水溶液
超临界流体
化学
原位
分析化学(期刊)
化学工程
材料科学
色谱法
有机化学
工程类
作者
Kan Ding,William E. Seyfried
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:1996-06-14
卷期号:272 (5268): 1634-1636
被引量:63
标识
DOI:10.1126/science.272.5268.1634
摘要
The pH of concentrated NaCl-HCl fluids (0.57 mole of NaCl per kilogram of water) has been measured at supercritical conditions of water with a yttria-stabilized zirconia sensor in a titanium flow reactor. At 400°C and 40 megapascals, the in situ pH of the fluids, ranging from 3.3 to 6.2, differs greatly from its original value of 1.9 to 7.6 at ambient conditions. The measurements agree well with theoretical predictions, showing strong associations of HCl° and NaOH° complexes in high-temperature fluids. The pH sensor provides a powerful tool to investigate unambiguously the distribution of species in aqueous fluids at elevated temperatures and pressures.
科研通智能强力驱动
Strongly Powered by AbleSci AI