Patent ID: 8377284

Claim:
A method of recycling process gas into an electrochemical process comprising at least one gas diffusion electrode, said method comprising: feeding feed gas into the electrochemical process via a gas jet pump under a pressure which exceeds a process pressure, expanding the feed gas to process pressure in a gas jet pump, and generating a suction pressure which is less than the process pressure, and aspirating feed gas-containing tail gas by means of the suction pressure generated in a gas jet pump and recycling the tail gas into the electrochemical process via at least one control member, wherein the at least one control member is positioned in the tail-gas stream, off-gas stream and/or recycling-gas stream; wherein the feed gas and tail gas are fed into the electrochemical process in 1.01- to 10-fold stoichiometric excess, based on consumption of feed gas in the electrochemical process.