综述了不同环烷烃催化裂化反应途径及主要影响条件,在催化裂解下双环及多环的开环反应容易发生,生成含单环环烷烃的裂解产物。在环烷烃的转化当中存在裂化反应和氢转移的竞争关系,当环烷烃与链烷烃共存时,会影响链烷烃的低碳烯烃收率和选择性。环烷烃催化裂解制低碳烯烃的关键是单环环烷烃的开环和抑制氢转移反应。用于富含环烷烃原料催化裂解的催化剂应具有高的开环和裂化能力以及低的氢转移能力。

Catalytic cracking reaction pathways for different cycloalkanes and key affecting factors are reviewed.Under deep catalytic cracking (DCC) reaction conditions,the ring-opening reactions for bicyclic and polycyclic hydrocarbons are prone to happen to produce small cracking products including monocyclic cycloalkanes.There is a competitive relationship between cracking reaction and hydrogen transfer in the conversion process of cycloalkanes.The coexisting of cycloalkanes and paraffin can affect the yield and selectivity of light olefins from paraffin.Promoting monocyclic cycloalkanes to open ring while suppressing its hydrogen transfer reaction are crucial for the catalytic cracking of cycloalkanes into light olefins.The catalysts for the deep catalytic cracking of cycloalkane-rich feedstocks should have strong ring opening and cracking abilities,and a low hydrogen transfer ability.

胡柳琴(1996-),女,硕士生;朱根权(1968-),男,博士,研究员,研究方向为催化裂化工艺,通讯联系人,zhugq.ripp@sinopec.com。