Method for electrochemical hydrogenation and electric energy symbiosis of water-soluble unsaturated alcohol

An alcohol electrochemical and unsaturated technology, which is applied in the field of water-soluble unsaturated alcohol electrochemical hydrogenation and electric energy symbiosis, can solve the problems of harsh reaction conditions and serious energy consumption, and achieve simple production process, low energy consumption and low pollution low effect

Inactive Publication Date: 2004-11-10
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to address the deficiencies in the prior art, to provide a water-soluble unsaturated alcohol electrochemical hydrogenation and electric energy symbiosis method, to solve the problems of harsh reaction conditions and serious energy consumption in the existing synthesis method technology, and in the synthesis reaction can generate a small amount of electricity at the same time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Using a typical porous gas diffusion three-in-one membrane electrode, the catalyst is 20% Pt / C (JohnsonMatthey), and the Pt loading is 0.35-0.5mg / cm 2 , the solid polymer film was Nafion 117 (Dupont, Fayetteville, PA). After pretreatment, the Nafion membrane and the electrode are cold-pressed and then hot-pressed to form a three-in-one membrane electrode (MEA). Load the proton exchange membrane fuel cell and connect the battery to the test system. Configure 100ml of 2mol / L allyl alcohol aqueous solution, and connect the cathode and anode pipelines. Control the battery temperature at 20°C. After the initial polarization, hydrogen was introduced, the hydrogen pressure was controlled at 1.5 bar, the peristaltic pump was turned on, and the catholyte flow rate was controlled to be 3 ml / min. Response at 10mA / cm 2 for 3 hours.

[0021] The measured open circuit voltage is 0.220V, and the current density is 10mA / cm 2 When the voltage is 0.091V, the current density is 20mA...

Embodiment 2

[0023] Using a typical porous gas diffusion three-in-one membrane electrode, the Pt loading is 0.35-0.5mg / cm 2 , load the proton exchange membrane fuel cell, and connect the battery to the test system. Configure 100ml of 1mol / L 2-butene-1,4-diol aqueous solution, and connect the cathode and anode pipelines. Control the battery temperature at 50°C. After the initial polarization, hydrogen was introduced, the hydrogen pressure was controlled at 1.5 bar, the peristaltic pump was turned on, and the catholyte flow rate was controlled to be 12 ml / min. React at 6mA / cm 2 for 6 hours.

[0024] The measured open circuit voltage is 0.198V, and the current density is 10mA / cm 2 When the voltage is 0.084V, the current density is 20mA / cm 2 , the voltage is 0.040V. At a current density of 6mA / cm 2 , the amount of the product butanediol measured in 6 hours of reaction was 1.4 mmol, the conversion rate was 1.4%, and the current efficiency was about 54%.

Embodiment 3

[0026] Using a typical porous gas diffusion three-in-one membrane electrode, the Pt loading is 0.35-0.5mg / cm 2 , load the proton exchange membrane fuel cell, and connect the battery to the test system. Prepare 100ml of 0.5mol / L 2-butyne-1,4-diol aqueous solution, and connect the cathode and anode lines. Control the battery temperature at 80°C. After the initial polarization, hydrogen was introduced, the pressure of hydrogen was controlled at 1.5 bar, the peristaltic pump was turned on, and the flow rate of catholyte was controlled to be 24 ml / min. React at 6mA / cm 2 for 8 hours.

[0027] The measured open circuit voltage is 0.168V, and the current density is 10mA / cm 2 When the voltage is 0.058, the current density is 20mA / cm 2 , the voltage is 0.036V. At a current density of 6mA / cm 2 , the amount of the product propionic acid measured after reacting for 8 hours was 1.5 mmol, the conversion rate was 1.5%, and the current efficiency was about 44%.

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Abstract

The invention is a water soluble unsaturated alcohol electrochemical hydrogenation and electric energy symbiosis method, utilizing proton exchange film fuel cell to make water soluble unsaturated alcohol electrochemical hydrogenation and electric energy symbiosis, inserting the cell in a testing system and controlling the temperature of the cell, using nitrogen gas to pretreat the cathode chamber before cathode reactant pumped in, and then making initial polarization on the cell, that is, after charging H2 in the anode, turning on circuit to make residual O2 fully react in the cathode chamber; at the time of reaction, controlling H2 and alcohol water fluxes, respectively, and by adjusting variable resistor, controlling reacting current to obtain different purity saturated alcohols. The cell adopts multiporous gas diffusion three-in-one film electrodes, and it can generate electric energy at the time of synthesizing products and has an important significance in producing a few high-quality chemical products.

Description

Technical field: [0001] The invention relates to a water-soluble unsaturated alcohol electrochemical hydrogenation and electric energy symbiosis method. A proton exchange membrane fuel cell is used as a reactor to perform electrochemical hydrogenation reaction of water-soluble unsaturated alcohol within the working range of the proton exchange membrane fuel cell. Synthesis of saturated alcohols and generation of electrical energy. It belongs to the field of electrochemical engineering and catalytic technology. Background technique: [0002] A fuel cell is an electrochemical reaction device that directly converts chemical energy into electrical energy through an electrode catalytic reaction process. Among them, the proton exchange membrane fuel cell (PEMFC) has shown good application prospects in electric vehicles and small mobile power sources. At present, while promoting the commercialization of PEMFC, people are also considering the application of PEMFC in a wider range o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04089H01M8/1004
CPCY02E60/522Y02E60/50
Inventor 马紫峰袁晓姿
Owner SHANGHAI JIAO TONG UNIV
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