The electrochemical promotion of the CO₂ hydrogenation was investigated, using a monolithic electropromoted reactor (MEPR) loaded with nine, connected in parallel, Ru/YSZ/Au electrochemical cells. The study was carried out at ambient pressure and in the temperature range between 220°C and 370°C, using high reactant flowrates (up to 2500 cm³/min) and reducing conditions (P_CO2/P_H2=1/7). For an intermediate flowrate of 1000 cm³/min, the selectivity to methane (S_CH4) was 100 % for temperatures up to 300°C. Further increase in temperature resulted to a decrease in selectivity to methane with a concomitant increase of the corresponding yield (Y_CH4) due to the higher CO₂ conversion. However, the total performance of the reactor, in terms of methane selectivity and yield, was affected significantly under electropromoted conditions. At the maximum studied temperature of 370°C, the unpromoted values of S_CH4 and Y_CH4 were 84 % and 24 % respectively, while O²⁻ supply to the catalytic surface enhanced theses values to 92 % and 32 % respectively. The qualitative features of electropromotion, i.e. electrophobic behavior for methanation and electrophilic behavior for the RWGS reaction, were in agreement with previous EPOC studies of CO₂ hydrogenation in laboratory scale reactors showing a successful scale up of Electrochemical Promotion of Catalysis (EPOC). In addition, the good performance of the monolithic reactor under severe operating conditions of high flowrates and temperatures is a promising result for further scale-up and for the practical utilization of EPOC.

使用装有9个并联连接的Ru / YSZ / Au电化学电池的整体式电催化反应器（MEPR），研究了CO ₂氢化的电化学促进作用。该研究是在环境压力和220°C至370°C的温度范围内，使用高反应物流量（最高2500 cm ³ / min）和还原条件（P _CO2 / P _H2 = 1/7）下进行的。对于1000 cm ³ / min的中间流速，在最高300°C的温度下，甲烷（S _CH4）的选择性为100％。温度的进一步升高导致对甲烷的选择性降低，相应的收率随之提高（Y _CH4）是由于较高的CO ₂转化率。然而，就甲烷选择性和产率而言，反应器的总性能在电助条件下受到显着影响。在最高研究温度为370°C时，S _CH4和Y _CH4的未促进值分别为84％和24％，而向催化表面供应O ^2-则将这些值分别提高至92％和32％。电促进的定性特征，即甲烷化的疏水行为和RWGS反应的亲电行为与先前的EPOC对CO _2的研究一致实验室规模反应器中的加氢反应显示出电化学催化促进（EPOC）的成功规模化。另外，整体反应器在高流量和高温的苛刻操作条件下的良好性能对于进一步扩大规模和实际使用EPOC是有希望的结果。