Method for preparing 1,3-butadiene through electro-catalytic acetylene coupling

A technology of butadiene and electrocatalysis, applied in electrodes, electrolysis components, electrolysis process, etc., can solve the problems of poor solubility of acetylene, low current density, electrocatalytic hydrogen evolution side reaction, and no commercial application value

Active Publication Date: 2021-02-09
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, limited by the extremely poor solubility of acetylene in the electrolyte, low current density, and side reactions of electrocatalytic hydrogen evolution, the conversion rate of acetylene and the sel...

Method used

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  • Method for preparing 1,3-butadiene through electro-catalytic acetylene coupling
  • Method for preparing 1,3-butadiene through electro-catalytic acetylene coupling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) The gas diffusion electrode made of Fe nanoparticles is used as the cathode of the electrolytic cell; the gas diffusion electrode made of iridium oxide catalyst is used as the anode of the electrolytic cell; both the catholyte and the anolyte are 0.1M KHCO 3 solutions, separated by anion exchange membranes, and as figure 1 The schematic diagram of the apparatus shown assembles the various components.

[0054] (2) Use a gas mass flowmeter to control the flow rate of the acetylene-ethylene mixed reaction gas to 50 sccm.

[0055] (3) A peristaltic pump is used to control the flow rate of catholyte and anolyte to 50 sccm.

[0056] (4) The catalytic activity of Fe nanoparticles was characterized by potentiostatic method.

[0057] The catalyst composition and specific evaluation results are shown in Table 1.

Embodiment 2

[0059] (1) The gas diffusion electrode made of Co nanoparticles was used as the cathode of the electrolytic cell; the gas diffusion electrode made of iridium oxide catalyst was used as the anode of the electrolytic cell; both the catholyte and the anolyte were 0.1M KHCO 3 solutions, separated by anion exchange membranes, and as figure 1 The schematic diagram of the apparatus shown assembles the various components.

[0060] (2) Use a gas mass flowmeter to control the flow rate of the acetylene-ethylene mixed reaction gas to 50 sccm.

[0061] (3) A peristaltic pump is used to control the flow rate of catholyte and anolyte to 50 sccm.

[0062] (4) The catalytic activity of Co nanoparticles was characterized by potentiostatic method.

[0063] The catalyst composition and specific evaluation results are shown in Table 1.

Embodiment 3

[0065] (1) The gas diffusion electrode made of Ni nanoparticles is used as the cathode of the electrolytic cell; the gas diffusion electrode made of iridium oxide catalyst is used as the anode of the electrolytic cell; both the catholyte and the anolyte are 0.1M KHCO 3 solutions, separated by anion exchange membranes, and as figure 1 The schematic diagram of the apparatus shown assembles the various components.

[0066] (2) Use a gas mass flowmeter to control the flow rate of the acetylene-ethylene mixed reaction gas to 50 sccm.

[0067] (3) A peristaltic pump is used to control the flow rate of catholyte and anolyte to 50 sccm.

[0068] (4) The catalytic activity of Ni nanoparticles was characterized by potentiostatic method.

[0069] The catalyst composition and specific evaluation results are shown in Table 1.

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Abstract

The invention relates to a method for preparing 1,3-butadiene by electrocatalytic acetylene coupling, and a gas diffusion electrode electrolytic tank is adopted. A gas diffusion electrode is adopted,a catalyst is sprayed on a gas diffusion layer substrate (including conductive carbon paper and metal) to prepare the gas diffusion electrode, and a cathode and an anode are isolated by an ion exchange membrane. A three-electrode or two-electrode system constant-voltage method is adopted to carry out electrochemical performance test, wherein the reaction gas is high-purity acetylene. Experimentalresults show that the Faraday efficiency of the target product 1,3-butadiene reaches 70% or more by regulating and controlling a proper voltage range, and byproducts ethylene and hydrogen are easy toseparate from 1,3-butadiene. Compared with a traditional thermocatalysis technology, the method has the advantages that the production cost of 1,3-butadiene can be effectively reduced, the huge pressure brought by the coal-rich lean oil energy resource structure in China is relieved, the technical requirements of green chemical engineering are met, and the method has great strategic significance.

Description

technical field [0001] The invention belongs to a synthesis method of 1,3-butadiene, and relates to a method for preparing 1,3-butadiene by electrocatalytic acetylene coupling. The use of gas diffusion electrodes improves the reaction current density and the Faradaic efficiency of the target product, which has great practical application prospects. Background technique [0002] 1,3-Butadiene is an important basic organic raw material in petrochemical industry and has a wide range of industrial applications. Because it is a conjugated diene, it can undergo substitution, addition, cyclization, polymerization, and copolymerization with various compounds, and can be used to synthesize various organic chemical products. Among them, the synthetic rubber industry is the most important field of butadiene application, and its consumption accounts for 80% of the total global butadiene consumption. Synthesis of diene rubber, etc. Butadiene is also widely used in synthetic resins, su...

Claims

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Application Information

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IPC IPC(8): C25B3/03C25B3/25C25B11/032C25B9/19
Inventor 张健卜军
Owner NORTHWESTERN POLYTECHNICAL UNIV
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