Patent ID: 7736608

Claim:
A method for reducing the emissions from combustion gases produced during a combustion process, said method comprising: injecting a hydrocarbon-based reducing agent into the combustion gases to form a combustion gas mixture; extracting a portion of the combustion gases; directing a carrier exhaust gas into a vaporizer chamber, the carrier exhaust gas comprises a portion of the combustion gases to vaporize the reducing agent before the reducing agent is injected into the combustion gases, the carrier exhaust gases having a lower temperature and a higher pressure than a temperature and pressure of the extracted combustion gases; injecting a liquid hydrocarbon-based reducing agent into the vaporizer chamber; vaporizing the liquid reducing agent such that droplets of the vaporized reducing agent mix with the carrier exhaust gas; and introducing the mixture of the vaporized reducing agent and the carrier exhaust gas into the combustion gases to form the combustion gas mixture; and directing the combustion gas mixture including oxides of nitrogen (NO x ) through a selective catalyst reduction (SCR) system including a catalyst bed to remove NO x from the combustion gas mixture and to produce an exhaust gas.