Preparation of molybdenum carbide supported nickel-based catalyst and its application in hydrogenation of carbon dioxide to ethanol

A technology for supporting catalysts and carbon dioxide, which is applied in the field of nickel-based catalysts and their preparation and in the production of ethanol by hydrogenation of carbon dioxide, can solve the problems of low product ethanol selectivity, low catalyst conversion rate, high reaction temperature, etc., and achieve the preparation method Simple, large market application value, high catalytic efficiency

Active Publication Date: 2021-07-06
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

But the reaction pressure is as high as 25MPa, and the selectivity of product ethanol is low
Jiang Mianheng reported that the gold catalyst was used in the synthesis of ethanol. The selectivity of the catalyst was very high, basically reaching 100%, but the conversion rate of the catalyst was very low.
[0009] In short, the current various catalytic CO 2 Homogeneous catalysts for hydrogenation of ethanol have strict requirements on reaction conditions and poor stability; heterogeneous catalysts require high reaction temperature, high reaction energy consumption, and low activity

Method used

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  • Preparation of molybdenum carbide supported nickel-based catalyst and its application in hydrogenation of carbon dioxide to ethanol
  • Preparation of molybdenum carbide supported nickel-based catalyst and its application in hydrogenation of carbon dioxide to ethanol
  • Preparation of molybdenum carbide supported nickel-based catalyst and its application in hydrogenation of carbon dioxide to ethanol

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Experimental program
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Effect test

Embodiment 1

[0031] Preparation of 5% Ni / Mo 2 Sample of C: Weigh Ni(NO 3 ) 2 ·nH 2 O 0.0662g, 1.039g (NH 4 ) 6 Mo 7 o 24 4H 2 O was dissolved in deionized water to form a solution. Stir at room temperature for 2 to 3 hours, let stand for 2 hours, then dry at 110°C, and then bake at 550°C for 4 hours in an air atmosphere to obtain NiMoO x composite oxides.

[0032] Shape the composite oxide prepared above (20-40 meshes), weigh the amount of catalyst required for the reaction and place it in a quartz reactor, 4-H 2 (CH 4 / H 2 =1:4) in a mixed atmosphere of temperature-programmed carbonization, when the temperature rises from room temperature to 300°C, the temperature rise rate is 5°C / min, and from 300°C to the final carbonization temperature (700°C), the temperature rise rate is 1°C / min, At the final carbonization temperature, keep the temperature constant for 120 minutes, drop to room temperature in an argon atmosphere, and use 1% O 2 / Ar passivation for 12h, finally get NiMo ...

Embodiment 2

[0034] Preparation of 5% Ni / Mo 2 The sample of C: experiment with the method similar to embodiment 1, the content of preparation nickel becomes 1%, Ni(NO 3 ) 2 ·6H 2 The quality of O was changed to 0.01324g, and other specific steps were referred to Example 1 to obtain product A2.

Embodiment 3

[0036] Carry out experiment with the method similar to embodiment 1, ammonium molybdate is changed into molybdenum oxide, other specific steps refer to embodiment 1, can obtain product B.

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Abstract

The invention provides a nickel-modified molybdenum carbide catalyst and its preparation method and its application in the reaction of carbon dioxide hydrogenation to prepare ethanol. The good hydrogenation ability of nickel and the good ability of molybdenum carbide to activate carbon dioxide make nickel carbide composite bimetallic Compared with non-precious metal catalysts, the catalyst exhibits high selectivity and high activity. Compared with noble metal catalysts, the nickel-molybdenum carbide catalyst has the characteristics of low price and simple preparation.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and in particular relates to a nickel-based catalyst supported by molybdenum carbide and its preparation and application in carbon dioxide hydrogenation to prepare ethanol. Background technique [0002] Carbon dioxide is a common greenhouse gas, a waste gas produced in industrial production. This gas is a cheap, non-toxic, and renewable carbon resource. After enrichment, it can produce low-carbon fuels with high added value such as methane, alcohols, and formic acid. This can not only solve the problem of global warming but also improve the utilization rate of carbon resources, so the comprehensive utilization of carbon dioxide has attracted more and more attention. Carbon dioxide is a thermodynamically extremely stable molecule, how to break the carbon-oxygen bond under mild conditions is a very challenging scientific research topic. Among the common ways of activating carbon dioxide, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/22C07C29/156C07C31/08
CPCB01J27/22C07C29/156C07C31/08
Inventor 黄家辉张少华
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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