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co 2 Carbon-containing iron-based catalyst for hydrogenation of hydrocarbons and preparation method thereof

A catalyst and hydrocarbon production technology, applied in the field of catalysis, can solve the problems of difficult activation, loss of alkali metal, influence on catalyst stability, etc., and achieve the effect of good catalytic performance, favorable for anchoring, and improved catalytic performance

Active Publication Date: 2021-11-23
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

and due to CO 2 It is a very stable molecule, relatively difficult to activate, and the carbon-carbon coupling energy barrier is high, so CO 2 The hydrogenation reaction needs to be carried out under high temperature and high pressure conditions, and a large amount of water will be generated during the reaction
The metal particles on the catalyst are easy to sinter during the reaction, and the alkali metal will be lost during the reaction, which has a great impact on the stability of the catalyst
At present, it is still a challenge to prepare iron-based catalysts with high activity and high stability.

Method used

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  • co <sub>2</sub> Carbon-containing iron-based catalyst for hydrogenation of hydrocarbons and preparation method thereof
  • co <sub>2</sub> Carbon-containing iron-based catalyst for hydrogenation of hydrocarbons and preparation method thereof
  • co <sub>2</sub> Carbon-containing iron-based catalyst for hydrogenation of hydrocarbons and preparation method thereof

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Embodiment

[0036] 12mmol containing a certain proportion of Zn(NO 3 ) 2 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 The mixture of O was dissolved in 120mL of methanol to form a transparent solution, and the adjustment of Zn / Co was 89, 59, 39, 19 and 5 (molar ratio); 48mmol of 2-methylimidazole was dissolved in 40mL of methanol to obtain another solution, Then the former was added to the latter, stirred at room temperature for 24 hours, centrifuged, washed, and dried; 0.5 g of iron acetylacetonate was added to 30 mL of methanol, and then 0.8 g of the above-mentioned synthesized bimetallic ZIFs were added to iron acetylacetonate. methanol solution, and after stirring at room temperature for 1 h, the temperature was raised to 65 ° C to completely evaporate the methanol; the porcelain boat equipped with bimetallic ZIFs introduced with iron acetylacetonate was placed in a tube furnace, and the 2 In the atmosphere, the temperature was raised to 550 °C at a heating rate of 5 °C / min, and kept at 550 °C ...

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Abstract

The present invention provides a CO 2 A carbon-containing iron-based catalyst for hydrogenation of hydrocarbons, characterized in that the catalyst uses bimetallic ZIFs as a precursor, and after introducing an iron source, it is prepared by pyrolysis in an inert atmosphere to obtain Fe 5 C 2 and Fe 3 ZnC 0.5 Nanoparticles, which are iron species, are embedded in a porous carbon matrix to constitute a carbon-containing iron-based catalyst. The present invention also provides CO 2 The invention discloses a preparation method of a carbon-containing iron-based catalyst for hydrogenation of hydrocarbons. Aiming at the problems in the prior art that the iron-based catalyst does not add alkali metal, the catalytic effect is not good, the catalyst stability is poor, and the like, the iron-based catalyst containing porous carbon is designed and prepared. Using ZIFs as precursors, porous carbon materials with better distribution of metal species can be prepared by pyrolysis in an inert atmosphere. The metal particles in ZIFs-derived materials are separated by carbon layers, and the dispersion is good. At the same time, the porosity of carbon materials has Good for CO 2 of adsorption.

Description

technical field [0001] The invention relates to the technical field of catalysis, more specifically, to a high-activity and high-stability CO 2 A carbon-containing iron-based catalyst for hydrogenation of hydrocarbons and a preparation method thereof. Background technique [0002] The abundant and cheap CO 2 As a carbon source, with renewable energy H 2 The production of chemicals through reactions can reduce CO in the atmosphere to a certain extent 2 concentration, while reducing the pressure on fossil fuel consumption. CO 2 Hydrogenation to high value-added hydrocarbons is a way with market potential and application prospects. Iron-based catalysts are most effective at catalyzing CO 2 Catalysts for hydrogenation of hydrocarbons, so iron-based catalysts are widely used in CO 2 In the hydrogenation hydrocarbon reaction. [0003] At present, the addition of alkali metal promoters is required on iron-based catalysts to significantly increase the low-carbon olefins and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C07C1/12C10G2/00C07C11/04C07C11/06C07C11/08
CPCB01J27/24C07C1/12C07C2527/224C10G2/50C07C11/04C07C11/06C07C11/08Y02P20/52
Inventor 郭新闻刘军辉张光辉宋春山
Owner DALIAN UNIV OF TECH
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