Aniline-synthesizing and electric energy-generating process utilizing proton exchange film fuel cell

A proton exchange membrane and fuel cell technology, applied in the electrolysis process, power generation process, etc., can solve the problems of harsh reaction conditions and serious energy consumption, and achieve the effects of high utilization value, simple production process and low pollution

Inactive Publication Date: 2003-03-19
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies in the prior art, break through the traditional idea of ​​nitrobenzene hydrogenation reduction and fuel cell reactor technology, and propose a method for realizing aniline synthesis and electric energy symbiosis using a proton exchange membrane fuel cell. The electrochemical synthesis of aniline from nitrobenzene in the fuel cell is symbiotic with electric energy, which solves the problems of harsh reaction conditions and serious energy consumption in the existing synthetic aniline technology, and provides a new reaction site for the hydrogenation reaction. Expand new fields of application

Method used

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  • Aniline-synthesizing and electric energy-generating process utilizing proton exchange film fuel cell
  • Aniline-synthesizing and electric energy-generating process utilizing proton exchange film fuel cell

Examples

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example 1

[0019] Example 1: Preparation of platinum loading 0.5mg / cm 2 The membrane electrode, and the membrane electrode into the battery. Prepare 30ml of 0.25mol / L nitrophenylethanol solution, add 1g of electrolyte, connect the cathode and anode pipelines, and control the battery temperature at 30°C. After the initial polarization, hydrogen gas was introduced, and the flow rate of hydrogen gas was controlled at 20ml / min. The peristaltic pump was turned on, and the flow rate of catholyte was controlled at 1ml / min. The measured open circuit voltage is 0.25V, 0.58mmol of aniline can be obtained in 2 hours, the conversion rate is 19%, and the maximum power density is 3.1mW / cm 2 , the current density at this time is 22mA / cm 2 .

example 2

[0020] Example 2: Preparation of platinum loading 2mg / cm 2 The membrane electrode, and the membrane electrode into the battery. Prepare 30ml of 2mol / L nitrophenylethanol solution without adding electrolyte, connect the cathode and anode pipelines, and control the battery temperature at 70°C. After the initial polarization, hydrogen gas was introduced, and the flow rate of hydrogen gas was controlled at 80ml / min. The peristaltic pump was turned on, and the flow rate of catholyte was controlled at 6ml / min. The measured open circuit voltage is 0.28V, 0.64mmol of aniline can be obtained in 2 hours, the conversion rate is 21%, and the maximum power density is 3.6mW / cm 2 , the current density at this time is 27mA / cm 2 .

example 3

[0021] Example 3: Adopt a typical proton exchange membrane fuel cell porous gas diffusion three-in-one membrane electrode, and install the membrane electrode into the battery. Prepare 30ml of 0.5mol / L nitrophenylethanol solution, add 1g of electrolyte, connect the cathode and anode pipelines, and control the battery temperature at 50°C. After the initial polarization, feed hydrogen, control the flow rate of hydrogen at 10ml / min, turn on the peristaltic pump, control the flow rate of catholyte to 3ml / min, measure the open circuit voltage 0.31V, obtain aniline 0.78mmol in 2 hours, the conversion rate is 29%, the maximum The power density is 4mW / cm 2 , the current density at this time is 30mA / cm 2 .

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Abstract

The proton exchange film fuel cell is connected to the test system while the temperature of the cell is controlled, cathode reactant is pumped into the cathode chamber after the cathode chamber is pretreated with nitrogen, and the circuit is turned on after hydrogen is led to the anode, so that the residual oxygen in the cathode chamber is reacted fully. During the reaction, the hydrogen flow rate to the anode chamber and the flow rate of ethanol solution of nitrobenzene pumped into the cathode chamber are controlled, the reaction current is controlled via the variable resistor, and thus aniline product is produced in case of no load. The proton exchange film fuel cell has porous three-in-one film electrodes. The present invention makes it possible to produce electric energy while synthesizing product and has important significance in producing small amount of high-quality chemical product.

Description

Technical field: [0001] The invention relates to a method for realizing aniline synthesis and electric energy symbiosis by using a proton exchange membrane fuel cell, which uses the proton exchange membrane fuel cell as a reactor to perform electrochemical hydrogenation reaction of nitrobenzene within the working range of the proton exchange membrane fuel cell , to synthesize aniline and generate electricity. 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 of fields. Using proton...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B5/00
CPCY02E60/566Y02E60/50
Inventor 马紫峰袁晓姿
Owner SHANGHAI JIAO TONG UNIV
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