He whakakōkī hāora
I te mea ko te whakakōkī reanga tuatahi, ka whakamahia ngā whakakōkī hāora Pt me Pd ki tāwāhi.Heoi ano, ka taea e enei momo whakakorikori anake te whakahaere i nga tukunga o te waro monoxide me te waiwaro, no reira ka kiia ko te rua ara kore whakakorikori.Mai i te tekau tau atu i 1980, kua whakaarahia e te kawanatanga o Amerika te paerewa tukunga NOX mo nga waka, kia kore ai e taea e aua whakakorikori te eke ki te paerewa me te whakakore haere.
E toru ara whakakōkī
Wāhanga I
I te mea kua pai ake te paerewa tukunga o NOX, kua puta nga whakakorikori Pt me Rh i runga i te waa.Ka taea e tenei whakakorikori te pure i te wa kotahi te waro monoxide, te hauwai me te waikura o te hauota, no reira ka kiia ko te toru-ara kore whakakōkī Koinei te rangahau o/toru-ara 0 whakakōkī.Heoi ano, me nui nga konganuku utu nui penei i te Pt me te Rh;He utu nui, he pai ki te paopao arataki.Na reira, kaore e pai mo nga waka e whakamahi ana i te penehīni arahi.
Wāhanga II:
Ko te Pt me te Rh he mea whakakapihia e te Pd hei whakaiti i te utu o te whakakorikori.Whakaritea/toru-ara 0 whakakōkī me te Pt, Rh, Pd hei tinana matua.Ka taea e ia te pure i te CO, HC me te NO i te wa ano.Ko ona painga he mahi nui, he pai te purenga, he roa te ora, engari he utu nui.Kei te whakamahia nuitia ki waho;
Te wahanga tuatoru:
Katoa te palladium catalyst.Ko te tauira whaipainga nga painga o te purenga kotahi o te CO, HC me te NOX, te utu iti, te teitei o te wera o te wera me te tere o te rama.
Ma te whakahaere tika i te owehenga hau-wahie i roto i te matapihi whaiti (te nuinga 14.7 ± 0.25) e tata ana ki te tauwehenga hau-wahie katahi ka purea nga poke e toru i te wa kotahi.
Te wa tuku: Noema-18-2022