![]() ![]() The CĢ stream contains acetylene, which is explosive above 200 kPa (29 psi). The overhead stream from the deethanizer tower consists of all the CĢ's that were in the cracked gas stream. the bottom stream from the demethanizer tower goes to the deethanizer tower.Methane recovery is critical to the economical operation of an ethylene plant. ![]() Cryogenically (−250 ☏ (−157 ☌)) treating this overhead stream separates hydrogen from methane. The overhead stream from the demethanizer tower consists of all the hydrogen and methane that was in the cracked gas stream. all of the cold cracked gas stream goes to the demethanizer tower.hydrogen sulfide and carbon dioxide removal (acid gas removal).primary compression of the cracked gas (3 stages of compression).a dilution steam recycle system between the furnaces and the quench system.primary and secondary heat recovery with quench.
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