Photochemical degradation of crude oil: Comparison between direct irradiation, photocatalysis, and photocatalysis on zeolite

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• 作者：Maurizio D’ ; Auria ; Lucia Emanuele ; Rocco Racioppi ; Vincenzina Velluzzi
• 关键词：Crude oil ; Photodegradation ; Photocatalysis ; Zeolite
• 刊名：Journal of Hazardous Materials
• 出版年：2009
• 出版时间：15 May 2009
• 年：2009
• 卷：164
• 期：1
• 页码：32-38
• 全文大小：700 K

文摘

Direct irradiation for 100 h of crude oil from Basilicata (Southern Italy) gave in the case of linear and branched alkanes a reduction of 9 and 5 % , respectively. On the contrary, cyclic alkanes decreased for 54 % while aromatic hydrocarbons showed a reduction of 37 % . These results are in agreement with a prevalent electron transfer mechanism. Photocatalysis (100 h) gave extensive degradation of crude oil: linear alkanes were degraded for 98.66 % , branched alkanes were reduced for 97.31 % , cyclic alkanes for 96.04 % , while aromatic compounds and alkenes were reduced for 99.54 and 98.38 % , respectively. These results are in agreement with a prevalent hydrogen abstraction mechanism. When photocatalysis is performed in the presence of zeolite linear alkanes were degraded for 79.85 % , branched alkanes were reduced for 45.38 % , cyclic alkanes for 58.10 % , while aromatic compounds were reduced for 91.85 % . In this case, an increase of the relative amount of alkenes (42.05 % ) was observed.