Heated graphite scrubber to reduce interferences in ozone monitors

An ozone scrubber for reducing interferences from water vapor, mercury and UV-absorbing compounds in the measurement of ozone in a sample gas, the ozone scrubber comprising:

• a chamber adapted to allow the sample gas to flow through the chamber and come into contact with material packed inside the chamber before exiting the chamber;
• the material packed inside the chamber being at least a majority graphite by composition;
• a heater adapted to maintain the material packed inside the chamber at a temperature when the ozone scrubber is functioning;
• wherein the temperature is maintained in the range of 70−110° C.;
• wherein more than 50% of ozone in the sample gas is scrubbed by the material packed inside the chamber when the ozone scrubber is functioning;
• wherein at least 50% of water vapor, mercury, p-xylene or phenol in the sample gas passes through the chamber when the ozone scrubber is functioning.

An ozone scrubber for reducing interferences by water vapor, mercury and UV-absorbing compounds in the measurement of ozone in a sample gas, the ozone scrubber comprising:

• a chamber adapted to allow the sample gas to flow through the chamber and come into contact with one or more interior surfaces of the chamber before exiting the chamber;
• at least a majority of the one or more interior surfaces of the chamber being at least a majority graphite by composition;
• the chamber housed within a heating block;
• the heating block in thermal communication with a heater;
• the heater adapted to maintain the one or more interior surfaces of the chamber at a temperature when the ozone scrubber is functioning;
• wherein the temperature is maintained in the range of 70−110° C.;
• wherein more than 50% of ozone in the sample gas is scrubbed by the one or more interior surfaces of the chamber when the ozone scrubber is functioning;
• wherein at least 50% of water vapor, mercury, p-xylene or phenol in the sample gas passes through the chamber when the ozone scrubber is functioning.