3、structureinthecompositewasabletobecontrolledjustbyvaryingthenNa/nSi.TheproductswerecharacterizedbyXRD,FTIR,N2adsorption/desorption,SEMandhydrothermaltreatmentmethods.XRDpatternsofthecompositeshowedthepeaksforbothβ-zeoliteandmesoporousmolecularsievewithhexagona.Waste cookingoil by c
4、atalyticcracking of compositemolecularsieves,toexplore thebest compositezeolite catalyst for China'senergy issuesand sustainableeconomicdevelopment ofgreat significanceKeyword:β-zeolite;mesoporousmolecularsieve一前言1.1选题背景,意义随着世界的石油的产量逐渐减少,石化柴油燃烧后所排放的废气是造成城市空气污染的主要原因,生物柴油是石化柴油很好的替代能源