关键词: 重质石油烃, 气化, 裂解, 合成气, 烯烃

Abstract: China is such a developing country of lacking petroleum resource, its petroleum supply depends highly upon the world petroleum market. Developing the techniques for heavy hydrocarbons utilization is becoming a critical task to the energy and petrochemical industries in China, because of the gradual decrease of light crude oil and the increasing demand on light petro-products. Delayed coking, visbreaking, catalytic cracking and hydroconversion are primary technologies at present, while the pyrolysis and gasification present potentials in heavy hydrocarbons processing. An integrated gasification-pyrolysis process is proposed in this paper, in order to produce the syngas and light olefins by gasification and pyrolysis of heavy hydrocarbons with heat supply by the combustion of coke produced during pyrolysis. Simulation studies show that the production of syngas and light olefins will be achieved with controlling the temperature of gasification-pyrolysis process by adjusting the feeds of O2 and steam, even at the condition without fuel feeding. The maximum composition of light olefins can be found in product stream in the case of short residence time.

Key words: heavy hydrocarbons, gasification, pyrolysis, syngas, olefins