Determination of Carboxylic Acid Dissociation Constants to 350 °C at 23 MPa by Potentiometric pH Measurements
Determination of Carboxylic Acid Dissociation Constants to 350 °C at 23 MPa by Potentiometric pH Measurements
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通过电位 pH 测量测定 23 MPa 至 350 °C 的羧酸解离常数
DOI：
10.1021/je049923q
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发表时间：
2004
影响因子：
--
通讯作者：
K. Arai
中科院分区：
文献类型：
--
作者：
K. Sue;Fumiaki Ouchi;and Kimitaka Minami;K. Arai
在压力平衡氢铂电极上，用流通式电化学电池测定了乙酸、丙酸、丁酸、戊酸和己酸在0.1mol·kg-1 NaCl介质中的离解常数，温度为（19.4 ~ 350.4）°C，压力为23 MPa。由每种酸显示的K值的温度依赖性定性相似。这些值与电位法、量热法和电导率测定的文献值一致。的经验密度模型的平衡常数的温度依赖性的描述被用来关联的数据。
The dissociation constants of aqueous ethanoic, propanoic, butanoic, pentanoic, and hexanoic acids were determined in 0.1 mol·kg-1 NaCl media at temperatures from (19.4 to 350.4) °C and 23 MPa by a flow-through electrochemical cell with a pressure-balanced hydrogen platinum electrode. Temperature dependence of K values shown by each acid were qualitatively similar. The values are consistent with the literature values determined from potentiometry, calorimetry, and electrical conductivity. An empirical density model for the description of the temperature dependence of the equilibrium constants was used to correlate the data.