Acid-Base Behavior in Hydrothermal Processing of Wastes - Final Report

Johnston, K. ; Rossky, P.

Univ. of Texas, Austin, TX (United States)

关键词: Supercritical Water Oxidation;    Waste Processing;    Computerized Simulation;    Oxidation;    32 Energy Conservation, Consumption, And Utilization;   

DOI  :  10.2172/775047
RP-ID  :  DOE/ER/14687
RP-ID  :  FG07-96ER14687
RP-ID  :  775047

美国|英语

来源: UNT Digital Library

【 摘 要 】

A major obstacle to development of hydrothermal oxidation technology has been a lack of scientific knowledge of chemistry in hydrothermal solution above 350 C, particularly acid-base behavior, and transport phenomena, which is needed to understand corrosion, metal-ion complexation, and salt precipitation and recovery. Our objective has been to provide this knowledge with in situ UV-visible spectroscopic measurements and fully molecular computer simulation. Our recent development of relatively stable organic UV-visible pH indicators for supercritical water oxidation offers the opportunity to characterize buffers and to monitor acid-base titrations. These results have important implications for understanding reaction pathways and yields for decomposition of wastes in supercritical water.