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Application of alpha-molybdenum carbide and metal-modified alpha-molybdenum carbide catalyst to reaction for preparing carbon monoxide through hydrogenation of carbon dioxide

A metal modification, carbon dioxide technology, applied in the directions of carbon monoxide, physical/chemical process catalyst, chemical/physical process, etc., can solve problems that have not yet been seen, achieve high and low temperature activity and CO selectivity, solve thermal sintering and cost. low effect

Active Publication Date: 2016-05-04
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there have been no relevant reports on the application of α-molybdenum carbide and its metal-modified α-molybdenum carbide catalysts in the hydrogenation of carbon dioxide to carbon monoxide.

Method used

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  • Application of alpha-molybdenum carbide and metal-modified alpha-molybdenum carbide catalyst to reaction for preparing carbon monoxide through hydrogenation of carbon dioxide
  • Application of alpha-molybdenum carbide and metal-modified alpha-molybdenum carbide catalyst to reaction for preparing carbon monoxide through hydrogenation of carbon dioxide
  • Application of alpha-molybdenum carbide and metal-modified alpha-molybdenum carbide catalyst to reaction for preparing carbon monoxide through hydrogenation of carbon dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1α-MoC 1-x preparation and activity evaluation

[0038] (1) Preparation

[0039] Take 1.2gMoO 3 (40-60 mesh) samples are placed in a quartz reactor, and 150ml / min of pure NH 3 Atmosphere, from room temperature to the final nitriding temperature of 700 °C at a heating rate of 5 °C / min, and kept for 2 hours, then cooled to room temperature, and the reaction gas was switched to 20% CH 4 / H 2 (150mL / min) mixed gas, and then raised to the final carbonization temperature of 700°C at a heating rate of 5°C / min, and kept for 2h. Then after cooling down to room temperature, in 1% O 2 / Ar atmosphere passivation for 12h to obtain α-MoC 1-x Catalyst samples.

[0040] (2) Activity evaluation test

[0041] The carbon dioxide hydrogenation to carbon monoxide reaction is carried out in a quartz tube fixed-bed reactor with an inner diameter of 4mm. The flow rate of each gas required for the experiment is regulated and controlled by a mass flow meter, and flows into the r...

Embodiment 2

[0048] Example 2α-MoC 1-x stability test

[0049] This example is α-MoC 1-x The 40h stability test of the catalyst, the catalyst preparation and activity evaluation test conditions during the process were the same as those in Example 1, except that the stability test temperature was 600°C. It can be seen that within 40 hours, the reaction activity of the catalyst only decreased by about 5%, and it has better thermal stability than the commercial Cu-Zn-Al catalyst.

Embodiment 31

[0052] Example 31%Pt / α-MoC 1-x preparation and activity evaluation

[0053] (1) Preparation

[0054] 3%Pt / α-MoC Prepared by Isovolumetric Impregnation Method 1-x Catalyst: Weigh 3g of α-MoC prepared in Example 1 at room temperature 1-x The carrier is mixed with a certain concentration of chloroplatinic acid solution (the mass of chloroplatinic acid is 0.0796g, the volume of deionized water is 4.2ml), the impregnated product is left to stand overnight, and dried in a vacuum oven at 60°C for 12h to obtain 1% Pt / α-MoC 1-x catalyst;

[0055] (2) Activity evaluation test

[0056] The carbon dioxide hydrogenation to carbon monoxide reaction is carried out in a quartz tube fixed-bed reactor with an inner diameter of 4 mm. The flow rate of each gas required for the experiment is regulated and controlled by a mass flow meter, and flows into the reactor after mixing.

[0057] Weigh 30mg of 1%Pt / α-MoC 1-x (40-60 mesh) catalyst and 0.12g of quartz sand (40-60 mesh) are placed in a...

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Abstract

The invention discloses an application of alpha-molybdenum carbide or metal-modified alpha-molybdenum carbide as a catalyst to a reaction for preparing carbon monoxide through hydrogenation of carbon dioxide. In the reaction for preparing carbon monoxide through hydrogenation of carbon dioxide, the reaction atmosphere is a mixed gas of CO2 and H2, the reaction pressure is normal pressure, and the reaction temperature is 300-600 DEG C. The alpha-molybdenum carbide and metal-modified alpha-molybdenum carbide catalysts are low in cost and easy to prepare, and have relatively high low-temperature activity and CO selectivity and excellent thermal stability when applied to the reaction for preparing carbon monoxide through hydrogenation of carbon dioxide. The catalyst can meet the operating requirements of reaction situations of high temperature and strong reduction in the reaction for preparing carbon monoxide through hydrogenation of carbon dioxide, and therefore, has bright application prospects in the field of CO2 catalytic conversion and utilization.

Description

technical field [0001] The invention belongs to the technical field of carbon dioxide conversion and utilization, in particular to α-type molybdenum carbide (α-MoC 1-x ) Catalyst in carbon dioxide hydrogenation to carbon monoxide reaction. Background technique [0002] In recent years, due to CO 2 Environmental problems such as greenhouse effect, seawater acidification, and climate warming caused by massive emissions are becoming more and more serious, threatening the survival and development of human beings. Therefore, CO 2 Emission reduction and resource utilization have become the focus of attention of countries all over the world. CO 2 It is an economical, safe and renewable carbon resource, which can be catalytically converted into syngas, methanol, light olefins, aldehydes, acids, ethers, esters and other chemicals through chemical action. Related research has become increasingly active in the past few decades . [0003] CO 2 Catalytic hydrogenation to CO and H ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/18B01J27/22C01B32/40
CPCB01J27/22
Inventor 石川朱晓兵张晓宋泽昌于涛
Owner DALIAN UNIV OF TECH
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