. Higher olefins generally refer to olefins with a carbon number of 4 or more, especially alpha-olefins that can be used to produce high value-added fine chemicals are the most important. α-olefins refer to monoolefins with double bonds at the end of the molecular chain (R-CH=CH 2 ), wherein R is an alkyl group. If R is a straight-chain alkyl group, it is called a straight-chain linear a-olefin (LAO). The a-olefins of industrial products have a wide carbon number distribution (C 4 -C 40 ). Widely used is the carbon number range of C 4 -C 18 It can be widely used in ...

Claims

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Application Information

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IPC IPC(8): B01J23/78C07C1/12C07C11/02
CPCB01J23/78C07C1/12C07C11/02
Inventor 孙剑方传艳葛庆杰韩誉
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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