1) Cov pa roj carbon residual yog qhov qhia tsis ncaj ntawm colloidal thiab tsis ruaj khov hauv cov khoom siv roj. Qhov siab dua qhov seem ntawm cov pa roj carbon monoxide, qhov tsis ruaj khov hydrocarbons ntau dua thiab cov tshuaj colloidal hauv cov khoom roj.
2) Lub teeb diesel siv 10% residual carbon raws li qhov taw qhia. Qhov seem carbon nqi ntawm diesel yog ib qho kev ua ntawm nws cov distillation ntau thiab refining degree. Qhov sib dua thiab ua kom zoo dua cov feem ntawm cov diesel, qhov me dua qhov seem carbon nqi. Yog li ntsuas qhov seem ntawm 10% diesel residue yog qhov tseem ceeb rau kev ua kom cov khoom zoo ntawm cov diesel;
3) Lubricating roj ua los ntawm cov roj hnyav uas muaj cov khoom siv colloidal ntau muaj cov pa roj carbon ntau, uas tuaj yeem siv los txiav txim siab qhov ntsuas ntawm cov roj lubricating;
4) Kev ntsuas cov pa roj carbon monoxide nyob rau hauv cov khoom siv roj coking tuaj yeem txiav txim siab ncaj qha rau cov txiaj ntsig coke. Qhov siab dua qhov seem carbon nqi, qhov ntau dua cov coke ntau lawm.