Menene graphitization?
Graphitization wani tsari ne na masana'antu wanda ake canza carbon zuwa graphite. Wannan shine canjin tsarin microstructure wanda ke faruwa a cikin ƙarfe masu ƙarancin ƙarfe ko waɗanda aka fallasa su ga yanayin zafi na digiri 425 zuwa 550 Celsius na dogon lokaci, misali awanni 1,000. Wannan wani nau'in embrittlement ne. Misali, tsarin microstructure na ƙarfe masu ƙarancin ƙarfe na carbon-molybdenum galibi yana ɗauke da pearlite (cakuda ferrite da cementite). Lokacin da aka graphitized kayan, yana sa pearlite ya ruɓe ya zama ferrite kuma graphite ya warwatse ba zato ba tsammani. Wannan yana haifar da embrittlement na ƙarfe da raguwar ƙarfi lokacin da waɗannan ƙwayoyin graphite suka bazu ba zato ba tsammani a cikin matrix. Duk da haka, za mu iya hana graphitization ta hanyar amfani da kayan da ke da juriya mafi girma waɗanda ba su da sauƙin kamuwa da graphitization. Bugu da ƙari, za mu iya canza muhalli ta hanyar, misali, ƙara pH ko rage abun ciki na chloride. Wata hanyar hana graphitization ta ƙunshi amfani da shafi. Kariyar ƙarfe mai kauri ta cathodic.
Menene carbonization?
Carbonization tsari ne na masana'antu wanda ake canza kwayoyin halitta zuwa carbon. Abubuwan da muke la'akari da su a nan sun haɗa da gawarwakin tsirrai da dabbobi. Wannan tsari yana faruwa ne ta hanyar narkewar abubuwa masu lalacewa. Wannan aikin pyrolytic ne kuma ana ɗaukarsa a matsayin tsari mai rikitarwa wanda za a iya lura da halayen sinadarai da yawa a lokaci guda. Misali, dehydrogenation, condensation, transfer hydrogen da isomerization. Tsarin carbonization ya bambanta da tsarin carbonization saboda carbonization tsari ne mai sauri saboda yana amsawa da yawa cikin sauri. Gabaɗaya, adadin zafi da aka yi amfani da shi zai iya sarrafa matakin carbonization da adadin abubuwan da suka rage. Misali, abun da ke cikin carbon na ragowar shine kusan kashi 90% na nauyi a 1200K da kusan kashi 99% na nauyi a kusan 1600K. Gabaɗaya, carbonization wani abu ne na exothermic, wanda za'a iya barin shi ko amfani dashi azaman tushen makamashi ba tare da samar da wani alamar iskar carbon dioxide ba. Koyaya, idan kayan halitta ya fallasa ga canje-canje kwatsam a cikin zafi (kamar a cikin fashewar nukiliya), kayan halitta zai canza carbon da sauri kuma ya zama carbon mai ƙarfi.
Graphitization yayi kama da carbonization
Dukansu muhimman hanyoyin masana'antu ne waɗanda suka haɗa da carbon a matsayin mai amsawa ko samfuri.
Mene ne bambanci tsakanin graphitization da carbonization?
Graphitization da carbonization hanyoyi ne guda biyu na masana'antu. Babban bambanci tsakanin carbonization da graphitization shine carbonization ya ƙunshi canza kwayoyin halitta zuwa carbon, yayin da graphitization ya ƙunshi canza carbon zuwa graphite. Don haka, carbonization canji ne na sinadarai, yayin da graphitization canji ne na ƙananan tsari.
Lokacin Saƙo: Satumba-29-2021