OLEFINS PRODUCTION - TVK

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Characteristics of steam cracking15What is steam cracking?Steam cracking is a pyrolysis processA hydrocarbon mixture is heated in metal tubes inside afurnace in the presence of steam to a temperature atwhich the hydrocarbon molecules thermally decomposesFor ethane the primary reaction is dehydrogenationC2H6 → H2C=CH2 + H2Other free radical reactions also occur– Cracking and dehydrogenation of longer molecules resulting inhydrogen, methane, ethylene, propylene, butadiene and heavier– Continued dehydrogenation to form acetylene, aromatics andcokeThese reactions require a residence time of less thanone second and are endothermic16
Principle of the cracking process17Tasks of a cracking furnaceProduction of ethylene and propylene byendothermic cracking reactionPreheating of feed and dilution steam byutilization of waste heatCooling of the cracked gas to freeze chemicalreactionsProduction of superheated HP steam byutilization of waste heat18
Page 1 and 2: OLEFINS PRODUCTIONOlefins by steam
Page 3 and 4: Building block for petrochemicals -
Page 5 and 6: Hungary: ethylene produced by TVK o
Page 7: Ethylene at TVK1975: First steam cr
Page 12 and 13: Wide range of feedstocksGaseous fee
Page 14 and 15: Considerations for feedstocksParaff
Page 16 and 17: Olefin process overview31Cracking f
Page 18 and 19: Hot section in O-2OFurther cracked
Page 20 and 21: Cold section block diagram39Cold se
Page 22 and 23: About safetySafety first concept ha
Page 24 and 25: Example for risk reduction: selecti
Page 26 and 27: Control systems in O-2O51Key equipm
Page 28 and 29: Crack gas compressor O-2 O 2 plant2
Page 30 and 31: Turbine driven BFW pump59Multistage
Page 32: Ethylene production costBasis: WE 2

OLEFINS PRODUCTION - TVK

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