1. State Key Laboratory of Heavy Oil Processing(5)

烃类水蒸气热裂解增产丙烯的问题

Steam cracking supply most of the propylene蒸汽裂解提供大部分丙烯

Free radical reaction 游离基反应

Disadvantages：缺点：

High cost of raw material due to the lack of high quality feedstock由于缺少优质的进料，原料成本高

High operation cost due to the high temperature in reaction and low temperature in separation由于反应高温而分离低温，带来高操作成本

Low propylene to ethylene ratio due to reaction mechanism, while propylene market increase faster than ethylene由于反应机制造成低丙烯/乙烯比例，而丙烯市场增长快于乙烯

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