intheHydrogenationUnit1.Theopencarbonbondsaresaturatedbyhydrogenbecauseofhighhydrogenpressure, morethan10millionN/m2. Theliquidproductgoesthroughthedistillationprocess. Anyleft-overinertmaterial, whichisnotseparatedandremovedinthedepolymerizationstep, andtheunconvertedplasticportionarecollectedinthebottomofthedistillationcolumnandremovedasaresidue, hydrogenationbitumen. Thefinalhigh-qualityproducts, ra-gasandsyncrude, areobtainedbyhydrotreatment (hydro hóaUnit2). Thesefinalproductsaresenttoconventionalpetrochemicalprocesses.Themixedplasticwasteisconvertedintothefollowingproducts:80wt.%intoliquidproduct,10wt.%intooff-gas(methano-butane), dư lượng and10wt.%. Theliquidproductisfreeofchlorineandextremelylowinoxygenandnitrogen;85wt.%canbeusedascrackerFeed(AssociationofPlasticsManufacturersinEurope,1997). Therest, dependingonthepropertiesoftheplasticwaste, isethylbenzene, whichisanexcellentgasolinecomponent.Thesolidresidue, whichcouldalsobeblendedwiththecoalforapowerplant, canbeusedtoimprovethepropertiesofcoalforcokeproduction.
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