Browse > Article
http://dx.doi.org/10.9713/kcer.2021.59.4.584

Characterization of Repeated Deactivation and Subsequent Re-activation of Photocatalyst Used in Two Alternatively-operating UV/photocatalytic Reactors of Waste-air Treating System  

Lee, Eun Ju (Department of Chemical Engineering, Daegu University)
Chung, Chan Hong (Department of Chemical Engineering, Daegu University)
Lim, Kwang-Hee (Department of Chemical Engineering, Daegu University)
Publication Information
Korean Chemical Engineering Research / v.59, no.4, 2021 , pp. 584-595 More about this Journal
Abstract
In this study, the correlation between operating stages of waste air-treating system composed of two alternatively-operating UV/photocatalytic reactors, and the deactivation of photocatalyst used in each operating stage, was investigated by instrumental analysis thereon. The repeated deactivation and subsequent re-generation of photocatalyst used in the waste air treating system of previous investigation performed by Lee and Lim (Korean Chem. Eng. Research, 59(4), 574-583(2021)), were characterized on virgin photocatalyst-carrying porous SiO2 media (A4), used photocatalyst-carrying porous SiO2 media (A1, A2 and A3) collected from the corresponding photocatalytic reactor upon 1st, 2nd, and 3rd run, respectively, regenerated photocatalyst-carrying porous SiO2 media upon 1 time-run (AD1) and 3 times regenerated photocatalyst-carrying porous SiO2 media upon 3 time-runs (AD3) by instrumental analysis including BET analysis, SEM, XPS, SEM-EDS and FT-IR. As a result, the proper regeneration-temperature for deactivated photocatalyst to be regenerated several times (more than 3 times), was suggested below 200 ℃. Such temperature of deactivated photocatalyst-regeneration was almost consistent to the one, according to BET analysis, at which tiny nano-pores blocked by adsorbed ethanol-oxidative and degraded intermediates (AEODI), were regenerated to be reopened through almost complete mineralization of AEODI. In particular, the results of XPS analysis indicated an incurrence of insignificant deactivation of photocatalysis upon 1st run of UV/photocatalytic reactor (A or C) of the previous investigation. In addition, the results of XPS analysis were consistent with the experimental results of the previous investigation in that 1) deactivation of photocatalyst incurred during 2nd run of the UV/photocatalytic reactor (A or C) resulted in decreased removal efficiency, by ca. 5% and 5%, of ethanol and hydrogen sulfide, respectively, compared with its 1st run; 2) there was insignificant difference between the removal efficiencies of its 2nd run and 3rd run. Furthermore, the removal efficiencies of ethanol and hydrogen sulfide for hypothetical 4th run of photocatalytic reactor in the previous investigation, using AD3, were expected to decrease, compared with its 3rd run, by much more than those for 2nd run in the previous investigation did, compared with its 1st run.
Keywords
Waste-air; Alternatively-operating; UV/photocatalytic reactor; Photocatalyst; Deactivation; Regeneration;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Lee, E. J. and Lim, K.-H., "Performance of Waste-air Treating System Composed of Two Alternatively-operating UV/photo-Catalytic Reactors and Evaluation of Its Characteristics," Korean Chem. Eng. Research, 59(4), 574-583(2021).   DOI
2 Arana, J., Dona-Rodriguez, J. M., Gonzalez-Diaz, O., Rendon, E. T., Melian, J. A. H., Colon, G., Navio, J. A. and Peria. J. P., "Gas Phase Ethanol Photocatalytic Degradation Study with TiO2 Doped with Fe, Pd and Cu," Journal of Molecular Catalyst A: Chemical, 215, 153-160(2004).   DOI
3 Saoud, W. A., Assadi, A. A., Guiza, M., Bouzaza, A., Aboussaoud, W., Ouederni, A., Soutrel, I., Wolbert, D. and Rtimi, S., "Study of Synergetic Effect, Catalytic Poisoning and Regeneration Using Dielectric Barrier Discharge and Photocatalysis in a Continuous Reactor: Abatement of Pollutants in Air Mixture System," Applied Catalysis B: Environmental, 213, 53-61(2017).   DOI
4 Medina-Valtierra, J., Garcia-Servin, J., Fausto-Reyes, C. and Calixto, S., "The Photocatalytic Application and Regeneration of Anatase Thin Films with Embeded Commercial TiO2 Particles Deposited on Glass Microrods," Applied Surface Science, 252, 3600-3608 (2006).   DOI
5 Vikrant, K., Kim, K.-H. and Deep, A., "Photocatalytic Mineralization of Hydrogen Sulfide as a Dual-phase Technique for Hydrogen Production and Environmental Remediation," Applied Catalysis B: Environmental, 259, 118025(2019).   DOI
6 Zhang, Z., Long, J., Xie, X., Zhuang, H., Zhou, Y., Lin, H., Yuan, R., Dai, W., Ding, Z., Wang, X. and Fu, X., "Controlling the Synergistic Effect of Oxygen Vacancies and N Dopants to Enhance Photocatalytic Activity of N-doped TiO2 by H2 Reduction," Applied Catalysis A: General, 425-426, 117-124(2012).   DOI
7 Ingo, G. M., Riccucci, C., Bultrini, G., Dire, S. and Chiozzini, G., "Thermal and Microchemical Characterisation of Sol-Gel SiO2, TiO2 and xSiO2-(1-x)TiO2 Ceramic Materials, Journal of Thermal Analysis and Calorimetry, 66, 37-46(2001).   DOI
8 Praserthdam, S., Rittiruam, M., Maungthong, K., Saelee, T., Siriwimol Somdee, S., and Praserthdam, P., "Performance Controlled Via Surface Oxygen-vacancy in Ti-based Oxide Catalyst During Methyl Oleate Epoxidation," Scientific Reports, 10, 18952 (2020).   DOI
9 Wang, Z. and Wang, L., "Role of Oxygen Vacancy in Metal Oxide Based Photoelectrochemical Water Splitting," EcoMat, 3, e12075 (2021).
