Regeneration of Co3O4-CeO2 catalyst used for odor elimination in an offset printing factory
Keywords:Co3O4-CeO2 catalyst, offset printing factory, Pt/Al2O3 catalyst, odor elimination, recovery of catalyst activity, sulfur
Deactivated ball-type Co3O4-CeO2 catalyst used for odor elimination in an offset printing factory for a year was regenerated by soaking in water. The reaction yield of ethyl acetate to carbon dioxide increased, on regeneration, to 98% from 82% (used catalyst) at 350○C (new catalyst: almost 100%). Sulfur was found in the water (eluate) after soaking the deactivated catalyst; and it is suggested that sulfur, which generally works as a catalyst poison, is dissolved in the water, resulting in recovery of catalyst activity. In the case of ball-type Pt/Al2O3 catalyst, little catalyst deactivation was observed after a year of usage at 350○C; and it is considered that, in this case, the blocking of active sites is suppressed, since the sulfur adsorbed on platinum is easily burned and converted into gas.
Assal, Z. E., Ojala, S., Pitkäaho, S., Pirault-Roy, L., Darif, B., Comparot, J.-D., . . . Brahmi, R. (2017). Comparative study on the support properties in the total oxidation of dichloromethane over Pt catalysts. Chemical Engineering Journal, 313, 1010-1022. DOI: 10.1016/j.cej.2016.10.139
Browning, E. (1965). Toxicity and metabolism of industrial solvents. New York, USA: Elsevier Publishing Company.
Darif, B., Ojala, S., Pirault-Roy, L., Bensitel, M., Brahmi, R., & Keiski, R. L. (2016). Study on the catalytic oxidation of DMDS over Pt-Cu catalysts supported on Al2O3, AlSi20 and SiO2. Applied Catalysis. B: Environmental, 181, 24-33.
Kajama, M. N., Shehu, H., Okon, E., Orakwe, I., & Gobina, E. (2016). VOC oxidation in excess of oxygen using flow-through catalytic membrane reactor. International Journal of Hydrogen Energy, 41(37), 16529-16534.
Leclercq, J., Giraud, F., Bianchi, D., Fiaty, K., & Gaillard F. (2014). Novel inductively-heated catalytic system for fast VOCs abatement, application to IPA in air. Applied Catalysis B: Environmental, 146, 131-137. DOI: 10.1016/j.apcatb.2013.03.049
Lund, H. F. (1971). Industrial Pollution Control Handbook. New York, USA: Mcgraw-hill Book Company.
Somekawa, S., & Hagiwara, T. (2015). The effect of Si poisons on Co3O4-CeO2 catalyst: comparison with a Pt/Al2O3 catalyst. Rangsit Journal of Arts and Sciences, 5, 43-48. DOI: 10.14456/rjas.2015.6
Somekawa, S., Hagiwara, T., Fujii, K., Kojima, M., Shinoda, T., Takanabe, K., & Domen, K. (2011). Mineralization of volatile organic compounds (VOCs) over the catalyst CuO-Co3O4-CeO2 and its applications in industrial odor control. Applied Catalysis A: General, 409-410, 209-214. DOI: 10.1016/j.apcata.2011.10.004
Somekawa, S., Yuliati, L., Ishikawa, A., Takanabe, K., & Domen, K. (2010). Simple, low-cost preoaration of high surface area Co3O4-CeO2 catalyst for total decomposition of toluene. Chemistry Letters, 39(1), 26-27. DOI: 10.1246/cl.2010.26
Sun, Y. -M., Sloan, D., Alberas, D. J., Kovar, M., Sun, Z. -J., & White J. M. (1994). SO2 adsorption on Pt(111): HREELS, XPS and UPS study. Surface Science, 319(1-2), 34-44. https://doi.org/10.1016/0039-6028(94)90567-3
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