The kinetics of oxidation of aromatics alcohols like benzyl alcohol and 2-methoxybenzyl alcohol to the corresponding aldehydes with ceric ammonium nitrate have been studied spectrophotometrically at λmax=400nm. The reaction was studied at different concentration of substrate. First order kinetics observed with respect to [substrate], [oxidant] and [H+]. The effect of temperature and solvent composition were studied and the activation parameters have been calculated. Based on the experimental results, a probable reaction mechanism was proposed.

The main aim of the present article is to provide fundamental understandings of the need of renewable solar energy in cooling systems and to give useful guidelines regarding different operational parameters of various cooling techniques and the applicability of solar cooling in both in air-conditioning and refrigeration with the improvement of the coefficient of performance. Solar based refrigeration devices are of significance to meet the needs for cooling requirements such as air-conditioning and ice-making and medical or food preservation in remote areas. They are also noiseless, non-corrosive and environmentally friendly. For these reasons the research activities in this sector are still increasing to solve the crucial points that make these systems not yet ready to compete with the well-known conventionally used vapor compression system. There is an increasing interest in the development and use of solar based cooling technologies due to their various economic and impressive environmental benefits, enabling solar energy or waste heat to be used for applications such as district networks and cogeneration plants. Compared to traditional systems this creates new possibilities for utilizing low temperature based naturally available free energy.