| abstract |
A reaction purifier ( 100 ) using microorganisms which feed on harmful components in exhaust gas is installed in an exhaust passage ( 18, 21, 22, 23, 24 ) of an engine ( 1 ). The microorganisms are mixed with a culture fluid, and the culture fluid is circulated through tubes ( 111 ) in which micro holes ( 111 A) are formed. The diameter of these holes is such as not to allow culture fluid to pass, but to allow exhaust gas to pass. The tubes ( 111 ) are housed in a casing ( 112 ), and harmful components are removed by leading exhaust gas into the casing ( 112 ) to bring into contact with the microorganisms in the culture fluid. By using the reaction purifier ( 100 ) and catalytic converter ( 20 A, 20 B) in conjunction, even better exhaust gas purifying performance is obtained. |