Processes and apparatuses for controlling a temperature of a reactor

A process for controlling a temperature of a reactor, the process comprising:

• passing a feed stream comprising oxygen and hydrogen to a reaction zone comprising a reactor, the reactor containing a catalyst configured to catalyze a reaction between oxygen and hydrogen and configured to produce an effluent stream comprising water;
• passing the effluent stream to a separation zone, the separation zone comprising a plurality of vessels containing an adsorbent configured to adsorb water, the separation zone configured to provide a purified product stream, the purified product stream comprising oxygen or hydrogen;
• and
• passing a recycled stream to the reactor to reduce an exotherm of the reactor, wherein the recycled stream comprises a portion of the effluent stream or a portion of the purified product stream.

An apparatus comprising:

• a reaction zone comprising a reactor, the reactor containing a catalyst configured to catalyze a reaction between oxygen and hydrogen and configured to produce an effluent stream comprising water;
• a separation zone, the separation zone comprising a plurality of vessels containing an adsorbent configured to adsorb water, the separation zone configured to provide a purified product stream, the purified product stream comprising oxygen or hydrogen;
• and
• a line configured to pass a recycled stream to the reactor to reduce an exotherm of the reactor, wherein the recycled stream comprises a portion of the effluent stream or a portion of the purified product stream.