HOUSTON, July 12 - Exxon Mobil Corp (XOM.N) reported a malfunction in a gasoline-producing fluidic catalytic cracking unit at its 344,500 barrel per day (bpd) Beaumont, Texas, refinery on Saturday, according to a notice filed with state pollution regulators.

The FCC's wet gas compressor was shut Saturday night after a part on the unit broke releasing hydrocarbons into the air, according to the notice filed with the Texas Commission on Environmental Quality