Kinetics and reaction pathways of pyridine oxidation in supercritical water

Reactions at supercritical conditions: Applications and fundamentals

“…For both phenol and chlorophenol, a significant fraction (about 50%) of the phenolic compound reacted to form dimers. Crain et al (1993) ucts from the oxidation of pyridine in SC water. These products included amines, amides, and carboxylic acids.…”

“…Global kinetics. There have been several kinetics studies of the SCWO of individual compounds Tester, 1987, 1988;Tester, 1989, 1991;Yang and Eckert, 1988;Rofer andStreit, 1988, 1989;Thornton and Savage, 1990;Lee et a]., 1990;Webley et al, 1990Webley et al, , 1991Jin et al, 1990Jin et al, , 1992Holgate and Tester, 1993;Holgate et al, 1992;Tester et al, 1992;Thornton and Savage, 1992b;Lee and Gloyna, 1992;Li et al, , 1993Crain et al, 1993;Chang et al, 1993;Savage et al, 1994a;Holgate and Tester, 1994a,b). Most of these have focused on the kinetics of the disappearance of the organic compound, but some have also considered the kinetics of the conversion of organic carbon to CO, .…”

Catalytic oxidation of pyridine on the supported copper catalysts in the presence of excess oxygen

“…Crain et al [6] reported the catalytic supercritical water oxidation of pyridine in the temperature range of 425-527 • C, in which the conversion of pyridine increased from 0.03 (at 426 • C) to 0.68 (a.u.) (at 527 • C) at a residence time of 10 s. During the CSCWO of pyridine, ammonia, dimethylamine, and several carboxylic acids such as formic acid, acetic acid, glutaconic acid, and oxalic acid could be detected.…”

Wet hydrogen peroxide oxidation of synthetic pharmaceutical wastewater as a pretreatment method

“…In these AOPs treatment methods, the generation of sufficient reactive species such as hydroxyl radicals (•OH) leads to the effective decomposition of organic pollutants [6,7] . Wet oxidation has shown its effectiveness and promising property with several industrial effluents, including benzene, biphenyls, amines and pyridine [8][9][10][11] .This process performed the liquid-phase oxidation of toxic or poorly biodegradable compounds under high temperature (150~350 °C) and pressure (2.0~15.0 MPa) conditions, using a gaseous source of oxygen or air. During this process, the pollutants were oxidized completely [12,13] .…”