In our present work,a post-riser regeneration technology (PRRT) for fluid catalytic cracking (FCC) units was developed to deal with increasingly heavier feedsto
A new type of zeolite La-USL (ultra stable zeolite L (zeolite USL) modified by La),which has superior activity,stability and selectivity in catalytic cracking o
Increasingly serious leak problem in pipeline transportation has not only affected the operation of pipelines but also caused loss of precious resource and envi