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Quantifying Dose Distributions in Photochemical Reactors

总结: Researchers at Purdue University have developed dyed microspheres that can be introduced to the inlet of a photochemical reactor system to monitor the dosage of UV radiation. Microspheres are allowed to pass through the system and then are collected in the "treated water" stream leaving the reactor. The dye on the microspheres undergoes a photochemical change in response to UV irradiation. This reaction leads to the development of a stable fluorescent compound. Therefore, the beads become increasingly fluorescent as the dose of UV radiation increases. Collection of a sufficiently large number of exposed microspheres from the effluent of a system allows quantification of the dose distribution delivered by the system.

技术优势: Measurement of dose distributionCan be used to determine efficiency of reactor

*Background: Ultraviolet (UV) reactors used in treatment operations all deliver a distribution of UV doses to particles that pass through them, where UV dose is defined as the (time) integral of UV intensity history over the period of exposure. The variation in dose delivery within such a system, even when operated under steady-state conditions, is attributable to spatial heterogeneity in the radiation intensity field and the (turbulent) flow field.

*Web Links: Purdue Office of Technology CommercializationPurdueInnovation and EntrepreneurshipErnest Blatchley IIIPurdue Civil Engineering

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