CAS Key Laboratory of Green Process and Engineering;
Institute of Process Engineering;
Chinese Academy of Sciences;
Beijing 100190;
China;
School of Chemical Engineering;
University of Chinese Academy of Sciences;
Beijing 100049;
China 3 PetroChina Petrochemical Research Institute;
Beijing 102206;
China;
Internals; Phase; holdup; Backmixing; Slightly-expanded-bed; reactor; Multiphase; flow; Hydrodynamics;