臭氧与对硝基苯酚溶液在鼓泡塔中反应的模拟(英文)

Simulation of Ozone Reaction with p-Nitrophenol Solution in Bubble Column

研究了鼓泡塔中臭氧与对硝基苯酚水溶液反应的吸收传质过程.首先在半连续状态及298K下,将 气相臭氧连续注入盛有对硝基苯酚溶液的鼓泡塔中进行吸收实验,并对吸收过程进行模拟.然后运用全混流 模型,建立了臭氧吸收过程的质量平衡方程.采用Matlab软件中的ODE程序求解该质量平衡方程和增强因 子的联立方程,模拟吸收过程中臭氧和对硝基苯胺浓度的变化,并与实验值进行比较.发现在合适的pH值 下,在80%的对硝基苯酚降解之前,模拟值和实验值吻合较好,当对硝基苯酚的浓度下降到某一值时,模拟 值和实验值出现一定的偏差.研究结果表明,在短的鼓泡塔中,应用全混流模型来描述气相和液相的流体状 态是可行的.

The absorption and mass transfer process of ozone reaction with p-nitrophenol solution in the bubble column was investigated in this paper. First, absorption experiments were carried out in semibatch mode by continuously injecting gaseous ozone into a bubble column containing p-nitrophenol solution at 298K, and the absorption process was simulated. Next, the mass balance equations of ozone absorption in p-nitrophenol solution were established by using the complete mixing model. Then, by utilizing the Matlab ODE program, the simultaneous equations of the mass balance equations and the enhancing factors were solved, thus simulating the variations of ozone concentration and p-nitrophenol concentration in the absorption process. The simulated results were finally compared with the measured ones. It is shown that, at appropriate pH, the simulated results accord well with the measured ones as far as 80% p-nitrophenol is degraded, while there is a certain deviation when p-nitrophenol concentration declines to a certain level. It is also indicated that the complete mixing model is feasible to describe the fluid flow states in both gas and liquid phases in a short bubble column.