The influence of pH on gas-liquid mass transfer in non-Newtonian fluids

Chemical Industry and Chemical Engineering Quarterly

Fan Jungeng¹  Xu Shuang¹  Li Rundong¹  Luan Jingde¹  Li Shaobai¹ 

[1] Shenyang Aerospace University, College of Energy and Environment and Liaoning Key Laboratory of Clean Energy, Shenyang, China;

关键词: bubble swarms;    Xanthan gum solution;    non-Newtonian fluids;    pH;    mass transfer;   

DOI  :  10.2298/CICEQ160705046L

来源: DOAJ

【 摘 要 】

In this study, the effect of pH on the mass transfer of oxygen bubble swarms in non-Newtonian fluids was experimentally studied. The volumetric liquid side mass transfer coefficient (kLa), liquid side mass transfer coefficient (kL), and specific interfacial area (a) were investigated. The pH was regulated by the addition of hydrochloric acid and sodium hydroxide (NaOH). It was found that the kLa increased with the gas flow rate increasing and decreased with the apparent viscosity of the liquid increasing. In the case of pH < 7, a marginal effect of pH on the gas–liquid mass transfer was observed, but when pH value was higher than 7, mass transfer was promoted with the increase of pH value. Via investigating the impact of pH on kL and a, the variation of mass transfer at pH > 7 was attributed to the decomposition of the Xanthan molecular structure by the hydroxyl of NaOH.

【 授权许可】

Unknown