The photodegradation kinetics of aqueous sodium oxalate solution using TiO2 catalyst

1998 ◽  
Vol 175 (1-2) ◽  
pp. 221-235 ◽  
Author(s):  
Jimmy Bangun ◽  
Adesoji A. Adesina
Keyword(s):  
Sodium Oxalate ◽  
Aqueous Sodium ◽  
Tio2 Catalyst ◽  
Oxalate Solution ◽  
Kinetics Of

EUROPIUM OXALATE ION ASSOCIATION IN WATER

1966 ◽  
Vol 44 (24) ◽  
pp. 3057-3062 ◽  
Author(s):  
P. G. Manning
Keyword(s):  
Acetic Acid ◽  
Ionic Strength ◽  
Stability Constant ◽  
Stability Constants ◽  
Aqueous Phase ◽  
Sodium Acetate ◽  
Ion Association ◽  
Sodium Oxalate ◽  
Aqueous Sodium ◽  
Oxalate Ion

The partitioning of radiotracer 152/151Eu between aqueous sodium oxalate (Na2L) solutions and toluene solutions of thenoyltrifluoroacetone (HTTA) has been studied as a function of the oxalate concentration. The pH of the aqueous phase was controlled by means of sodium acetate – acetic acid mixtures and the ionic strength (I) by NaCl or NaClO4.At low ionic strengths (~0.05) and [L] ~10−4 M EuL+ formed, but at I = 0.95 and [L] ~10−3 M EuL2− also formed. Stability constants for the 1:1 and 1:2 (metal:ligand) complexes are reported.The magnitudes of the stepwise stability constant ratios are discussed.

Kinetics of Hg° oxidation over a V2O5/MoO3/TiO2 catalyst: Experimental and modelling study under DeNOX inactive conditions

2016 ◽  
Vol 193 ◽  
pp. 121-132 ◽  
Author(s):  
Nicola Usberti ◽  
Silvia Alcove Clave ◽  
Michael Nash ◽  
Alessandra Beretta
Keyword(s):  
Tio2 Catalyst ◽  
Kinetics Of ◽  
Modelling Study

The retroaldol reaction of 3-methyl-2-butenal

1983 ◽  
Vol 61 (1) ◽  
pp. 171-178 ◽  
Author(s):  
J. Peter Guthrie ◽  
Brian A. Dawson
Keyword(s):  
Sodium Hydroxide ◽  
Equilibrium Constant ◽  
Rate Constants ◽  
Equilibrium Constants ◽  
Aqueous Sodium Hydroxide ◽  
Initial Increase ◽  
Aqueous Sodium ◽  
Rate Determining Step ◽  
Kinetics Of

In aqueous sodium hydroxide solutions at 25 °C, 3-methyl-2-butenal, 1c, undergoes retroaldol cleavage to acetone and acetaldehyde. The kinetics of the retroaldol reaction were followed spectrophotometrically at 242 nm and showed simple first order behavior. When 3-methyl-3-hydroxybutanal, 2c, was added to aqueous sodium hydroxide solutions at 25 °C, there was an initial increase in absorbance at 242 nm, attributed to formation of 1c, followed by a 20-fold slower decrease; the rate of the slow decrease matches the rate of disappearance of 1c under the same conditions. Analysis of the kinetics allows determination of the three rate constants needed to describe the system: khyd = 0.00342; kdehyd = 0.00832; kretro = 0.0564; all M−1 s−1. The equilibrium constant for enone hydration is 0.41. Rate constants for the analogous reactions for acrolein and crotonaldehyde could be obtained from the literature. There is a reasonable rate–equilibrium correlation for the retroaldol step. For the enone hydration step, rate and equilibrium constants respond differently to replacement of hydrogen by methyl. It is proposed that this results from release of strain after the rate-determining step by rotation about a single bond; this decrease in strain is reflected in the equilibrium constant but not in the rate constant.

Kinetics of photodegradation of alizarin green in an acoustic fluidized bed using TiO2 catalyst

2016 ◽  
Vol 38 (4) ◽  
pp. 207-212 ◽  
Author(s):  
C. Si ◽  
J. Zhou ◽  
Y. Sun ◽  
G. Liu ◽  
H. Gao
Keyword(s):  
Fluidized Bed ◽  
Tio2 Catalyst ◽  
Kinetics Of

scholarly journals Addition of Hydrogen Sulfite to Bicyclo[2.2.1]heptenes. I. Kinetics of Some 2-Norbornenols and 2-Norbornenylmethanols in Aqueous Sodium Hydrogen Sulfite Solutions.

1976 ◽  
Vol 30a ◽  
pp. 358-362 ◽  
Author(s):  
Martti Lajunen ◽  
Katriina Lehtonen ◽  
Fred Karlsson ◽  
Shneior Lifson ◽  
Jouko Koskikallio
Keyword(s):  
Aqueous Sodium ◽  
Sodium Hydrogen ◽  
Kinetics Of
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