High catalyst to oil ratio mainly leads to carbenium ion catalytic reaction, which LPG and coke yields were remarkably increased but dry gas yield was basically unchanged.
由剂油比增加引起的过裂化属于过度催化反应，过裂化点后液化气和焦炭产率出现明显增加的趋势，但干气产率基本上没有变化。
Owing to the short residence time, more uniform gas-solid flow and reduced backmixing of downer reactor, it can obtain more object products and the dry gas yield can be inhibited.
由于下行床具有短停留时间、气固流动更均匀和返混小的优点，能获得更高的产品收率，使干气收率受到抑制。
To improve the heavy oil atomization situation of FCC feed stock and decrease the yield of carbon and dry gas, the feed stock, heavy oil, is emulsified.
为改善催化裂化原料油雾化状况，降低结焦和干气收率，将原料重油进行乳化。
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