Abstract：In order to realize the commercial production of phenol by the one-step oxidation of benzene with nitrous oxide (N2O), a kind of industrial Fe-ZSM-5 zeolite pellets with size of Æ1.5 mm×1 mm was prepared. Moreover, the catalytic performance of the prepared zeolite pellets was experimentally evaluated in an isothermal fixed bed integral reactor. The effects of the operating parameters, i.e., temperature (375-475 ℃), space velocity (2 500-10 500 h-1) and benzene/N2O molar ratio (6:1-14:1) on the reaction process and the product distribution were systematically investigated based on the combination of the single-factor test method and orthogonal test design [L9(34)]. The results showed that the prepared Fe-ZSM-5 zeolite had a good catalytic activity and selectivity on the one-step oxidation process of benzene to phenol with N2O. The prepared zeolite exhibited high initial catalytic activity but deactivated rapidly. Thus, the selection of optimal operating conditions is critical to the performance of the Fe-ZSM-5 zeolite. Based on the orthogonal experimental analysis, the relative optimum operating conditions are as follows: temperature 425-450 ℃, space velocity 4 500-5 500 h-1 and molar ratio of benzene to N2O 8:1-10:1. Under these conditions, the yield of phenol can reach over 60%.
Qiu Zhengpu,Ouyang Cui,Li Jianwei et al. Study on Process Conditions for One-Step Oxidation of Benzene to Phenol with Nitrous Oxide over Industrial Fe-ZSM-5 Zeolite Pellets[J]. 化学反应工程与工艺, 2016, 32(5): 408-414.
