Electrochemistry hydrogen pump dual reactor for organic matter dehydrogenation and hydrogenation coupling

An electrochemical and reactor technology, applied in the field of electrochemical engineering, can solve the problems of high temperature for reaction and difficult separation of products, and achieve the effect of simplifying the reaction process, simplifying the separation process, and saving equipment and transportation costs

Active Publication Date: 2015-12-30
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

TopCatal.58(2015)149 proposed a thermal decoupling reactor on this basis. Under the condition of reaction temperature of 250°C, butanone and nitrobenzene were directly mixed to realize the dehydrogenation of butanone to supply nitrobenzene for hydrogenation The dual-reaction coupling improves hydrogenation efficiency and reaction heat utilization, but the problems of product separation and reaction requiring high temperature are still unresolved

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  • Electrochemistry hydrogen pump dual reactor for organic matter dehydrogenation and hydrogenation coupling
  • Electrochemistry hydrogen pump dual reactor for organic matter dehydrogenation and hydrogenation coupling
  • Electrochemistry hydrogen pump dual reactor for organic matter dehydrogenation and hydrogenation coupling

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Embodiment 1

[0022] The loading capacity of the anode is 4.0mgcm -2 PtRu gas diffusion electrode, the loading capacity of the cathode is 0.5mgcm -2 Pt gas diffusion electrode. The treated Nafion117 membrane and cathode and anode gas diffusion electrodes were placed in an oil press, and a gas diffusion three-in-one membrane electrode was made by hot pressing at 140°C and 5MPa for 90s. Put the assembled gas-diffusion three-in-one membrane electrode in the electrochemical hydrogen pump reactor, and raise the temperature of the reactor to 80°C. Pass 1mol / L isopropanol aqueous solution into the anode at a flow rate of 10mL / min; pass 0.1mol / L phenol aqueous solution into the cathode at a flow rate of 10ml / min, and run at a constant current of 100mA for 3h. The anode voltage is controlled at 0.2V, and the anode dehydrogenation rate is 61.6mmolcm -1 the s -1 , and the current efficiency is 62.8%. Take the cathode hydrogenation product and add the internal standard to carry out the gas chromat...

Embodiment 2

[0024] The loading capacity of the anode is 0.5mgcm -2 Pt gas diffusion electrode, the loading capacity of the cathode is 0.5mgcm -2 Pt gas diffusion electrode. The treated Nafion117 membrane and cathode and anode gas diffusion electrodes were placed in an oil press, and a gas diffusion three-in-one membrane electrode was made by hot pressing at 140°C and 3MPa for 60s. Place the assembled gas-diffusion three-in-one membrane electrode in the electrochemical hydrogen pump reactor, and raise the temperature of the reactor to 60°C. Pass 2mol / L isopropanol aqueous solution into the anode at a flow rate of 10ml / min; pass 0.1mol / L phenol aqueous solution into the cathode at a flow rate of 10mL / min, run at a constant current of 100mA for 1 hour, and control the anode voltage at 0.8V , the anode dehydrogenation rate is 60.7mmolcm -1 the s -1 , the current efficiency is 62.0%, and the cathode hydrogenation product is added to the internal standard substance for gas chromatography te...

Embodiment 3

[0026] The loading capacity of the anode is 4.0mgcm -2 PtRu gas diffusion electrode, the loading capacity of the cathode is 0.5mgcm -2 Pd gas diffusion electrode. The treated Nafion117 membrane and cathode and anode gas diffusion electrodes were placed in an oil press, and a gas diffusion three-in-one membrane electrode was made by hot pressing at 140°C and 5MPa for 90s. Put the assembled gas-diffusion three-in-one membrane electrode in the electrochemical hydrogen pump reactor, and raise the temperature of the reactor to 80°C. Pass 1mol / L isopropanol aqueous solution into the anode at a flow rate of 10mL / min; pass 0.1mol / L phenol aqueous solution into the cathode at a flow rate of 10mL / min, and run at a constant current of 100mA for 1h. The anode voltage is 0.6V, and the anode dehydrogenation rate is 61.6mmolcm -1 the s -1 , and the current efficiency is 62.8%. The cathode hydrogenation product was added with an internal standard for gas chromatographic testing, and the ...

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Abstract

An electrochemistry hydrogen pump dual reactor for organic matter dehydrogenation and hydrogenation coupling is characterized in that the low electrochemistry window of organic matter is used to complete an anode dehydrogenation reaction under low voltage, the generated catalyst in-situ hydrogen is supplied to and used by cathode hydrogenation, the dehydrogenation and hydrogenation reactions occur in the same reactor at the same time, and the high-temperature and high-pressure operations of a conventional heterogeneous reactor are avoided; meanwhile, a proton-exchange membrane is used to effectively prevent the mixing of cathode and anode reactants, and mutual influence of the cathode and anode reactions is avoided. The electrochemistry hydrogen pump dual reactor has the advantages that normal-pressure hydrogenation is realized, direct hydrogen supply is used, the reaction flow is simplified, and cost is saved; the organic matter with the low electrochemistry window is used to avoid the high-temperature reaction and the high-voltage operation.

Description

technical field [0001] The invention belongs to the technical field of electrochemical engineering, and relates to an electrochemical hydrogen pump double reactor coupled with organic matter dehydrogenation and hydrogenation. Background technique [0002] The electrochemical hydrogen pump reactor is a new type of membrane reactor. Its structure is the same as that of the proton exchange membrane fuel cell. Under the promotion of external electric energy, the electrochemical reaction can be realized, which can be regarded as the reverse process of the fuel cell. Its main advantage is that it can generate catalysts at the cathode to absorb hydrogen atoms in situ, and convert the processes of hydrogen dissolution, mass transfer, dissociation and adsorption in the existing heterogeneous hydrogenation process into the process of in situ hydrogen adsorption generated by the cathode catalytic layer, Directly participate in the liquid phase hydrogenation reaction under normal pressu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/10C25B13/08C25B11/02
CPCY02E60/36
Inventor 贺高红吴雪梅黄诗琪陈伟王涛马琳刘释水
Owner DALIAN UNIV OF TECH
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