随着原油变重和硫含量升高 ,越来越多的炼油厂在ＦＣＣ装置中加大进料量和渣油掺炼率。结果导致汽油中烯烃含量升高。进料量提高缩短了催化剂和原料的接触时间 ,减少了烯烃饱和的氢转移反应。在操作中发现 ,随着进料掺炼渣油比例的提高 ,ＦＣＣ汽油中烯烃含量也随之升高。虽然 As crude oil becomes heavier and sulfur content increases, more and more refineries increase feed and residue dosing rates in FCC units. The result is an increase in the olefin content of the gasoline. Higher feed rates shorten the contact time between the catalyst and the feedstock and reduce the olefin-saturated hydrogen transfer reaction. In operation, it was found that the olefin content in FCC gasoline also increased with the increase of the proportion of feed blend residue. although