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Activated carbon-supported copper-metal oxide catalyst and its preparation method and application

A technology of activated carbon and oxides, which is applied in the direction of metal/metal oxide/metal hydroxide catalysts, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve problems such as weak interactions, improve selectivity, improve ethanol Hydrogen activity, high activity effect

Active Publication Date: 2018-08-21
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the low Hüttig temperature (134°C) of copper and the weak interaction between it and the activated carbon support, copper nanoparticles are easy to sinter and grow on the surface of activated carbon, so copper-based catalysts are usually rarely supported by activated carbon.

Method used

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  • Activated carbon-supported copper-metal oxide catalyst and its preparation method and application
  • Activated carbon-supported copper-metal oxide catalyst and its preparation method and application
  • Activated carbon-supported copper-metal oxide catalyst and its preparation method and application

Examples

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Effect test

Embodiment 1

[0046] 0.7603g copper nitrate (Cu(NO 3 ) 2 ·3H 2 O) and 0.4555g cerium nitrate (Ce(NO 3 ) 3 ·6H 2 O) Added into 10ml of deionized water, after it was dissolved and mixed uniformly, 2g of columnar activated carbon particles were added therein and soaked for 4h. The above mixture was first dried on a rotary evaporator at 50° C. and 0.09 MPa for 3 hours, and then dried at 80° C. and 0.09 MPa for 2 hours. The dried solid matter was calcined in a tube furnace at 450° C. for 3 h in a nitrogen atmosphere to obtain catalyst A. Its metal Cu loading is 8.4wt%, CeO 2 The loading capacity of the catalyst is 7.6wt%, and the rest is an activated carbon carrier; the obtained catalyst is a columnar particle with a diameter of 0.8mm and a length of 3-8mm, and the radial average strength of the particle is 124.2N / cm; its specific surface area is 1001.3m 2 / g, the most probable pore diameter is 2.9nm, and the pore volume is 0.49ml / g.

Embodiment 2

[0048] The preparation method of catalyst B is the same as in Example 1, but the impregnating solvent is changed into dehydrated alcohol. Its metal Cu weight content is 8.4wt%, CeO 2 The loading capacity of the catalyst is 7.6wt%, and the rest is activated carbon carrier; the obtained catalyst is a columnar particle with a diameter of 0.8mm and a length of 3-8mm, and the radial average strength of the particle is 123.5N / cm; its specific surface area is 1005.8m 2 / g, the most probable pore diameter is 2.8nm, and the pore volume is 0.49ml / g.

Embodiment 3

[0050] The preparation method of catalyst C is the same as embodiment 2, but cerium nitrate (Ce(NO 3 ) 3 ·6H 2 O) has a mass of 0.6833g. Its metal Cu weight content is 8.1wt%, CeO 2 The loading capacity of the catalyst is 10.9wt%, and the rest is activated carbon carrier; the obtained catalyst is a columnar particle with a diameter of 0.8mm and a length of 3-8mm, and the radial average strength of the particle is 117.1N / cm; its specific surface area is 988.4m 2 / g, the most probable pore diameter is 2.9nm, and the pore volume is 0.45ml / g.

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Abstract

The invention provides an activated carbon-supported copper-metal oxide catalyst and its preparation method and application. The catalyst is composed of the following mass percentage components: carrier activated carbon 55% to 98%, metal Cu 1% to 20% , metal oxide MOx 1% to 25%; the catalyst of the present invention is easy to prepare and low in cost, and can be used in the reaction of ethanol dehydrogenation and condensation to produce n-butanol. When applied, a fixed-bed continuous reaction is used, the process is simple, and the reaction conditions are relatively mild , the yield of n-butanol in the product reaches 10wt%~30wt%, and the unreacted ethanol after product separation can be recycled and reused.

Description

(1) Technical field [0001] The present invention relates to a kind of activated carbon supported copper-metal oxide catalyst (Cu-MO x / AC) and its preparation method and application, the catalyst can be used for ethanol dehydrogenation condensation to prepare n-butanol. (2) Background technology [0002] Due to the depletion of fossil resources and the greenhouse effect caused by their use, the development and utilization of renewable biomass fuels has attracted more and more attention. As a renewable biomass fuel, bioethanol has been widely used as a gasoline blending component in many countries in Europe, America, and Asia. However, ethanol has problems such as strong hygroscopicity, low energy density, and corrosion of engine cylinders, so it is not an ideal gasoline blending component. Butanol is insoluble in water, has high energy density, and is less corrosive to automobile engines. Compared with ethanol, it can be mixed with gasoline at a higher ratio (20% vs 10%), ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/78B01J23/83B01J35/10C07C29/34C07C31/12
CPCC07C29/34B01J23/78B01J23/83B01J35/618B01J35/617B01J35/633B01J35/635B01J35/643B01J35/638B01J35/647C07C31/12
Inventor 江大好吴先元倪珺李小年
Owner ZHEJIANG UNIV OF TECH
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