Oxidation mai kara kuzari
A matsayin mai haɓaka ƙarni na farko, Pt da Pd oxidation catalysts ana amfani da su a ƙasashen waje.Duk da haka, irin waɗannan abubuwan haɓakawa suna iya sarrafa hayakin carbon monoxide da hydrocarbons kawai, don haka ana kiran su/hanyoyi biyu masu ƙara kuzari.Tun daga shekarun 1980, gwamnatin tarayya ta Amurka ta ɗaga ƙa'idar NOX na fitar da motoci, ta yadda irin waɗannan abubuwan ba za su iya cika ma'auni ba kuma a hankali a kawar da su.
Hanyoyi uku masu kara kuzari
Mataki na I
Kamar yadda aka inganta ma'auni na NOX, Pt da Rh catalysts sun fito kamar yadda lokutan ke buƙata.Wannan mai kara kuzari na iya tsarkake carbon monoxide, hydrocarbons da oxides na nitrogen a lokaci guda, don haka ana kiransa sifili mai kara kuzari ta hanyoyi uku Wannan shine bincike na/hanyoyi uku 0 mai kara kuzari.Duk da haka, wannan mai kara kuzari yana buƙatar adadi mai yawa na karafa masu daraja irin su Pt da Rh;Yana da tsada kuma yana da saurin kamuwa da gubar dalma.Saboda haka, bai dace da motocin da ke amfani da man fetur na gubar ba.
Mataki na II:
Pt da Rh an maye gurbinsu da wani bangare da Pd don rage farashin mai kara kuzari.Shirya/hanyoyi uku 0 mai haɓakawa tare da Pt, Rh, Pd azaman babban jiki.Yana iya tsarkake CO, HC da NO a lokaci guda.Amfaninsa shine babban aiki, sakamako mai kyau na tsarkakewa, tsawon rai, amma farashi mai yawa.Ana amfani da shi sosai a ƙasashen waje;
Mataki na uku:
All palladium mai kara kuzari.Samfurin mai amfani yana da fa'idodin tsarkakewa na lokaci guda na CO, HC da NOX, ƙarancin farashi, kwanciyar hankali mai zafi mai zafi da halayen kashe saurin haske.
Sai kawai ta hanyar sarrafa daidaitaccen rabon iskar mai a cikin kunkuntar taga (gaba ɗaya 14.7 ± 0.25) kusa da ƙayyadaddun iskar man iskar mai za a iya tsarkake gurɓatattun abubuwa guda uku a lokaci guda.
Lokacin aikawa: Nuwamba 18-2022