Ozonation of Acid Red 14 in the Presence of Inorganic Salts in a Microporous Tube-in-Tube Microchannel Reactor

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• 作者：Baochang Sun ; Meiping Gao ; Moses Arowo ; Jiexin Wang ; Jianfeng Chen ; Hong Meng ; Lei Shao
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：December 10, 2014
• 年：2014
• 卷：53
• 期：49
• 页码：19071-19076
• 全文大小：299K
• ISSN：1520-5045

文摘

This study was conducted to investigate the effect of inorganic salts on the mass-transfer coefficient of O₃ and decolorization of azo dye (Acid Red 14, AR14) solution through ozonation in a microporous tube-in-tube microchannel reactor (MTMCR). The overall volumetric mass-transfer coefficient (K_Ga) of O₃ in the MTMCR was deduced by material balance. The effects of different salts on the K_Ga of O₃ and decolorization efficiency of the AR14 solution were studied, and results show that both were significantly affected by the inorganic salts. Although the K_Ga of O₃ and the decolorization efficiency of AR14 increased with increasing salt concentration and pH, the effect of NaNO₃ was much weaker than that of NaCl, Na₂SO₄, Na₂CO₃, and NaHCO₃. The enhanced K_Ga of O₃ and decolorization could be due to the generation of species with high oxidizing ability in the presence of the salts.