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采用固定流化床反应器,研究了工艺条件对N2O一步氧化苯制苯酚反应及Fe-ZSM-5分子筛催化剂性能的影响。在固定流化床反应器性能考察的基础上,以单因素实验法系统考察了温度(300～500℃)、原料苯/N2O物质的量比(4∶1～16∶1)和操作气速(0.040～0.072m/s)等对反应过程的影响;并基于单因素实验结果,采用L9(34)正交实验设计,综合考察了温度、原料苯/N2O物质的量之比和操作气速对N2O一步氧化苯制苯酚反应过程规律及产物分布的影响。以苯酚收率最大为目标函数最终确定的相对适宜工艺条件为:温度430℃,原料苯/N2O摩尔物质的量之比9∶1,操作气速0.050m/s。在此条件下,苯酚的收率可达71.32%。
A fixed-bed reactor was used to study the effect of process conditions on the phenol reaction of benzene with N2O and the performance of Fe-ZSM-5 zeolite catalyst. Based on the investigation of the performance of the fixed fluidized bed reactor, the temperature (300 ~ 500 ℃), the ratio of feed benzene / N2O content (4:1 ~ 16:1) and operating gas velocity (0.040 ~ 0.072m / s) on the reaction process. Based on the single factor experimental results, L9 (34) orthogonal experimental design was used to comprehensively investigate the relationship between temperature, the ratio of benzene / On the Reaction Process and Product Distribution of Phenol from N2O Oxidation of Benzene. The optimum process conditions for the determination of the maximum phenol yield as the objective function are as follows: the temperature is 430 ℃, the molar ratio of benzene / N 2 O molar material is 9:1, and the operating gas velocity is 0.050 m / s. Under these conditions, the yield of phenol reached 71.32%.