()ProductionaromaticsbycatalyticreformingBasic chemical reactions of catalytic reformingMain reactionsDehydrogenation of cycloalkanesIsomerization and dehydrogenation offive-memberedringsDehydrocyclization of alkanesIsomerization hydrocracking ofalkanesSide reactionsPolymerization of alkenesHydrocracking
(1) Production aromatics by catalytic reforming Basic chemical reactions of catalytic reforming ⚫ Main reactions ➢ Dehydrogenation of cycloalkanes ➢ Isomerization and dehydrogenation of five-membered rings ➢ Dehydrocyclization of alkanes ➢ Isomerization hydrocracking of alkanes ⚫ Side reactions Polymerization of alkenes Hydrocracking
0C-0--0IscmerizationC-C-C-C-C-C-0izatiorAromatizationCombinationReactions occurring during catalytic reforming
Reactions occurring during catalytic reforming
Rawmaterials ofcatalyticreformingNaphthafractionsIn general, naphtha containing more cycloalkanes is selected asraw materials of catalytic reformingThe distillation range of naphthais selected according toproduce objectivearomatics.Developing newrawmaterialsHydrocracking naphthaExtractive residual oil of cracking gasoline裂解汽油萃余油
Raw materials of catalytic reforming ⚫ Naphtha fractions In general, naphtha containing more cycloalkanes is selected as raw materials of catalytic reforming. The distillation range of naphtha is selected according to produce objective aromatics. ⚫ Developing new raw materials Hydrocracking naphtha Extractive residual oil of cracking gasoline 裂解汽油萃余油
Pretreatment of catalytic reformingrawmaterialsHydrogenation pretreatmentRemoving trace harmful impuritiesSulfur w% < 0.5~2 × 10-6Arsenic w% < 2 ×10-9Heavy Metal w% < 2 ×10-8
Pretreatment of catalytic reforming raw materials ⚫ Hydrogenation pretreatment Removing trace harmful impurities Sulfur w% < 0.5~2 ×10-6 Arsenic w% < 2 ×10-9 Heavy Metal w% < 2 ×10-8
Catalysts of catalytic reformingOne or many precious metal is dispersed in porouscarriers, and main metal is platinumBimetalliccatalyst(platinum rhenium, platinum stannum,platinum iridium)-Al,O3Carriers:
Catalysts of catalytic reforming ⚫ One or many precious metal is dispersed in porous carriers, and main metal is platinum. ⚫ Bimetallic catalyst (platinum rhenium, platinum stannum, platinum iridium) ⚫ Carriers：γ-Al2O3