For cumene cracking catalysts, it was found that when the formed coke was less than a certain amount, the intensity of ESR signal correlated well with the content of carbon.

• 发现,对于异丙苯催化裂解反应,在一定量的积炭范围内,顺磁共振信号强度与积炭中的碳含量有很好的对应关系,ESR锐吸收峰强度可以代表催化剂上的积炭量。