1Department of Chemistry, Govt. P.G. College, Jhalawar-326001, Rajasthan (India)
2Department of Chemistry, S.P.C. