G. M. Peerzada

Effect of Temperature on Oscillatory Behaviour of the System Containing Isomers of Hydroxybenzoic Acid in Batch Reactor

In the present paper a thorough study of temperature dependence on oscillatory behaviour of the Belousov-Zhabotinsky (BZ) system containing the isomers of hydroxybenzoic acids

Synthesis and characterization of a thermo-responsive polymer, poly-NIPAAm-co-ferroin: Perturbation on dynamical regime and stability in an oscillatory chemical reaction

Thermal and chemical flooding are good alternatives to recover heavy oil. Polymer flooding procedure is one of the most important enhanced oil recovery (EOR) methodologies which improve the mobility ratio of water and oil. Adding polymer in water flooding method which involves the addition of soluble polymers in water before being injected into the reservoir, increases water viscosity even by adding a small amount of these materials. It, too, reduces the swept zone permeability and allows an increase in the vertical and areal sweep efficiency of the water injection. In this study, Polymers containing compounds of long chain such as polyacrylamide, polysaccharides, etc. leads to increase the oil movement ratio to water movement ratio. Another effect of this injection in to the reservoir is blocking the routes which have higher permeability by passing the time. As a result the water passes through these pathways are being blocked. Consequently new directions caused to increase recovery factor in the reservoir. Therefore, by increasing shear stress regarding the oil movement, the mobility will be increased.

Effect of Manganese Salts on an Oscillatory Chemical Reaction in Different Acid Media

Studies on the oscillatory behavior of resorcinol with different catalysts, different co-ions for the same catalyst (acetate, carbonate, sulphate) and different media give different trends. The use of different catalysts shows that Mn(II) is most reactive and Ferroin is least reactive with respect to resorcinol with respect to different oscillatory parameters like time period and induction period. The use of different acidic media clearly shows the ease with which protonated species is formed in sulfuric acid and hence maximum number of oscillations is seen in this medium as compared to orthophosphoric acid where no oscillations are seen. Study on the different co-ions is carried out for the first time and it is observed that co-ions also have a good impact on nature of oscillations. Such ions can be treated as co-substrates although oscillations are not observed while using such compound separately with the bromate (i.e. in absence of resorcinol).

Oscillatory behaviour of resorcinol with manganese salts in different aqueous acid media

Studies on the oscillatory behavior of resorcinol with different catalysts, different co-ions for the same catalyst (acetate, carbonate, sulphate) and different media give different trends. The use of different catalysts shows that Mn(II) is most reactive and Ferroin is least reactive with respect to resorcinol with respect to different oscillatory parameters like time period and induction period. The use of different acidic media clearly shows the ease with which protonated species is formed in sulfuric acid and hence maximum number of oscillations is seen in this medium as compared to orthophosphoric acid where no oscillations are seen. Study on the different co-ions is carried out for the first time and it is observed that co-ions also have a good impact on nature of oscillations. Such ions can be treated as co-substrates although oscillations are not observed while using such compound separately with the bromate (i.e. in absence of resorcinol).

Effect of Position and Number of Hydroxyl Groups on the Oscillatory Behaviour of Isomers of Hydroxybenzoic Acid

In the present communication, the effect of isomers of hydroxybenzoic acids with respect to their oscillatory behaviour as organic substrates with inorganic bromate and manganese(II) ion as catalyst in aqueous acid medium (1.0 M H2SO4) have been studied. The number and the relative position of hydroxyl groups (-OH) in the aromatic ring is found to influence the oscillatory behaviour. Besides, the role of bromination reaction and the formation of corresponding bromoderivative is found to be an important step. The experimental findings are within the purview of Field, Koros and Noyes (FKN) mechanism.