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首页> 外文期刊>Separation and Purification Technology >Conversion characteristics and kinetic analysis of gaseous α-pinene degraded by a VUV light in various reaction media
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Conversion characteristics and kinetic analysis of gaseous α-pinene degraded by a VUV light in various reaction media

机译：VUV光在各种反应介质中降解的气态α-pine烯的转化特性和动力学分析

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摘要

The photodegradation of gaseous α-pinene by a vacuum ultraviolet (VUV) light was investigated under different process parameters and reaction media. The degradation of α-pinene was examined at nominal concentrations ranging from 50 to 1000 ppm, and resulted from the combination of direct photolysis, OH· oxidation and O3 oxidation, in which O3 oxidation played a dominant role. A high conversion efficiency of α-pinene was achieved at a moderate relative humidity (RH) of 35-40% with an efficient utilization of the electrical energy. The conversion of α-pinene were remarkably reduced while a RH was increased to 75-80% since a higher RH inhibited the production of ozone and further affected the conversion of α-pinene adversely. The α-pinene conversion followed the first-order kinetic model at the low initial concentrations (50-200 ppm), and the second-order kinetic model provided a good fit to the data at the high concentrations (400-1000 ppm). The kinetic models including the initial target concentrations and the produced ozone amounts were developed to describe their mutual relationships. Preliminary results indicate that the VUV photooxidation was an appropriate technology for conversion of α-pinene not only as a single treatment but also as a pretreatment followed by the subsequent biodegradation.
机译：在不同的工艺参数和反应介质下，研究了真空紫外线（VUV）对气态α-pine烯的光降解作用。在标称浓度为50至1000 ppm的范围内检查了α-pine烯的降解，这是直接光解，OH·氧化和O3氧化的组合所致，其中O3氧化起主要作用。在35-40％的相对湿度（RH）的情况下，可以高效利用电能，从而实现高α-pine烯转化效率。 α-pine烯的转化率显着降低，而RH增加到75-80％，因为较高的RH会抑制臭氧的产生并进一步不利地影响α--烯的转化。在低初始浓度（50-200 ppm）下，α-pine烯转化遵循一阶动力学模型，而在高浓度（400-1000 ppm）下，二阶动力学模型很好地拟合了数据。建立了包括初始目标浓度和产生的臭氧量在内的动力学模型，以描述它们之间的相互关系。初步结果表明，VUV光氧化不仅是单次处理，而且是预处理，然后进行后续生物降解的技术，都是转化α-pine烯的合适技术。

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