GTL naphtha: Performance of this new ... - CMT Conferences

GTL naphtha:Performance of this tnew feedstock inSteam CrackingGTL PRODUCTS – COMBINING HIGHPERFORMANCE WITH LOWERENVIRONMENTAL IMPACT© 2007 Sasol ChevronNdumiso MathebulaPetchem Feedstock ConferenceShenzhen, China, May 2007

Presentation overview• Sasol Chevron• GTL process• Typical properties of GTL naphtha• Pilot plant test program to compare GTL naphtha anda Middle East high paraffin naphtha• Performance charts• Conclusions from test program• Sources of GTL naphtha (current and future)• Oryx GTL (Qatar)• Escravos GTL (Nigeria)• Commercial engagement© 2007 Sasol Chevron

Global Drive ForCleaner FuelsMatching the GTL challenge+Monetise AbundantGlobal Gas ReservesProven GTL TechnologyOperating ExperienceGTL Marketing ExperienceInternational PresenceMarketing ExpertiseE&P ExperienceInternational Deal MakingBuild, Own & Operate Plants - Market GTL ProductsGTL PRODUCTS – COMBINING HIGH PERFORMANCE WITHLOWER ENVIRONMENTAL IMPACT© 2007 Sasol Chevron

The GTL ProcessCH 4H 2naturalgasoxygenNaturalGasReformingFischer-syngasTropschConversionProductwaxysyncrudeUpgradingGTLnaphtha~30%GTLdiesel~70%O 2CON 2 toatmosphere© 2007 Sasol ChevronH 2 Oby-product

Typical properties of GTL naphthaProperties Units Typical valuesDensity @15 O CDistillationInitial Boiling Point10%50%90%End pointPONAAromaticsNaphthenesOlefinsParaffinsKg/m 3OCOCOCOCOCVol%Vol%Vol%Vol%6802553100125150-185

GTL naphtha comparativetest program• In 2006 Sasol Chevron approached KBR (formerly KelloggBrown & Root) in Houston to conduct test program• KBR has a pyrolysis pilot plant in Houston• Reputable and large technology supplier for steamcracking• Experience in testing various types of naphtha and theyhave modelling capability within the group• Sourced GTL naphtha from Sasol’s s Fischer Tropsch pilotplant in South Africa• Sourced high paraffin light naphtha from a large well knownMiddle East (ME) producer© 2007 Sasol Chevron

GTL naphtha comparativetest program• The pilot plant test program was designed to determine theyields of GTL naphtha and a ME naphtha for a range ofcracking severity from maximum ethylene to maximumpropylene (P/E range of 0.40 to 0.70)• KBR’s pilot plant is capable of operating over a wide rangeof residence times (20 to 600 milliseconds) which covers therange of essentially all modern pyrolysis furnaces• The pilot plant was decoked before and after each feed toprovide a general indication of the coking tendency of GTLnaphtha compared to the ME naphtha© 2007 Sasol Chevron

Properties of the two types of naphtha testedSpecific GravitySulphur (ppm wt)Composition (%)n-paraffinsi-paraffinsTotal ParaffinsOlefinsNaphthenesAromaticsTotalGTLnaphtha0.682

Distillation180160140Temperature (°C)1201008060GTL NaphthaME Naphtha402000 20 40 60 80 100Recovered (% vol.)© 2007 Sasol Chevron

Average cracking temperatureCracking TemperatureGTL NaphthaME Naphtha0.40 0.45 0.50 0.55 0.60 0.65 0.70Cracking Severity (P/E Ratio)© 2007 Sasol Chevron

Total olefins yield5452GTL NaphthaTotal Olefins (wt %)50484644ME Naphtha42400.40 0.45 0.50 0.55 0.60 0.65 0.70Cracking Severity (P/E Ratio)© 2007 Sasol Chevron

Ethylene yield363432Ethylene Yield (wt %)302826ME NaphthaGTL Naphtha2422200.40 0.45 0.50 0.55 0.60 0.65 0.70Cracking Severity (P/E Ratio)© 2007 Sasol Chevron

Propylene yield2018Propylene Yield (wt %)1614GTL NaphthaME Naphtha12100.40 0.45 0.50 0.55 0.60 0.65 0.70Cracking Severity (P/E Ratio)© 2007 Sasol Chevron

Methane make1816Methane Yield (wt %)141210GTL NaphthaME Naphtha860.40 0.45 0.50 0.55 0.60 0.65 0.70Cracking Severity (P/E Ratio)© 2007 Sasol Chevron

C5+ liquids yield282624C5+ Liquids Yield (wt %)22201816ME NaphthaGTL Naphtha1412100.40 0.45 0.50 0.55 0.60 0.65 0.70Cracking Severity (P/E Ratio)© 2007 Sasol Chevron

Conclusions from test program• GTL naphtha produces more olefins than a comparableMiddle East high paraffin• GTL naphtha is ideally suited for the production of lightolefins• Facilities geared for maximising ethylene can benefit fromcracking GTL naphtha• Coking rate is lower, resulting in extended runs• Opportunity to blend due to high paraffin content© 2007 Sasol Chevron

Where is GTL naphtha likely to comefrom?GTLMarketsGasReserves© 2007 Sasol Chevron• Large gas reserves (>20 TCF)• Economic gas feedstock• Access to the open ocean

49% 51%© 2007 Sasol ChevronSasol Chevron markets theventure’s s GTL diesel and GTLnaphtha

1 000 bbl/dLPG9 000 bbl/dGTL naphtha24 000 bbl/dGTL diesel© 2007 Sasol Chevron

EGTL StatisticsEscravos Terminal1,000 bpd of LPG9,000 bpd of GTL naphtha24,000 bpd GTL dieselEscravos GTL PlantEscravos Gas PlantFeasibility – April 1998FEED – July 2001EPC – April 2005© 2007 Sasol Chevron

Escravos GTL Plant© 2007 Sasol Chevron

Commercial Engagement• Several introductory cargo will be supplied to a number ofbuyers.• To follow, is a term contract phase• Can supply test samples to interested parties© 2007 Sasol Chevron

THANK YOUGTL NAPHTHA – COMBINING HIGH PERFORMANCE WITHLOWER ENVIRONMENTAL IMPACT© 2007 Sasol Chevron