Air flow regulation system for exhaust stream oxidation catalyst

A dynamic air flow regulation system to enhance the performance of an oxidation catalyst in the exhaust stream of a natural gas fueled, internal combustion engine driven co-generation unit utilizing recycled exhaust gas comprising:

• a. an oxygen sensor in contact with the exhaust stream upstream of the oxidation catalyst for generating signals in response to the oxygen content in the exhaust gas;
• b. an air induction process controller in communication with the oxygen sensor for interpreting the sensor signals and issuing commands in response thereto;
• c. a control valve for regulating air flow into the exhaust stream, upstream of the sensor and in communication with the air induction process controller wherein the process controller responds to the commands to control the air passing through the control valve into an air venturi in communication with the gas stream;
• d. a heat sensor upstream of the oxidation catalyst and downstream of the air venturi for generating signals in response to the temperature of the gas stream;
• e. a heater process controller in communication with the heat sensor for interpreting the sensor signals and issuing commands in response thereto;
• and,
• f. a heater for heating the air flow through the control valve in response the heater process controller commands to regulate the temperatures of the air passing through the control valve into an air venturi in communication with the gas stream such that the performance of the oxidation catalyst is enhanced.