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Journal of Current Science and Technology

ISSN 2630-0656 (Online)

Regeneration of Co3O4–CeO2 catalyst used for odor elimination in an offset-printing factory

  • Kenichiro Inoue, Tokyo Metropolitan Industrial Technology Research Institute, Tokyo, Japan
  • Shoichi Somekawa, Tokyo Metropolitan Industrial Technology Research Institute, Tokyo, Japan, Corresponding author; Email:
  • Tsutomu Shinoda, Sankyo Kousan Co., Ltd., 12-3, Kawasaki-city, Kanagawa, Japan
  • Hiroyuki Fujiwara, Sankyo Kousan Co., Ltd., 12-3, Kawasaki-city, Kanagawa, Japan
  • Yoshimasa Kawami, Sankyo Kousan Co., Ltd., 12-3, Kawasaki-city, Kanagawa, Japan


          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 oC (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 oC; 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.

Keywords: Co3O4-CeO2 catalyst; offset printing factory; Pt/Al2O3 catalyst; odor elimination; recovery of catalyst activity; sulfur

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DOI: 10.14456/jcst.2018.6


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