The retention volumes of benzene are measured on five cracking catalysts with different contents of coke deposit, and the five lines of log V_g-1/T are obtained.

• 测定了苯在五种积炭量不同的催化裂化衰化系列催化剂上的保留体积,发现它们的logV_g对1/T直线有一共同交点。