The decomposition of sodium chlorite was studied in a well‐stirred reactor in a pH range of 2—3 and a temperature range of 15—35°C varying the chlorite concentration. The reaction rate was evaluated by analyzing the consumption of chlorite iodometrically. The rate law was established. Reaction was found to be of the first order with respect to both chlorite and acid concentration. Temperature dependence of the reaction was also studied and pre‐exponential Arrehenius parameter and activation energy were determined. The optimum conditions to generate chlorine dioxide from sodium chlorite are also highlighted.
− In this study, by using the polymeric membrane separation process, the CO 2 /CH 4 separation and H 2 S removal from biogas were performed in order to CH 4 purification and enrichment for the fuel cell energy source application. Fibers were spun by dry/wet phase inversion method. The module was manufactured by fabricating fibers after surface coating with silicone elastomer. The scanning electron microscopy(SEM) studies showed that the produced fibers typically had an asymmetric structure; a dense top layer supported by a porous, sponge substructure. The permeance of CO 2 and CO 2 /CH 4 selectivity increased with pressure and temperature. Mixture gas with increasing pressure and temperature, removal efficiency of the CO 2 and H 2 S were decreased while concentration of CH 4 was increased up to 100%. When retentate flow rate was increased with the decreasing of pressure and temperature the CH 4 recovery ratio in retentate side was increased while the CH 4 purity in retentate side was decreased.
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