Coating of the ECS primary heat exchanger (PHX) with low temperature catalyst for ozone and/or volatile organic compounds (VOC) and/or carbon monoxide conversion

An environmental control system, comprising:

• a first air management subsystem having:
• a first heat exchanger assembly that includes a first main heat exchanger and a first secondary heat exchanger;
• wherein only one of the first main and first secondary heat exchangers have a catalytic coating;
• wherein the first main and the first secondary heat exchangers receive a first ambient air;
• wherein the first main heat exchanger receives a first non-ambient air;
• wherein the first secondary heat exchanger receives a second non-ambient air;
• a first air cycle machine that produces the first non-ambient air into the first heat exchanger assembly and that produces a first conditioned air to a first enclosed environment;
• a second air management subsystem having:
• a second heat exchanger assembly that includes a second main heat exchanger and a second secondary heat exchanger;
• wherein only one of the second main and second secondary heat exchangers have a catalytic coating;
• wherein the second main and the second secondary heat exchangers receive a second ambient air;
• wherein the second main heat exchanger receives a third non-ambient air;
• wherein the second secondary heat exchanger receives the third non-ambient air;
• a second air cycle machine downstream of the second secondary heat exchanger and that produces a second conditioned air to the second main heat exchanger and further to a second enclosed environment.