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Catalyst for preparing low-carbon olefin through carbon dioxide hydrogenation and preparation method thereof

A carbon dioxide and low-carbon olefin technology, which can be used in metal/metal oxide/metal hydroxide catalysts, hydrocarbon production from carbon oxides, carbon compound catalysts, etc., and can solve the problems of poor activity and selectivity of low-carbon olefin catalysts. Achieve the effect of improving catalytic activity and selectivity, enhancing adsorption, and ensuring controllability

Active Publication Date: 2021-12-17
HUANENG CLEAN ENERGY RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the shortcomings of low-carbon olefin catalysts in the prior art that are not tolerant to the influence of hydrogen-to-carbon ratio fluctuation range, and the activity and selectivity of low-carbon olefin catalysts are relatively poor, thereby providing a carbon dioxide adding Catalyst for hydrogenation of low-carbon olefins and preparation method thereof

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  • Catalyst for preparing low-carbon olefin through carbon dioxide hydrogenation and preparation method thereof

Examples

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Embodiment 1

[0041] This embodiment provides a catalyst for the hydrogenation of carbon dioxide to light olefins, the raw material of which includes Fe(NO 3 ) 3 , FeSO 4 , Mg(NO 3 ) 2 , triethylamine and ammonium bicarbonate.

[0042] The present embodiment also provides that the preparation method of above-mentioned catalyst comprises the following steps:

[0043] (1) Fe(NO 3 ) 3 , FeSO 4 , Mg(NO 3 ) 2 , adding water to prepare Fe 3+ , Fe 2 and Mg 2+ Mixed solutions A with molar concentrations of 0.08mol / L, 0.02mol / L, and 0.1mol / L respectively, set aside;

[0044] Mix triethylamine, ammonium bicarbonate and water to prepare mixed solution B, and the molar concentrations of triethylamine and ammonium bicarbonate in mixed solution B are 0.1mol / L and 0.1mol / L respectively, and set aside;

[0045] Add 50mL mixed solution B to 200mL deionized water, and add mixed solution A and mixed solution B dropwise at 60°C under an atmosphere of carbon dioxide at the same time, at a rate of 1...

Embodiment 2

[0048] This example provides a catalyst for the hydrogenation of carbon dioxide to produce low-carbon olefins, the raw material of which includes FeCl 3 , FeCl 2 , MgCl 2 , diethylamine and ammonium bicarbonate.

[0049] The present embodiment also provides that the preparation method of above-mentioned catalyst comprises the following steps:

[0050] (1) Take FeCl 3 , FeCl 2 , MgCl 2 , adding water to prepare Fe 3+ , Fe 2 and Mg 2+ Mixed solutions A with molar concentrations of 0.1mol / L, 0.35mol / L, and 0.15mol / L respectively, set aside;

[0051] Mix diethylamine, ammonium bicarbonate and water to prepare mixed solution B. The molar concentrations of diethylamine and ammonium bicarbonate in mixed solution B are 1mol / L and 0.01mol / L respectively, and set aside;

[0052] Add 20mL of mixed solution B to 200mL of deionized water, and add mixed solution A and mixed solution B dropwise at 90°C under an atmosphere of carbon dioxide at the same time, at a rate of 3mL / min and ...

Embodiment 3

[0055] This embodiment provides a catalyst for producing low-carbon olefins by hydrogenation of carbon dioxide, the raw material of which includes Fe 2 (SO 4 ) 3 , FeSO 4 , MgSO 4 , tetraethylammonium hydroxide and ammonium bicarbonate.

[0056] The present embodiment also provides that the preparation method of above-mentioned catalyst comprises the following steps:

[0057] (1) Take Fe 2 (SO 4 ) 3 , FeSO 4 , MgSO 4 , adding water to prepare Fe 3+ , Fe 2 and Mg 2+ Mixed solution A with a molar concentration of 0.003mol / L, 0.005mol / L, and 0.004mol / L respectively, set aside;

[0058] Tetraethylammonium hydroxide solution, ammonium bicarbonate and water are mixed and formulated into mixed solution B, and the molar concentrations of tetraethylammonium hydroxide solution and ammonium bicarbonate in mixed solution B are respectively 0.01mol / L, 1mol / L, spare;

[0059] Add 50mL of mixed solution B to 200mL of deionized water, and add mixed solution A and mixed solution ...

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Abstract

The invention belongs to the technical field of carbon dioxide recycling, and particularly relates to a catalyst for preparing low-carbon olefin through carbon dioxide hydrogenation and a preparation method thereof. The raw materials of the catalyst comprise ferric salt, magnesium salt, organic amine and ammonium bicarbonate, and the catalyst can adapt to a wide raw material carbon-hydrogen ratio and also has high catalytic activity and selectivity. The iron content in the catalyst is relatively high, and organic amine and ammonium bicarbonate are used as raw materials of the catalyst, so that the controllability of a precipitation process is ensured, atomic-scale dispersion of iron and magnesium is ensured, proper active sites are generated, proper interlayer ions and molecules are also inserted, the lamellar spacing is adjusted, and meanwhile, other metal impurity ions cannot be introduced.

Description

technical field [0001] The invention belongs to the technical field of carbon dioxide reuse, and in particular relates to a catalyst for producing low-carbon olefins through hydrogenation of carbon dioxide and a preparation method thereof. Background technique [0002] The impact of carbon dioxide on climate change has attracted more and more attention. Carbon dioxide is a greenhouse gas, but it is also an important carbon source. Converting carbon dioxide into fuel and materials is an important way to achieve sustainable development. Hydrogenation reaction of hydrogen obtained from renewable energy and carbon dioxide can obtain various valuable chemicals such as carbon monoxide, methane, light olefins, gasoline, and aromatics. Among them, light olefins are one of the most basic raw materials in the chemical industry. [0003] The traditional synthesis process of low-carbon olefins usually uses petroleum, coal or natural gas as raw materials, and this process emits more ca...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J23/78C07C1/12C07C11/02
CPCB01J27/24B01J23/78C07C1/12C07C2527/24C07C2523/78C07C11/02Y02P20/52
Inventor 王琪肖平徐越吴桐程阿超秦晔
Owner HUANENG CLEAN ENERGY RES INST
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