关键词: 煤, 石油, 烯烃, 技术经济

Abstract: Olefins are important platform chemicals，which support the development of other organic chemical products. From the point of views of energy security and resource reserves，development of coal-based olefins production is important for sustainable development of Chinese chemical industry. The methanol to olefins process based on coal gasification is in rapid development. This paper reviews major processes of oil to olefins (OTO) and coal to olefins (CTO)，compares the two processes from the aspects of feedstock price，technology，and applications，respectively. The results show that the CTO process is more competitive against the OTO process in raw material price，but it needs further improvement in overall technology and process integration.

Key words: coal, oil, olefins, techno-economy