1Prime-G+ UpdateQuentin Debuisschert2Prime-G+ Update – 12thEur. FCC Conference - Grace Davison Seminar – Seville - May 2004Agenda•Gasoline Sulfur Control•Prime-G+ Technology Update•Prime-G+ Commercial Update•The Industrial Experience•Axens’ Integrated Offer3Prime-G+ Update – 12thEur. FCC Conference - Grace Davison Seminar – Seville - May 2004Agenda•Gasoline Sulfur Control•Prime-G+ Technology Update•Prime-G+ Commercial Update•The Industrial Experience•Axens’ Integrated Offer4Prime-G+ Update – 12thEur. FCC Conference - Grace Davison Seminar – Seville - May 2004European Gasoline Sulfur Regulations•EU 2000 spec. 150 ppm sulfur•EU 2005 spec. 50 ppm sulfur•U.K., October 2000 Tax incentive for 50 ppm S•Germany, End 2001 Tax Incentive for 50 ppm S•Germany 2003 Tax Incentive for 10 ppm S•EU 2009 spec.? 100% of Mogaspool at 10 ppm S•EU 2003 + 10 ppm S driven by marketing5Prime-G+ Update – 12thEur. FCC Conference - Grace Davison Seminar – Seville - May 2004FCC Gasoline HDS Requirements•Maximize Octane Retention•Minimize H2Consumption•Reliability - Key Unit in the Refinery•Cycle Length equivalent to FCC Turn-around•Maximize Gasoline Yield without RVP Increase•Possibility to Control Olefins Content•Ability to Co-Process other S containing Streams•Ability to Meet Potential Future Specs.6Prime-G+ Update – 12thEur. FCC Conference - Grace Davison Seminar – Seville - May 2004Agenda•Gasoline Sulfur Control•Prime-G+ Technology Update•Prime-G+ Commercial Update•The Industrial Experience•Axens’ Integrated Offer7Prime-G+ Update – 12thEur. FCC Conference - Grace Davison Seminar – Seville - May 2004Prime-G+ - 10-50 ppm SulfurSelective HDSSplitter65 °C+H2Make-upFull RangeCracked NaphthaIBP-65 °C to Pool after SweeteningLow SulfurHeavy Gasoline10 - 50 ppm SPrime-G+Dual CatalyticSystem8Prime-G+ Update – 12thEur. FCC Conference - Grace Davison Seminar – Seville - May 2004HDO vs. HDS:Conventional and Prime-G+Extentof HDOExtent of HDS4-8 PointRoad OctaneDifference

C o n v e n t i o n a l P r i m e - G +1stcatalyst2ndcatalyst9Prime-G+ Update – 12thEur. FCC Conference - Grace Davison Seminar – Seville - May 2004Prime-G+ HDS Benefits•High performance•Deep HDS (less than 10 wppm product S)•Low Octane Loss, Low product mercaptan•Low Cost and Utilities•Well suited for idle units reutilization•Simple and Reliable Process•Easy operation•Excellent stability•Industrially proven at Ultra Low Product Sulfur•Ability to Co-process other Streams than FCC10Prime-G+ Update – 12thEur. FCC Conference - Grace Davison Seminar – Seville - May 2004Prime-G+ Process10-50 ppm Sulfur SpecSplitterHCN65 °C +H2Make-upFRCNPrime-G+SelectiveHydrogenationUltra Low S LCN toPool, TAME or Alky UnitUltra-LowSulfurGasolinePrime-G+Dual CatalystReactor System11Prime-G+ Update – 12thEur. FCC Conference - Grace Davison Seminar – Seville - May 2004Prime-G+ 1stStep - SHU + Splitter•Removes Diolefins from HCN•Minimizes pressure drop in selective HDS•Allows to achieve longcycles on selective HDS•Removes Diolefins from LCN•Feed preparation for alkylation or etherification•Converts Lt. Mercaptans/Sulfides to Heavy Sulfur•Very low sulfur LCN product•No need for extractive sweetening•Isomerizes External Olefins into Internal Olefins•Moderate octane gain on LCN12Prime-G+ Update – 12thEur. FCC Conference - Grace Davison Seminar – Seville - May 2004SHU Performance &Mercaptans ConversionFRCNPrime-G+SHULCN (65°C-)25.5 % volS = 261 ppmRSH = 239 ppmS = 587 ppmRSH = 54 ppmMAV=10BrNo=60(R+M)/2=86.0HCN (65°C+)74.5 % volS = 703 ppmLCN (65°C-)25.5 % volS = 14 ppmRSH = 1 ppmHCN (65°C+)74.5 % volS = 775 ppmMAV < 2BrNo=59(R+M)/2=86.2H2FRCN13Prime-G+ Update – 12thEur. FCC Conference - Grace Davison Seminar – Seville - May 2004Agenda•Gasoline Sulfur Control•Prime-G+ Technology Update•Prime-G+ Commercial Update•The Industrial Experience•Axens’ Integrated Offer14Prime-G+ Update – 12thEur. FCC Conference - Grace Davison Seminar – Seville - May 20040.00.51.01.52.02.51995 1996 1997 1998 1999 2000 2001 2002 20030102030405060708090100Prime-G+ LicensingCumulative Capacity, MBPSDPrime-G/Prime-G+Number ofreferences2.23Prime-G(Non Selective HDS)Marketing ofPrime-G+ TechnologyAs of January 200415Prime-G+ Update – 12thEur. FCC Conference - Grace Davison Seminar – Seville - May 2004Prime-G+ FlexibilityLicensed Units - Design Range•Unit Capacity 2,500 - 115,000 BPD•Feed Sulfur 30 - 4,100 ppm•Olefins Content 15 - 55 vol. %•Feeds FCC Naphtha, light Coker Naphtha,LSR, Steam-Cracking Naphtha•Product S < 10 ppm16Prime-G+ Update – 12thEur. FCC Conference - Grace Davison Seminar – Seville - May 2004Prime-G+ Industrial Success•30 Prime-G+ units in operation at ULS•Technology Selection after Pilot Testing•Fast Track Projects•Less than 2 years between BEDP andOil In•Full Set of Axens services•Basic Engineering•Catalyst Supply•Assistance for Start-up•Follow-up of the unit•Advanced Control•All Axens Guarantees met17Prime-G+ Update – 12thEur. FCC Conference - Grace Davison Seminar – Seville - May 2004Agenda•Gasoline Sulfur Control•Prime-G+ Technology Update•Prime-G+ Commercial Update•The Industrial Experience•Axens’ Integrated Offer18Prime-G+ Update – 12thEur. FCC Conference - Grace Davison Seminar – Seville - May 2004Prime-G+First UnitGermany19Prime-G+ Update – 12thEur. FCC Conference - Grace Davison Seminar – Seville - May 2004Prime-G+ Commercial Achievements•SHU performance•HDS Octane Retention•Permanent On-spec Sulfur Production•SHU/HDS Mercaptan Control•Prime-G+ Unit Reliability•Unit response to feed upsets•Catalysts stability•Pressure Drop management20Prime-G+ Update – 12thEur. FCC Conference - Grace Davison Seminar – Seville - May 2004•Almost complete mercaptans removal•Doctor Test negative LCNRSHSulfur1002100< 2< 10SHUFeedLCNProductPrime-G+ SHU PerformanceMercaptans Removal21Prime-G+ Update – 12thEur. FCC Conference - Grace Davison Seminar – Seville - May 2004•Slight Octane Boost on SHU•Octane boost mostly concentrated on LCNRONMON94.082.094.382.2SHUFeedSHUProductPerformance Test ResultsPrime-G+ SHU PerformanceOctane Balance22Prime-G+ Update – 12thEur. FCC Conference - Grace Davison Seminar – Seville - May 2004On-Spec All the Time02004006000 100 200 300 400 500 600 700 800 900days on stream0204060Feed Sulfur (wt ppm)Product sulfur (wt ppm)23Prime-G+ Update – 12thEur. FCC Conference - Grace Davison Seminar – Seville - May 2004Prime-G+ HDS Octane RetentionTypical European UnitDelta MONDelta (R+M)/20.00.51.01.52.02.53.01009998979695Sulfur Reduction (%)Octane Loss24Prime-G+ Update – 12thEur. FCC Conference - Grace Davison Seminar – Seville - May 2004•Mercaptan Control in Product051015202530354045500 75 150 225 300 375 450 525 600 675 750 825 900Days on stream0510152025Product sulfur content, wtppmProduct RSH content, wtppm25Prime-G+ Update – 12thEur. FCC Conference - Grace Davison Seminar – Seville - May 2004Reliability - HDS catalysts stability0 100 200 300 400 500 600 700 800 900days on streamHDS catalystWABT26Prime-G+ Update – 12thEur. FCC Conference - Grace Davison Seminar – Seville - May 2004Normalized Pressure Drop,∆P(Flow Rate)2Reliability – Pressure Drop ManagementDP HDS catalyst 1DP HDS catalyst 20 100 200 300 400 500 600 700 800 900days on stream27Prime-G+ Update – 12thEur. FCC Conference - Grace Davison Seminar – Seville - May 2004Conclusion•Worldwide Trend towards ULS Fuels•10 ppm S today effective in Europe•Prime-G+ Leading Technology•90 References worldwide•30 units in operation (+ 7 Prime-G)•Industrially Proven at ULS (10 ppm S)•Technology Highly Flexible•Schemes with or without splitter•Flexible HDS Section•SHU upstream splitter28Prime-G+ UpdateFor more information, please visit our websitewww.axens.net