10 Mamaghani, A. H., Haghighat, F. and Lee, C. S., "Gas Phase Adsorption of Volatile Organic Compounds Onto Titanium Dioxide Photocatalysts," Chem. Eng. J. 337, 60-73(2018).   DOI
11 Hao, L., Miyazawac, K., Hiroyuki Yoshidad, H. and Lu, Y., "Visible-light-driven Oxygen Vacancies and Ti3+ co-doped TiO2 Coatings Prepared by Mechanical Coating and Carbon Reduction," Materials Research Bulletin, 97, 13-18(2018).   DOI
12 Liqiang, J., Baifu, X., Fulong, Y., Baiqi, W., Keying, S., Weimin, C. and Honggang, F., "Deactivation and Regeneration of ZnO and TiO2 Nanoparticles in the Gas Phase Photocatalytic Oxidation of n-C7H16 or SO2", Applied Catalysis A: General, 275, 49-54(2004).   DOI
13 Cao, L., Gao, Z., Suib, S. L., Obee, T. N., Hay, S. O. and Freihaut, J. D., "Photocatalytic Oxidation of Toluene on Nanoscale TiO2 Catalysis: Studies of Deactivation and Regeneration," Journal of Catalysis, 196, 253-261(2000).   DOI
14 Dupin, J.-C.,Gonbeau, D., Vinatierb, P. and Levasseurb, A., "Systematic XPS Studies of Metal Oxides, Hydroxides and Peroxides," Phys. Chem. Chem. Phys., 2, 1319-1324(2000).   DOI
15 Vorontsov, A. V., Savinov, E. N., Lion, C. and Smirniotis, P. G., "TiO2 Reactivation in Photocatalytic Destruction of Gaseous Diethyl Sulfide in a Coil Reactor," Applied Catalysis B: Environmental, 44, 25-40(2003).   DOI
16 Vorontsov, A. V. and Dubovitskaya, V. P., "Selectivity of Photocatalytic Oxidation of Gaseous Ethanol over Pure and Modified TiO2", Journal of Catalyst, 221, 102-109(2004).   DOI
17 Yang, W., Su, Z., Xu, Z., Yang, W., Peng, Y. and Li, J., "Comparative Study of α-, β-, γ- and δ-MnO2 on Toluene Oxidation: Oxygen Vacancies and Reaction Intermediates," Applied Catalysis B: Environmental, 260, 118150(2020).   DOI
18 Chen, X. F., Wang, X. C., Hou, Y. D., Huang, J. H., Wu, L. and Fu, X. Z., "The Effect of Postnitridation Annealing on the Surface Property and Photocatalytic Performance of N-doped TiO2 Under Visible Light Irradiation," Journal of Catalyst, 255, 59-67 (2008).   DOI
19 Corby, S., Franc'as, L., Kafizas, A. and Durrant, J. R., "Determining the Role of Oxygen Vacancies in the Photoelectrocatalytic Performance of WO3 for Water Oxidation," Chem. Sci., 11, 2907-2914(2020).   DOI
20 Chang, C. P., Chen, J. N., Lu, M. C. and Yang, H. Y., "Photocatalytic Oxidation of Gaseous DMF Using Thin Film TiO2 Photocatalyst," Chemosphere, 58, 1071-1078(2005).   DOI