The cause of undesirable block material in PP gas phase reactor is introduced in the paper, relevant prevention measures and solutions are also introduced.

The gas-solid reaction mechanism was studied in the tank reactor. It was found that the reaction rate was controlled by the interdiffusion and intrinsic chemical reaction.

Instantaneous mass transfer of gas-microdroplet two-phase flow is one of the most important procedures in the field of chemical engineering, colloid science and environment science.