Adsorption and photocatalytic decomposition of odor compounds containing sulfur using TiO2/SiO2 bead

✍ Scribed by Harumitsu Nishikawa; Yasumitsu Takahara

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 91 KB
• Volume: 172
• Category: Article
• ISSN: 1381-1169
• DOI: 10.1016/s1381-1169(01)00124-8

✦ Synopsis

Adsorption and photocatalytic decomposition of dimethyl sulfide (DMS) and dimethyl disulfide (DMDS) using an improved type of silica bead inner-supported with TiO 2 (TiO 2 /SiO 2 ) were investigated. The specific surface area of the TiO 2 /SiO 2 bead was 321 m 2 g -1 and the adsorption capacity of the bead for DMS or DMDS was 49.9, 116 g g -1 , respectively. Photocatalytic decomposition of DMS using the bead was about 100% at the space velocities of 33.5-134 h -1 after the equilibrium between adsorption and desorption of the compound, whereas, that of DMS using surface-supported TiO 2 /SiO 2 was below 65% at the same conditions as described in previous paper. Though photocatalytic decomposition of DMDS using the inner-supported bead was below 53% for the same condition as DMS, the removal of DMDS in the lighting up condition from the start using the bead was about 100% for 50 h at a space velocity of 67 h -1 . It was suggested that DMDS was treated completely by the composite effects of adsorption and photocatalytic decomposition.