Preparation method and application of Cu-Co catalyst to preparation of ethanol by synthetic gas

A technology for catalysts and ethanol production, which is applied in the direction of catalyst activation/preparation, preparation of organic compounds, chemical instruments and methods, etc. It can solve problems such as uneven distribution of active components of CuCo catalysts, and achieve the effect of improving activity

Inactive Publication Date: 2018-01-05
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional CuCo catalyst is prepared by co-precipitation method, because its solution also contains Cu 2+ ,Co 2+ , CO 3 2 + ,OH - Plasma, Cu 2+ and Co 2+ There is a competitive relationship between precipitation and exchange, and the resulting precursor contains part of Cu 2 (CO 3 )(OH) 2 and Co 2 (CO 3 )(OH) 2 , the active components of the prepared CuCo catalyst were not evenly distributed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Under the condition of T=65℃, 50ml of 0.5mol / L Cu(NO 3 ) 2 The solution was added dropwise to the NaHCO 3 0.5mol / L NaHCO 3 The pH of the solution was adjusted to maintain at 7.0. After the reaction was completed, it was aged for 0.5 h, filtered and washed 4 times, and then slurried. Then, under the conditions of T=60°C and slurry pH=8.0, 125ml of 0.05mol Co(NO 3 ) 2 Add it dropwise into the slurry liquid to carry out the metal ion exchange reaction. After the reaction is completed, place the precipitated mother liquor in a microwave chemical reactor, stir and age under microwave radiation at a temperature of 60°C for 0.5 hours, and then wash it with deionized water for 5 times. Dry at 80°C for 16 hours to obtain the precursor, and finally bake at 300°C for 5 hours to obtain the finished catalyst. The catalyst is composed of CuCo bimetal, and the Co / Cu molar ratio is 0.3.

[0031] Add 3g of Cu-Co catalyst into a 500ml reactor, reduce it at 0.2MPa 240°C for 6h, and ...

Embodiment 2

[0033] Under the condition of T=70℃, 250ml of 0.1mol / L Cu(CH 3 COO) 2 The solution was dripped dropwise into the K 2 CO 3 Add 0.3mol / L KOH solution to the 100ml mixed solution with pH = 7.5 and KOH at the same time to adjust the pH to 7.5. After the reaction is completed, it is aged for 1 hour, filtered and washed 5 times, and then slurried. Then, under the conditions of T=65°C and slurry pH=8.2, 212.5ml of 0.1mol Co(CH 3 COO) 2 Add it dropwise into the slurry liquid to carry out the metal ion exchange reaction. After the reaction is completed, place the precipitated mother liquor in a microwave chemical reactor, stir and age under microwave radiation temperature control at 70°C for 1 hour, and then wash it with deionized water for 6 times. Dry at 100°C for 14 hours to obtain the precursor, and finally bake at 400°C for 4 hours to obtain the finished catalyst. The catalyst is composed of CuCo bimetal with a Co / Cu molar ratio of 0.8.

[0034] Add 3g of Cu-Co catalyst into...

Embodiment 3

[0036] Under the condition of T=75℃, 500ml of 0.05mol / L CuSO 4 The solution was added dropwise into the NH 3 h 2 O and CH 3 0.1mol / L NH 3 h 2 The pH of the O solution was adjusted to maintain at 8.0. After the reaction was completed, it was aged for 0.8 h, filtered and washed 6 times, and then slurried. Then, under the conditions of T=70°C and slurry pH=8.4, 165ml of 0.3mol CoCl 2 Add it dropwise into the slurry liquid to carry out the metal ion exchange reaction. After the reaction is completed, place the precipitated mother liquor in a microwave chemical reactor, stir and age under microwave radiation temperature control at 80°C for 1.5 hours, and then wash it with deionized water for 7 times. Dry at 110°C for 12 hours to obtain the precursor, and finally bake at 500°C for 3 hours to obtain the finished catalyst. The catalyst is composed of CuCo bimetal with a Co / Cu molar ratio of 2.

[0037] Add 3g of Cu-Co catalyst to a 500ml reactor, reduce it at 0.2MPa 240°C for 6...

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Abstract

The invention discloses a preparation method of a Cu-Co catalyst for the preparation of ethanol by synthetic gas. The method comprises the following steps: firstly synthesizing a single Cu2(OH)2CO3 orCo2(OH)2CO3 phase by using a homogeneous precipitation method, then preparing a single (Cu, Co)2(OH)2CO3 precursor phase with mutual atomic level dispersion through Co<2+> / Cu<2+> ion exchange and finally forming the Cu-Co catalyst with uniform Cu-Co dispersion, single surface structure and stronger synergistic effect by using a microwave radiation treatment precursor.

Description

technical field [0001] The invention belongs to a preparation method and application of a catalyst, in particular to a Cu-Co catalyst for producing ethanol from synthesis gas, a preparation method and an application. Background technique [0002] With the shortage of petroleum resources, the development of alternative energy sources is of great significance to alleviate energy pressure and protect the environment. As a high-quality liquid fuel, ethanol is low in sulfur, non-toxic, and less harmful to the human body. It is considered to be one of the best alternative energy sources. [0003] At present, the production methods of ethanol include grain fermentation method, wood hydrolysis method, ethylene indirect hydration method, ethylene direct hydration method, acetaldehyde hydrogenation method, carbon monoxide (carbon dioxide) and hydrogen oxo synthesis method, etc. Among them, the low-carbon alcohol mixture mainly composed of ethanol is directly prepared from coal throug...

Claims

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Application Information

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IPC IPC(8): B01J23/75B01J37/03B01J37/30B01J37/34B01J37/08B01J37/18C07C29/156C07C31/08
Inventor 郑华艳付华李忠章敏张华成
Owner TAIYUAN UNIV OF TECH
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