In addition, flow pattern of catalyst in gasoline riser has been studied and the result shows that gas solid contact in the riser was in the form of densephase force transfer.
通过对汽油提升管内催化剂流动形式的分析，提升管内气固接触形式为密相气力输送。
2
Densephase in downer was much more difficult to observe than in riser due to its shorter duration time, smaller size and lower density.