To provide a gas purification apparatus, a gas purification method, and a discharge reactant used for the gas purification apparatus, for effectively removing, at ordinary temperature and without heating harmful matter, the harmful matter from the gas to be purified containing harmful matter such as particulate matter and nitrogen oxides and thereby to purify the gas to be purified.
In the gas purification apparatus 1, a discharge reaction part 4 is disposed to a gas flow passage 3 into which the gas X to be purified flows, filter structure 5 having particulate matter trapping function disposed in the discharge reaction part 4 so that the gas X can pass through the filter structure, and an electric current source 7 for generating electric discharge is connected to the discharge reaction part 4. The electric current source 7 forms an electric field in the discharge reaction part 4 to generate discharge plasma. The particulate matter contained in the gas X is trapped in the filter structure 5 by electric precipitation effect according to the formation of the electric field, in addition to the particulate matter trapping function of the filter structure 5. Further, the trapped particulate matter is subjected to combustion treatment by action of the discharge plasma and thereby to regenerate the particulate matter trapping function of the filter structure 5.
ARAKI KUNIYUKI
HIDA YOSHIO
Shunguchi Sekiguchi