Study On Electrode Solution System For Electrolysis Of Methanol To Methanol

The main methods to make methane directly conversion to methanol includegas-solid phase catalytic oxidation, liquid phase catalytic oxidation, enzymaticoxidation, photo catalytic oxidation, plasma catalytic oxidation and so on. As liquidphase catalytic oxidation has the advantages of relative mild reaction conditions, highconversion and high selectivity, it is considered as a valuable technology in industry.Therefore, it is a long target for scientists to build an adaptive catalyst system,especially which keeps high activity, good selectivity and stability in mild reactionconditions.Based on the previous work of our research group, an electrochemical method toprepare methanol directly from methane，the nano-particles of nickel oxide havingcatalytic activity in methane halogenation was chosen to prepare two kinds ofexfoliated graphite/metal composite electrodes with CuO-AlPO4adhesive andPEG-PVA adhesive separately by template method. Four groups of orthogonalexperiment designs of above two composite electrodes in80%ethanol-NaCl alkalineelectrolyte and [Bmim]Br ionic liquids-ethanol alkaline electrolyte separately wereadopted to research the effect of two composite electrodes on methane yields. Thecomposite electrodes with good catalytic activity, conductivity, stability and theelectrolyte suitable for those electrodes were chosen, especially the compositeelectrodes suitable for80%ethanol-NaCl alkaline electrolyte and [Bmim]Br ionicliquids-ethanol alkaline electrolyte. This subject was divided into two parts.The first part, the nano-particles of nickel oxide having catalytic activity waschosen to prepare different exfoliated graphite/metal composite electrodes withCuO-AlPO4adhesive and PEG-PVA adhesive separately by template method.The second part, Four groups of orthogonal experiment designs of everycomposite electrodes in80%ethanol-NaCl alkaline electrolyte and [Bmim]Br ionicliquids-ethanol alkaline electrolyte separately were adopted to choice the electrodeswith good catalytic activity, conductivity, stability and the electrolyte suitable forthose electrodes or the electrodes suitable for80%ethanol-NaCl alkaline electrolyteand [Bmim]Br ionic liquids-ethanol alkaline electrolyte separately. By comparing the experimental results in the optimum conditions of the fourorthogonal experimental designs, it were found that nickel catalyzer in compositeelectrodes was unfavorable for the production of methanol when these electrodeswere used in80%ethanol-NaCl alkaline electrolyte. But the nickel catalyzer wasgood for the production of methanol when these electrodes were used in [Bmim]Brionic liquids-ethanol alkaline electrolyte. The electrodes prepared with PEG-PVAadhesive were better than the electrodes prepared with CuO-AlPO4adhesive inproduction of methanol. Methanol yields of four electrolysis system under theoptimum conditions were all about40%and reached the industrial condition ofpreparing methanol from methane.