High-temperature low-hydration ion exchange membrane electrochemical cell

An electrochemical electrolyzer comprising

• (a) an anode comprising a water feed chamber with an inlet for receiving feed water and an outlet for discharging unreacted water and product oxygen gas;
• (b) a cathode comprising a hydrogen product chamber with an outlet for discharging product hydrogen gas;
• and
• (c) a high-temperature low-hydration membrane sandwiched between the anode and the cathode;
• the anode and the cathode being electrically couplable to an electric current source for powering the electrolyzer to produce hydrogen gas in a reduction reaction at the cathode, and oxygen gas in an oxidation reaction at the anode.

An electrochemical pump comprising

• (a) an anode comprising a hydrogen feed chamber with an inlet for receiving hydrogen-containing feed gas;
• (b) a cathode comprising a hydrogen product chamber with an outlet for discharging product hydrogen gas;
• (c) a high-temperature low-hydration membrane sandwiched between the electrodes;
• the anode and cathode being electrically couplable to an electric current source for powering the electrochemical pump to produce the product hydrogen gas in a reduction reaction at the cathode.

An electrochemical filter comprising

• (a) an anode comprising a hydrogen feed chamber with an inlet for receiving an unfiltered feed gas comprising hydrogen and contaminants, and an outlet downstream of the inlet and for discharging the contaminants;
• (b) a cathode comprising a hydrogen product chamber with an outlet for discharging a hydrogen product gas;
• (c) a high-temperature low-hydration membrane sandwiched between the electrodes;
• and
• the anode and cathode being electrically couplable to an electric current source for powering the electrochemical filter to produce the hydrogen product gas in a reduction reaction at the cathode, thereby separating the contaminants from the hydrogen in the feed gas.