naphtha cracking

Download Naphtha cracking

Post on 19-Jan-2015

13.109 views

Category:

Technology

4 download

Embed Size (px)

DESCRIPTION

 

TRANSCRIPT

  • 1. Naphtha Cracking A presentation by : Niteesh Kumar Vats ME, Chemical Engg. IISc Bangalore

2. Cracking 3. Need for crackingLess valuableMore useful &products valuable productsCrackingmost of the gasoline/petrol is produced bycracking! 4. Naphtha?HistoricalPresent 5. Sources of naphtha*source- origbouk.ru/products.html 6. In 1891 The thermal crackingmethod was invented.Vladmir Shukov modified in 1908 William Burton In 1934 factory of Shukhov cracking process established at Baku, USSR. 1941: Standard Jersey developed the worlds first steamcracker at Baton Rouge. 7. Naphtha crackingPetroleum industry Hydrocracking Petrochemical industry Steam cracking 8. Motivation for steam cracking*source-2011-november_Olefinek eloallitasa.pdf The worldwide demand and production of olefins 1. 94% of the world propylene. 2. In Western Europe, 95% ofCurrently, production `````ethylene and 7075% ofthrough steam cracking 111propylene. 3. In Asia, 61% of ethylene. 9. Use of products of steam cracking of naphtha 10. Chemistry of steam cracking InitiationPropagationTermination 11. Process of steam cracking of naphthaNaphtha Pyrolysis section Fractionation andCompression SectionProduct recovery and Separation Section 12. Energy analysis in steam crackingsectionsSection Energy Energy lossrequiredpyrolysis 65% 75%fractionation 15% 25%andcompressionrecovery20% 15%section 13. Pyrolysis sectionNaphtha Pyrolysis furnaceTransfer line exchange(producing steam) Cracked gas 14. Products from separation sectionEthylene (24%) Propylene(20%)SeparationButadiene(3%)sectionBTX(1%) Petroleum ether(25%) 15. Steam cracking is the most energy-consuming process in the chemical industryand globally uses approximately 8% of thesectors total primary energy use. 16. Latest Development in steam cracking of naphthaAdvanced furnace materials Advanced distillation columnsMembranes 17. These latest developments innaphtha cracking can lead toapproximately 10% savings on theprocess energy used. 18. Alternative technologiesHydro-pyrolysisof naphthaCatalytic crackingof naphtha zeolite 19. How Catalytic cracking Technologies Save Energy? 1st way: Energy saving! Energy required in a pyrolysis furnaceIn the case of conventional steam cracking Activation EnergyEnergy without catalystsEnergy required in a reactor In the case ofcatalytic cracking technologiesActivation Energywith catalysts ThermodynamicOlefins and byproducts Energy requirement NaphthaProgress of Cracking Process 20. 2nd way:selectivity ofcatalyst 3rd way: Removal of coke 21. ConclusionPlenty of room for energy savings is possible insteam cracking. And Catalytic cracking technologiescan lead to energy saving up to 20%.90% chemical processesalready benefits from catalysis, so can steam cracking! 22. References Olefins from conventional and heavy feedstocks:Energy use in steam cracking and alternativeprocesses. Energy 31 (2006) 425-251By Tao Ren, Martin Patel, Kornelis Blok James. G. Speight (2006). The Chemistry andTechnology of Petroleum (4th ed.). CRC Press. Dr. Ram Prasad (2010). Petroleum refiningTechnology (1st edition). Khanna publishers

View more >