石油圈????中國石化新聞網訊 近年來全球丙烯需求增長迅速，石腦油裂解和煉油廠催化裂化等傳統工藝生產的丙烯難以跟上需求快速增長的步伐。在過去五年中，全球丙烯需求以年均近5%的速度快速增長，其中一些發展中國家的增速是全球平均增速的2至3倍。例如，2012年至2016年期間中國市場的丙烯需求年均增速達到15.5%。 ????當前全球大部分丙烯供應來自于乙烯裂解裝置和煉油廠催化裂化裝置生產的副產品。乙烯裂解裝置生產的主要產品是乙烯，而催化裂化裝置的主要產品是汽油。由于乙烯和汽油的需求增速遠低于丙烯需求增速，而且裂解裝置原料輕質化趨勢導致丙烯收率大幅下降，因此要確保丙烯供應能夠滿足需求，必須實施替代生產工藝。在少數幾個以丙烯生產為重點的生產工藝中，丙烷脫氫(PDH)已被證明是最有效的生產工藝。目前，全球投入運營的PDH裝置已經有26套，第27套裝置計劃于2018年初在阿布扎比開始投產。 ????張春曉 摘譯自 《HP》2017年12月刊 ????原文如下：
????Propane dehydrogenation technology is transforming the propylene business ????Propylene demand has been increasing rapidly in recent years, and traditional processes are struggling to keep up. Propylene demand has increased at an average rate of nearly 5%/yr in the past 5 yr, with some developing countries growing at two to three times that rate. In China, for example, average annual propylene demand grew by 15.5%/yr between 2012 and 2016.
????The majority of the world’s propylene supply comes from coproduct processes, which are run primarily to make a product other than propylene. As demand for those alternate products—either ethylene or gasoline—grows more slowly than propylene, alternative processes must be implemented to ensure that supply could satisfy demand. Out of the few processes that have emerged that focus on propylene production, propane dehydrogenation (PDH) has proven to be the most effective tool. At present, 26 PDH plants are operating worldwide, with a 27th plant scheduled to begin operations in Abu Dhabi in early 2018.
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