Authors: Olujinmi M. Folarin, Ighodalo C. Eromosele and Catherine O. Eromosele
Scientific Research and Essays Vol. 6(9), pp. 1922-1927, 4 May, 2010
Abstract
Metal soaps of Ximenia americana seed oil (XSO) and Balanites aegyptiaca seed oil (BSO) were prepared by metathesis in aqueous alcohol solution. The thermal stability of the metal. Carboxylates (soaps) was studied thermogravimetrically in the temperature range 50 – 500°C under nitrogen. The thermal stability of the carboxylate & was assessed in terms of temperatures at which various extents of decomposition were attained and weight loss at the initial stage of decomposition. The weight loss for all the metal soaps was less than 10% at temperature up to 2500C. The activation energies at the initial stage of decomposition of the metal carboxylates modelled using Broido’s equation are in the range 6.93 -14.14 kJmor1 for XSO while those of BSO ranged between 15.52 – 28.41 kJmor1. Based on these results, metal soaps of BSO are thermally stable than those of the corresponding XSO soaps. The results suggest potential application of carboxylates of X. ameiicana and B. aegyptiaca seed oils in some industrial applications.