Preparation method and application of papermaking sludge activated carbon supported cu-co catalyst

A technology for papermaking sludge and activated carbon, which is applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of lack of good surface active sites, low furfural conversion rate and low furfuryl alcohol selectivity, etc. Achieve the effect of reducing preparation cost, improving selectivity and high catalytic performance

Active Publication Date: 2022-03-01
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the preparation of furfuryl alcohol by catalytic hydrogenation of furfural, Cu-Co is a commonly used catalyst, which can effectively improve the conversion rate and selectivity of the catalytic reaction. In the prior art, wood or fruit shell activated carbon or nanomaterials are used as carriers. Cu-Co is used as the active ingredient as the catalyst, but the conversion rate of furfural and the selectivity of furfuryl alcohol are low due to the absence of good surface active sites on this catalyst carrier.

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  • Preparation method and application of papermaking sludge activated carbon supported cu-co catalyst
  • Preparation method and application of papermaking sludge activated carbon supported cu-co catalyst
  • Preparation method and application of papermaking sludge activated carbon supported cu-co catalyst

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Effect test

Embodiment 1

[0028] Preparation method and application of papermaking sludge activated carbon supported CU-CO catalyst:

[0029] The preparation method includes the following steps:

[0030] (1) The secondary sludge obtained from the paper mill is dried and pulverized into fine powder, and pretreated at 500 °C for 2 hours under N2 atmosphere to obtain pre-carbonized material. The obtained pre-carbonized material and KOH are in a mass ratio of 1:1: The ratio of 2 was mixed and ground evenly, put it into an iron crucible, put it into a tube furnace, and in a N2 atmosphere, the temperature was raised to 450 °C, 600 °C and 800 °C at a heating rate of 5 °C / min, respectively, and calcined for 1 h to obtain three kinds of carbonized material;

[0031] (2) Put the carbonized material in step (1) into a beaker, add deionized water, stir magnetically for 6 hours at room temperature, filter with suction, wash with a large amount of deionized water for several times until the washing solution is neut...

Embodiment 2

[0036] Preparation method and application of papermaking sludge activated carbon supported CU-CO catalyst:

[0037] The preparation method includes the following steps:

[0038] (1) The secondary sludge obtained from the paper mill is dried and pulverized into fine powder, in N 2 The pre-carbonized material was pretreated at 500 °C for 2 hours in the atmosphere, and the obtained pre-carbonized material and KOH were mixed and ground evenly according to the mass ratio (hereinafter referred to as carbon-alkali ratio) of 1:1, 1:2 and 1:3 respectively. Put in iron crucible, put in tube furnace, in N 2 Under the atmosphere, the heating rate was raised to 600 °C at a heating rate of 5 °C / min, and calcined for 1 h to obtain three carbonized materials;

[0039] (2) Put the carbonized material in step (1) into a beaker, add deionized water, stir magnetically for 6 hours at room temperature, filter with suction, wash with a large amount of deionized water for several times until the wash...

Embodiment 3

[0044] Preparation method and application of papermaking sludge activated carbon supported CU-CO catalyst:

[0045] The preparation method includes the following steps:

[0046] (1) The secondary sludge obtained from the paper mill is dried and pulverized into fine powder, in N 2 The pre-carbonized material was pretreated at 500 °C for 2 hours in the atmosphere, and the obtained pre-carbonized material and KOH were mixed and ground evenly in a mass ratio of 1:2, put into an iron crucible, and put into a tube furnace. 2 Under the atmosphere, the heating rate was raised to 600 °C at a heating rate of 5 °C / min, and calcined for 1 h to obtain carbonized material;

[0047] (2) Put the carbonized material in step (1) into a beaker, add deionized water, stir magnetically for 6 hours at room temperature, filter with suction, and wash with a large amount of deionized water for several times until the washing solution is neutral;

[0048] (3) Take 0.9g of the powder in step (2) and pu...

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Abstract

The present invention relates to the preparation method and application thereof of papermaking sludge activated carbon loaded CU-CO catalyst, belongs to the technical field of furfural catalytic hydrogenation, the present invention uses the secondary sludge of paper pulp / paper mill in N 2 Pre-carbonization is carried out under the atmosphere, and after the pre-carbonization material is treated with an activator, it is also heated in N 2 Carbonize under atmosphere to obtain carbonized material; wash the carbonized material to neutrality and then dry to obtain activated carbon carrier powder; mix the activated carbon carrier powder, copper nitrate hexahydrate and cobalt nitrate trihydrate evenly, wash and evaporate, then dry, take out placed in N 2 Medium H 2 Calcination and reduction were carried out under the atmosphere to obtain paper sludge-based activated carbon-supported Cu-Co bimetallic catalyst. This catalyst was applied to the selective hydrogenation of furfural. The conversion rate of furfural reached 100.00%, and the selectivity of furfuryl alcohol reached 95.60%. The catalytic activity is high, the preparation process is simple, the catalytic life is long, and the resource utilization of solid waste is realized, which is in line with environmental economics and green chemistry, and has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of furfural catalytic hydrogenation, and in particular relates to a preparation method and application of a paper-making sludge activated carbon-loaded CU-CO catalyst. Background technique [0002] With the gradual reduction of fossil resources such as oil and natural gas, and in order to solve the problems of climate change and environmental pollution caused by the large-scale exploitation of fossil resources, the environmentally friendly development and utilization of biomass resources, especially lignocellulosic materials, has become imperative. Must do. To this end, the researchers proposed the concept of biorefinery to closely link renewable lignocellulose with the production of chemicals. Furfural and its derivatives, as important platform chemical molecules in biomass conversion, can be obtained by catalytic hydrolysis of lignocellulose. It is widely derived from agricultural and forestry wastes suc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/75B01J37/08B01J37/02B01J37/18C07D307/44
CPCB01J23/75B01J35/10B01J37/084B01J37/0201B01J37/18C07D307/44
Inventor 关清卿沈雷何亮宁平
Owner KUNMING UNIV OF SCI & TECH
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