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Numerical Simulation of Photocatalytic Degradation of Terbuthylazine in a Continuous Stirred Tank Reactor | ||
| Pollution | ||
| دوره 8، شماره 4، مهر 2022، صفحه 1116-1126 اصل مقاله (1.4 M) | ||
| نوع مقاله: Original Research Paper | ||
| شناسه دیجیتال (DOI): 10.22059/poll.2022.338440.1355 | ||
| نویسندگان | ||
| Jiahao He؛ Baoqing Deng* | ||
| Department of Environmental Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, P R China | ||
| چکیده | ||
| A mathematical model is presented to simulate the photocatalytic degradation of terbuthylazine in a continuous stirred tank reactor. The flow field is described by the continuity equation and the momentum equation. An advection-diffusion-reaction equation is used to simulate the transport of terbuthylazine. The chemical reactions take place on the inner wall surface coated with the catalyst, which is described by a third-kind boundary condition. A transient differential equation is used to describe the variation of inlet concentration with time. All governing equations are solved using the commercial computational fluid software ANSYS Fluent. The simulation results agree with the experimental data at different temperatures and different flow rates. The radial distribution of terbuthylazine in the reactor is discussed in detail. The velocity depicts a parabolic curve with a maximum velocity of 0.0005 m s-1, 0.001 m s-1, 0.00022 m s-1 and 0.0032 m s-1 for 50 mL min-1, 100 mL min-1, 200 mL min-1, and 300 mL min-1, respectively. At the flow rate of 300 mL min-1, concentration of terbuthylazine decreases from 3.6 mg dm-3 to 0.8 mg dm-3 whereas concentration of cyanuric acid increases from 0.05 mg dm-3 to 0.28 mg dm-3. It shows that the radial effect of velocity and concentration should be taken into account. The mathematical model used in this study is suitable for simulating the photocatalytic degradation process of terbuthylazine in continuous stirred tank reactors. | ||
| کلیدواژهها | ||
| Terbuthylazine؛ Continuous stirred-tank reactors؛ Photocatalytic degradation؛ Computational fluid dynamics | ||
| مراجع | ||
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Avasarala, B. K., Tirukkovalluri, S. R. and Bojja, S. (2011). Photocatalytic degradation of monocrotophos pesticide—an endocrine disruptor by magnesium doped titania. Journal of hazardous materials,186 (2-3),1234–1240. Ayati, A., Ahmadpour, A., Bamoharram, F. F., Tanhaei, B., M¨antt¨ari, M. and Sillanp¨a¨a, M. (2014). A review on catalytic applications of Au/TiO2 nanoparticles in the removal of water pollutant. Chemosphere,107,163–174. Botta, S. G., Rodr´ıguez, D. J., Leyva, A. G. and Litter, M. I. (2002). Features of the transformation of HgII by heterogeneous photocatalysis over TiO2. Catalysis today,76 (2-4),247–258. Calder´on, C. J. and Ancheyta, J. (2018). Modeling of CSTR and SPR small-scale isothermal reactors for heavy oil hydrocracking and hydrotreating. Fuel,216,852–860. Cao, Z., Wu, Q., Zhou, H., Chen, P. and You, F. (2020). Dynamic modeling, systematic analysis, and operation optimization for shell entrained-flow heavy residue gasifier. Energy,197,117220. Chen, C., Yang, S., Guo, Y., Sun, C., Gu, C. and Xu, B. (2009). Photolytic destruction of endocrine disruptor atrazine in aqueous solution under UV irradiation: products and pathways. Journal of hazardous materials,172 (2-3),675–684. Cheng, K.-C. (2020). Kinetic model of hyperbranched polymers formed by self-condensing vinyl polymerization of inimers and trifunctional cores with different reactivities in a continuous-stirred tank reactor. Chemical Engineering and Processing - Process Intensification,147,107739. Jeppu, G. P., Clement, T. P., Barnett, M. O. and Lee, K.-K. (2012). A modified batch reactor system to study equilibrium-reactive transport problems. Journal of contaminant hydrology,129,2–9. Kanaujiya, D. K. and Pakshirajan, K. (2022). Mass balance and kinetics of biodegradation of endocrine disrupting phthalates by Cellulosimicrobium funkei in a continuous stirred tank reactor system. Bioresource Technology,344,126172. Le Cunff, J., Tomaˇsi´c, V. and Gomzi, Z. (2018). Photocatalytic degradation of terbuthylazine: Modelling of a batch recirculating device. Journal of Photochemistry and Photobiology A: Chemistry,353,159–170. Lefebvre, J., Trudel, N., Bajohr, S. and Kolb, T. (2018). A study on three-phase CO2 methanation reaction kinetics in a continuous stirred-tank slurry reactor. Fuel,217,151–159. Malato, S., Fern´andez-Ib´an˜ez, P., Maldonado, M. I., Blanco, J. and Gernjak, W. (2009). Decontamination and disinfection of water by solar photocatalysis: recent overview and trends. Catalysis today,147 (1),1–59. Ri, P.-C., Kim, J.-S., Kim, T.-R., Pang, C.-H., Mun, H.-G., Pak, G.-C. and Ren, N.-Q. (2019). Effect of hydraulic retention time on the hydrogen production in a horizontal and vertical continuous stirred-tank reactor. International Journal of Hydrogen Energy,44 (33),17742–17749. Rizzo, L. (2011). Bioassays as a tool for evaluating advanced oxidation processes in water and wastewater treatment. Water research,45 (15),4311–4340. Roudsari, S. F., Ein-Mozaffari, F. and Dhib, R. (2013). Use of CFD in modeling MMA solution polymerization in a CSTR. Chemical engineering journal,219,429–442. Salmi, T., Tolvanen, P., Er¨anen, K., W¨arn˚a, J., Leveneur, S. and Haario, H. (2022). Determination of kinetic constants by using transient temperature data from continuous stirred tank reactors. Chemical Engineering Science,248,117164. Sommer, D. E. and Kirchen, P. (2019). Towards improved partial oxidation product yield in mixed ionic-electronic membrane reactors using CSTR and CFD modelling. Chemical Engineering Science,195,11–22. Srirugsa, T., Prasertsan, S., Theppaya, T., Leevijit, T. and Prasertsan, P. (2017). Comparative study of Rushton and paddle turbines performance for biohydrogen production from palm oil mill effluent in a continuous stirred tank reactor under thermophilic condition. Chemical Engineering Science,174,354–364. Tang, J., Chen, Y. and Dong, Z. (2019). Effect of crystalline structure on terbuthylazine degradation by H2O2-assisted TiO2 photocatalysis under visible irradiation. Journal of Environmental Sciences,79,153–160. Tsapekos, P., Kougias, P. G., Kuthiala, S. and Angelidaki, I. (2018). Co-digestion and model simulations of source separated municipal organic waste with cattle manure under batch and continuously stirred tank reactors. Energy Conversion and Management,159,1–6. | ||
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