臭氧在对硝基苯酚溶液中的吸收与模拟过程  

Simulation of ozone Absorption in aqueous solutions of p-nitroaniline

作　　者：沈慧芳[1] 程江[1] 陈焕钦[1] 

机构地区：[1]华南理工大学化工学院,广东广州510640

出　　处：《化学工程》2005年第1期5-8,共4页Chemical Engineering(China)

摘　　要：研究了鼓泡塔中臭氧在对硝基苯酚溶液中的吸收传质过程。首先探讨了pH值和气速对对硝基苯酚降解速率的影响。在 298K下,臭氧被连续通入对硝基苯酚溶液中,臭氧的传质速率因为溶解臭氧与对硝基苯酚的快速反应而大大加强。然后运用与实验条件相同的操作参数,进行了臭氧在鼓泡塔中吸收过程的模拟研究,采用MATLAB软件求解吸收过程的质量平衡方程,模拟了吸收过程中臭氧和对硝基苯酚浓度的变化,并与实验值进行了比较。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,在 80%的对硝基苯酚降解之前,模拟值和实验值能很好地一致。The mass transfer of gaseous ozone in the bubble column containing p-nitrophenol solutions was studied. The influence of pH value, superficial velocity of the gas phase on the destruction rate of p-nitrophenol was (discussed). Absorption experiments were carried out under semibatch mode by continued injection of gaseous ozone into a bubble column containing p-nitrophenol solutions at 298 K. The mass transfer rate of ozone was enhanced greatly because of the influence of a fast reaction between the dissolved ozone and p-nitrophenol. The simulations of ozone Absorption the same as the experiments in the bubble column were performed. The mass balance equations (about) (ozone) Absorption in p-nitrophenol solution in a bubble (column) operating in the complete mixing model were solved by utilizing the MATLAB ODE program. The ozone concentrations and the concentrations of p-nitrophenol during (Absorption) experiment were simulated. The results were compared with the measured concentrations. The simulated results indicated that it was desirable to consider the gas phase and the liquid phase in short bubble (column) as a complete mixing flow. The simulated results show that the simulated concentrations of p-nitrophenol (agree) well with the measured concentrations up to 80% consumption of p-nitrophenol. As the p-nitrophenol (concentration) declines to certain level, there are a few of deviations between the simulated and measured concentrations.

关 键 词：鼓泡塔 吸收过程 对硝基苯酚 溶液 传质过程 传质速率 臭氧 酚降解 解吸 pH值 

分 类 号：O647.3[理学—物理化学] X703[理学—化学]