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首页> 外文期刊>Journal of Hazardous Materials >Decomposition of benzene in air streams by UV/TiO_2 process
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Decomposition of benzene in air streams by UV/TiO_2 process

机译:UV / TiO_2工艺分解空气中的苯

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Photocatalytic decomposition of gaseous benzene at room temperature was studied with a fixed-bed annular reactor using titania as the photocatalyst. The effects of humidity, UV light intensity and benzene concentration on the conversion and mineralization of benzene were presented. Experimental results can be adequately described by using the Langmuir―Hinshelwood (L―H) kinetic model. The concentration distribution of benzene in the annular reactors of various dimensions can be described by combining the reactor design equation with L―H kinetics. Deactivation of catalyst was observed and attributed to the adsorption of reaction intermediates on TiO_2 surface. The deactivated TiO_2 catalyst could be photochemically regenerated by ozone-purging in the presence of humidity.
机译:使用二氧化钛作为光催化剂,在固定床环形反应器中研究了室温下气态苯的光催化分解。提出了湿度,紫外线强度和苯浓度对苯转化和矿化的影响。使用Langmuir-Hinshelwood(L-H)动力学模型可以充分描述实验结果。通过将反应器设计方程与L–H动力学相结合,可以描述各种尺寸的环形反应器中苯的浓度分布。观察到催化剂失活,这归因于反应中间体在TiO_2表面的吸附。失活的TiO_2催化剂可以在有湿气的情况下通过臭氧吹扫进行光化学再生。

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