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Graphene macroscopic material photocatalytic reduction of CO 2 Equipment and method for preparing methanol

A graphene and CO2 technology, applied in the field of photocatalysis, can solve the problems that the catalyst cannot be reused multiple times, the service life of the catalyst is shortened, and it cannot be reused multiple times, so as to achieve clean utilization, long service life, novel and unique structure Effect

Active Publication Date: 2017-09-05
XIAN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the existing photocatalytic reaction devices, the catalysts are mostly uniformly mixed in the reaction medium with tiny particles, which makes it difficult to separate the reaction products from the reaction system, and shortens the service life of the catalysts so that they cannot be reused many times.
Obviously, this limits the photocatalytic reduction of CO to some extent 2 Industrialization and application of technology
[0004] Therefore, the development of a photocatalytic reduction of CO using functionalized graphene macroscopic materials 2 The preparation of methanol technology can not only broaden the application of graphene macroscopic materials, but also solve the problem that the catalyst cannot be reused many times in the process of photocatalytic reaction, and has good economic benefits

Method used

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  • Graphene macroscopic material photocatalytic reduction of CO <sub>2</sub> Equipment and method for preparing methanol
  • Graphene macroscopic material photocatalytic reduction of CO <sub>2</sub> Equipment and method for preparing methanol
  • Graphene macroscopic material photocatalytic reduction of CO <sub>2</sub> Equipment and method for preparing methanol

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Embodiment 1

[0049] like Figure 1-2 As shown, the graphene macroscopic material of the present invention photocatalytically reduces CO 2 The equipment for preparing methanol comprises a reaction box 1, the inner wall of the reaction box 1 is provided with a plurality of ultraviolet lamps 6, the reaction box 1 is provided with a reaction bottle 3 for containing the solution medium 2, and the bottom of the reaction bottle 3 A heater 4 for heating the solution medium 2 is provided, the upper part of the reaction bottle 3 communicates with the condensation pipe 7, the condensation pipe 7 communicates with the condensate collection tank 8, and the lower part of the reaction flask 3 passes through CO 2 Pipeline 9 and CO located outside reaction box 1 2 The gas cylinder 11 is connected, and the reaction bottle 3 is provided with a porous partition 12, and the porous partition 12 is provided with a catalyst packing 5, and the CO 2 A flow regulating valve 10 is provided on the pipeline 9 .

[...

Embodiment 2

[0055] combine Figures 1 to 3 , the present embodiment utilizes the equipment described in embodiment 1 to carry out photocatalytic reduction of CO by graphene macroscopic material 2 The method for preparing methanol comprises the following steps:

[0056] Step 1, using anthracite as a raw material to prepare graphene macroscopic materials, the specific process is:

[0057] Step 101, crushing, sieving and ball milling the anthracite successively to obtain particle size D 90 ≤20μm ultra-fine coal powder, then place the ultra-fine coal powder in a graphite crucible and keep it warm for 3 hours at a temperature of 2500°C to obtain graphitized carbon;

[0058] Step 102, using the graphitized carbon described in step 101 as a precursor, adopting the modified Hummers method to prepare coal-based graphene oxide, the specific process is: graphitized carbon, sodium nitrate, potassium permanganate and 98% mass concentration Concentrated sulfuric acid was mixed evenly at a mass ratio...

Embodiment 3

[0071] combine Figures 1 to 3 , the present embodiment utilizes the equipment described in embodiment 1 to carry out photocatalytic reduction of CO by graphene macroscopic material 2 The method for preparing methanol comprises the following steps:

[0072] Step 1, using anthracite as a raw material to prepare graphene macroscopic materials, the specific process is:

[0073] Step 101, crushing, sieving and ball milling the anthracite successively to obtain particle size D 90 ≤20μm ultra-fine coal powder, then place the ultra-fine coal powder in a graphite crucible and keep it warm for 3.5 hours at a temperature of 2500°C to obtain graphitized carbon;

[0074] Step 102, using the graphitized carbon described in step 101 as a precursor, adopting the modified Hummers method to prepare coal-based graphene oxide, the specific process is: graphitized carbon, sodium nitrate, potassium permanganate and 98% mass concentration Concentrated sulfuric acid is mixed evenly at a mass rati...

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Abstract

The invention provides a kind of equipment for preparing methanol by photocatalytic reduction of CO2 made of graphene macroscopic materials, including a reaction box, a plurality of ultraviolet lamps are arranged on the inner wall of the reaction box, and a reaction box for containing a solution medium is arranged in the reaction box. bottle, the bottom of the reaction bottle is provided with a heater for heating the solution medium, the upper part of the reaction bottle communicates with the condensation pipe, the condensation pipe communicates with the condensate collection tank, and the lower part of the reaction bottle The CO2 pipeline is connected with the CO2 gas cylinder outside the reaction box, the reaction cylinder is provided with a porous partition, the porous partition is provided with a catalyst filler, and the CO2 pipeline is provided with a flow regulating valve. The invention also provides a method for preparing methanol by using the device to carry out the photocatalytic reduction of CO2 by the graphene macroscopic material. The invention adopts the graphene macroscopic material as the photocatalyst, which has good catalytic effect, high catalytic efficiency and high methanol yield.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, in particular to a graphene macroscopic material for photocatalytic reduction of CO 2 Equipment and method for preparing methanol. Background technique [0002] As a newcomer in the family of carbon materials, graphene has rapidly become a hot spot in scientific research due to its more and more peculiar physical and chemical properties and its extraordinary performance in many application fields. Graphene is considered all sp 2 The basic structural unit of hybrid carbonaceous materials, which brings new opportunities for the construction of carbonaceous materials with specific structures and functions. Through structural assembly, graphene sheets can construct functionalized graphene macroscopic materials with specific structures, reflecting the excellent properties of microscopic graphene sheets to macroscopic materials, such as excellent mechanical properties, fast electron mobility, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/02B01J19/12C07C31/04C07C29/15B01J21/18
CPCY02P20/52
Inventor 张亚婷李可可刘国阳蔡江涛周安宁邱介山
Owner XIAN UNIV OF SCI & TECH
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