水力空化场对水解离过程中羟基自由基的影响

Influence of hydraulic cavitation field on hydroxyl radical in hydrolysis process

水力空化对化学反应的强化作用取决于空化引发自由基的数量,自由基越多空化效果越好。以甲基紫溶液(MV)作为羟基自由基的捕捉剂,利用紫外-可见分光光度法测量水力空化过程中释放的·OH自由基产生量。考察了反应终温、物料加入量和反应时间对水力空化过程中·OH自由基产生量的影响,得出有利于空化发生以及提高空化作用强度的适宜操作条件。

The strengthening effect of hydraulic cavitation on chemical reaction depends on the number of free radicals induced in hydraulic cavitation,and the more the free radicals,the better the cavitation effect. The generation amount of ·OH radicals in the hydraulic cavitation process is determined by ultraviolet-visible spectrophotometer,using methyl violet solution(MV） as the catcher for hydroxyl radical. The effects of temperature at reaction end,addition amount of materials and reaction time on the generation amount of ·OH radicals in the hydraulic cavitation process are investigated and the suitable operating conditions that are benefit to cavitation and can help to strengthen hydrodynamic cavitation are obtained.