Determination of nitrate photolysis frequency inside flow tube reactor using NO<sub>2</sub> actinometry

Table 2. Values of each reaction rate constant in MCM Model
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Table 2. Values of each reaction rate constant in MCM Model
Reaction Reaction rate constant/s^-1
$N O_{2} + h v \to N O + O$ 6.78 × 10^-3
$O_{2} + O \to O_{3}$ 1.34 × 10^-14
$O_{3} \to O_{2} + O$ 6 × 10^-5
$N O + O_{3} \to N O_{2} + O_{2}$ 1.95 × 10^-14

Table 3. Comparison of the two methods for measuring irradiation intensity of light source

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Table 3. Comparison of the two methods for measuring irradiation intensity of light source

Research technique	NO₂ photolysis method	Nitrate photometric method
Measuring object	Gaseous NO₂	Aqueous nitrate
Experimental light source	A xenon lamp (CEL-S500, 500 W)	A xenon lamp (CEAULIGHT, 300 W)
Measuring media	Gas	Liquid
Principle of method	NO₂ actinometry method	The hydroxyl radical derived from nitrate photolysis was derived by benzoic acid to produce salicylic acid and its quantification was analyzed
Advantages	Avoid aqueous solution and physical configuration effect	Similar simulation of nitrate photolysis process
Source of error	Uncertain correlation between NO₂and HNO₃	Water weakening effect on light and anisotropy of light on different position

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Xinran LIU, Xiaowen SHI, Chen CHEN, Heshan NING, Yiyou PANG, Zixuan HUANG, Jun ZHENG. Determination of nitrate photolysis frequency inside flow tube reactor using NO₂ actinometry[J]. Journal of Atmospheric and Environmental Optics, 2024, 19(6): 636

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Paper Information

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Received: Sep. 28, 2022

Accepted: --

Published Online: Jan. 8, 2025

The Author Email: LIU Xinran (liuxinran0024@163.com)

DOI:10.3969/j.issn.1673-6141.2024.06.003

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Concentration changes of each product before and after photolysis reaction

Table 1. Concentration changes of each product before and after photolysis reaction

Table 2. Values of each reaction rate constant in MCM Model

Table 2. Values of each reaction rate constant in MCM Model

Table 3. Comparison of the two methods for measuring irradiation intensity of light source

Table 3. Comparison of the two methods for measuring irradiation intensity of light source