乙烯在国民经济中占有重要的地位。其生产规模和水平已经成为衡量一个国家石化行业发展水平的重要标志之一。由于乙烯原料的轻质化以及新生产工艺路线的兴起,全球乙烯市场格局正在发生着深刻变化。在2020年之前,全球乙烯新建装置将主要在北美和中国。原料和工艺发生变化乙烯常见的原料有石脑油、乙烷、丙烷、丁烷、煤/甲醇。其中,石脑油裂解是乙烯重要的来源。2005年之前,全球通过石脑油裂解制乙烯的产量达到乙烯总产量的55%左 Ethylene occupies an important position in the national economy. Its production scale and level have become one of the important indicators to measure the development level of a country’s petrochemical industry. Due to the light of ethylene raw materials and the rise of new production routes, the global ethylene market is undergoing profound changes. By 2020, the global ethylene new installations will be mainly in North America and China. Changes in raw materials and processes Common ethylene raw materials are naphtha, ethane, propane, butane, coal / methanol. Among them, naphtha cracking is an important source of ethylene. Before 2005, the global ethylene production by naphtha cracking reached 55% of total ethylene production