期刊
JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
卷 42, 期 4, 页码 255-258出版社
SOC CHEMICAL ENG JAPAN
DOI: 10.1252/jcej.08we283
关键词
Heat Transfer; Natural Convection; Reaction Front; Atwood Number; Dissolution Rate
Heat transfer and hydrodynamics at the chemical reaction front have been investigated experimentally using a thermochromic liquid crystal sheet. If the chemical reaction occurs, a band region where the temperature, due to the heat of reaction, is higher than the initial temperature appears at the reaction front. Natural convection due to the temperature difference at the reaction front plays an important role in conveying the higher temperature fluid. For the hydrochloric acid (HCl)-sodium hydroxide (NaOH) system, as the frequency of contact between HCl and NaOH due to convection increases with the concentration of ethanol, the temperature beyond the stagnation point becomes higher than that in other areas. On the other hand, for the acetic acid (CH(3)COOH)-NaOH system, the heat transfer depends mainly on the heat of reaction, because the rate of CH(3)COOH dissolution is smaller than that of HCl.
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