摘要 : The sieve plate electrochemical reactor is a unit for enabling electrochemical reaction of gaseous species in the liquid phase. The reaction can occur either directly at the surface of the electrodes or indirectly with electrochem... 展开 The sieve plate electrochemical reactor is a unit for enabling electrochemical reaction of gaseous species in the liquid phase. The reaction can occur either directly at the surface of the electrodes or indirectly with electrochemical mediators generated in situ. A sieve plate absorber is used for the gas-to-liquid mass transfer and, on appropriate stages, stacks of electrodes are supported on the sieve plates and are electrically connected in a bipolar configuration. Data are reported for the indirect oxidation of ethene using bromine formed by the anodic oxidation of bromide solutions on graphite electrodes. The effect of ethene partial pressure and current density on the current efficiency, selectivity and energy consumption of ethene oxide is reported. The effect of using a co-solvent (t-butyl alcohol), to increase ethene solubility, on the performance of the reactor is also reported. The reactor is capable of achieving conversions of ethene in the gas phase greater than 80%, although current efficiencies are relatively low, approximately 50%. A mathematical model for the unit is developed which accommodates interphase mass transport of reactants, and product species, between gas and liquid. 收起