CDTECH FCC Gasoline HDS.pdf
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1、Ultra Low Sulfur Gasoline via Commercially Proven Catalytic Distillation Gasoline Desulfurization Requirements - Pool sulfur specification - Europe European Union 50 ppm max - 2005 10 ppm max - available 2005 - standard 2008 - US, Canada 30 ppm avg - 2002 to 2008 - Future 15 -10 -5 ppm? - 2005+ - Mx
2、ico 300 / 500 ppm max (150 avg) - 2004 80 ppm max (30 avg) - 2006 / 2008 Modern Refinery Requirements Maximize refinery margin Minimize refinery downtime/shutdown costs Minimum FCC turnaround cycle 5 years Avoid any FCC downstream shutdowns - Choose FCC gasoline HDS technology wisely FCC Gasoline Fe
3、ed Composition 0 2000 4000 6000 8000 10000 12000 50100150200250 Temperature, C Sulfur, ppm 0 10 20 30 40 Olefins, % SulfurOlefins FCC C5+ GASOLINE Optimized FCC Gasoline HDS LCN Mild HDSMild HDS MediumMedium HDSHDS SevereSevere HDSHDS MCN HCN MCN/HCN Conventional FCC LCN Treating Fractionate LCN fro
4、m FCC Gasoline Selective Hydrogenation TREATED LCN HYDROGEN Hydrogen Compression FCC C5+ GASOLINE MCN/HCN FRESH CAUSTIC Mercaptan Removal SPENT CAUSTIC Caustic wash for mercaptan removal - 90% effective Selective hydrogenation of dienes for alky/ethers Compression of makeup hydrogen LCN Vent Gas CW
5、Steam Hydrogen Bottoms Treated Distillate Hydrocarbon Feed CDHydroProcess Hydrogenation/Distillation Add Hydrogen Feed Replace trays with structured distillation packing containing catalyst Vent excess Hydrogen Catalyst Section Drawing LCN LCN RSH Dienes Hydrogen Wire Mesh Catalyst Reflux Sulfides C
6、atalytic Distillation RSH + Diene Sulfide Selective Hydrogenation FCC C5+ GASOLINE FRESH CAUSTIC TREATED LCN HYDROGEN MCN/HCN Mercaptan Removal Hydrogen Compression SPENT CAUSTIC Improved LCN Treating Replace upper section with CDHydro (5-7 barg) HYDROGEN Eliminate fresh caustic and caustic wash - 9
7、9.5% HDS Heavy sulfur to bottom Off GasCW Hydrogen Desulfurized FCC C7+ Gasoline CDHDS FCC C7+ Gasoline Light olefins to top Min octane loss Low H2 consumption Low sulfur bottoms product good for gasoline or diesel No yield loss due to cracking No makeup compressor No mid-cycle shutdown for catalyst
8、 regen No feed storage required MCN HCN CD Optimized FCC Gasoline HDS Hydrogen CDHDS Hydrogen FCC C5+ GASOLINE LCN MCN/HCN CDHydro ShellMartinez, CaliforniaDepentanizer LCN CDHydroSeptember-95 PennzoilShrevesport, LouisianaDepentanizer LCN CDHydroApril-97 ShellPort Arthur, Texas Dehexanizer HCN CDHD
9、SMay-00 Irving OilSt. John, New Brunswick, Can. Dehexanizer LCN CDHydroNovember-00 Irving OilSt. John, New Brunswick, Can. Splitter HCN CDHDSNovember-00 Veba OelGelsenkirchen, Germany Dehexanizer LCN CDHydroOctober-00 ChevronTexacoPembroke, UK Dehexanizer LCN CDHydroJanuary-00 ChevronTexacoPembroke,
10、 UK Splitter HCN CDHDSJanuary-00 PetroChinaNanchong, China Dehexanizer LCN CDHydroJanuary-00 Motiva Port Arthur, Texas Dehexanizer LCN CDHydroFebruary-03 Motiva Port Arthur, Texas Splitter HCN CDHDSFebruary-03 HellenicAspropyrgos, GreeceDehexanizer LCN CDHydroSeptember-03 MotivaConvent, LouisianaDeh
11、exanizer LCN CDHydroOctober-03 MotivaConvent, LouisianaSplitter HCN CDHDSOctober-03 ValeroTexas City, TexasDehexanizer LCN CDHydroNovember-03 ValeroTexas City, TexasSplitter HCN CDHDSNovember-03 EquilonPuget Sound, WADehexanizer LCN CDHydroNovember-03 EquilonPuget Sound, WASplitter HCN CDHDSNovember
12、-03 MotivaNorco, LouisianaDehexanizer LCN CDHydroJanuary-04 MotivaNorco, LouisianaSplitter HCN CDHDSJanuary-04 CDTECH FCC Gasoline Desulfurization Operating Experience 21 Units with greater than 45 years total operation Why does CDTECH have less octane loss for a given olefin reduction? CDHDS Select
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