离网风电波动下电催化CO2制甲醇动态响应机制分析OA

The wind energy absorption system,which is based on off-grid fluctuations,is an attractive method of large-scale energy storage through the electrocatalytic reduction of CO2 to methanol.However,potential fluctuations caused by wind power fluctuations can catalyse CO2 to produce different reduction products,thereby reducing Faraday efficiency.Therefore,it is important to study the influence of wide power fluctuations in an off-grid system on an electrocatalytic CO2 reduction system.With current density and Faraday efficiency of methanol as indexes in this work,the effects of temperature,potential,CO2 flow rate and peristaltic pump speed on the efficiency of methanol production from CO2 in electrocatalytic reduction under the conditions of using hydrophobic layering modified Cu-PVDF catalyst were investigated to determine the best operating conditions.Using O2 volume as a bridge connecting potential and power,under optimal conditions of temperature,CO2 flow rate and peristaltic pump speed,the power-methanol Faraday efficiency function curve was fitted.The fluctuation of the O2 volume of the anode product represented the fluctuation of the input power,thus obtaining the dynamic response mechanism of the power-methanol Faraday efficiency.The hydrophobic layer-modified Cu-PVDF catalyst extended the range of wind power tolerance fluctuations to 27.2%～158.7%.