Abstract: Recent advances in directly heated cracking process using heat carrier gas in industry were reviewed, focusing on the process composition, operating conditions, product yields, reaction mechanism and progresses of the processes of directly heated cracking using heat carrier gas. Finally, we provide the outlook for the future development of directly heated cracking process using heat carrier gas and draw a conclusion that directly heated cracking process using superheated steam produced by combustion of hydrogen and oxygen as heat carrier gas will have big development space in enhancing heat efficiency, lowering CO2 emission and on-line decoking, and will specially be one of the most promising techniques for high feedstock flexibility and high olefin yields.

Key words: heat carrier gas, directly heated cracking, hydrocarbons, olefins

摘要： 概述了以气体为热载体的石油烃直接加热裂解的主要工艺，分析对比了各裂解工艺的组成、运行条件、产物产率等技术经济指标，分别论述了其技术改进及发展状况. 指出热载气体直接加热裂解工艺具有原料适用性广、产物分布灵活、热效率较高和受结焦影响小等优点，但同时也有运行时间短、缺乏系统性研究数据等不足；并对热载气体直接加热石油烃裂解的研究前景进行了展望，指出以氢氧燃烧产生的过热水蒸汽作为热载气体的直接加热裂解工艺技术，在提高换热效率、降低碳排放、连续除焦等方面有很大发展空间，尤其在扩大裂解原料范围、提高烯烃产率方面具有广阔前景.

关键词: 热载气体, 直接加热裂解, 石油烃, 烯烃