Patent ID: 7572320

Claim:
A method for removing high concentration ozone and TEOS from a waste gas stream, comprising the following steps: (1) providing an apparatus, comprising a tank having an input port, an exhaust port and a packing, wherein the input port is on a side of the tank and close to a bottom face of the tank, the exhaust port is on a top face of the tank, and the packing is located in the tank; a liquid injection element for injecting a reductant solution through the packing; and a storage vessel connecting to the liquid injection element; (2) transporting a gas into the tank through the input port to contact with the reductant solution; and (3) exhausting the gas via the exhaust port; wherein the reductant is phosphate or nitrite, and the concentration of the reductant solution ranges from 0.0001 to 3% by weight.