For reactor design, many different balances (material, energy...) take place and require analytical or numerical techniques. In this study, an approach to the understanding of an electrochemical reactor is developed similar to that considered for the case of a chemical reactor. Both mass transfer and current density equations connecting the different species in solution, form a system of three differential equations. The numerical resolution is proposed in two examples:
- The copper recovery in sulfuric acid medium with a axial field reactor working in diffusion kinetic.
- The electrodissolution of iron in water with a radial field reactor working in activation kinetic.
M. Benzina, A. Ratel, A. Bellagi, G. Lacoste
Sunlight is used instead of a medium-pressure mercury lamp to perform the oxidative photocyclisation of the diarylethylene I to the pentahelicene II ; the chemical yield is the same as for the UV induced reaction.
A. M'henni, B. Ben Hassine, M. Gorsane
An isoperibol calorimeter is described ; and the device has been tested with the dissolution of [Tri (methyl hydroxy) amino methane] in HCl 0,1 M/Kg solution. Test reaction gave ΔH = 30,07 KJ mol. The results obtained with this device for the βT.C.P. dissolution in HNO3 55 Wt % lead to ΔH = -154,89 ± 0,33 KJ.mol.
A. Ben Cherifa, B. Omezzine, M. Jemal
The adsorption isotherms have been studied by different authors and recent works based on thermodynamic considerations have been published. This article is a review of the different models proposed in literature.
M. Dhahbi (ex. Hamdi)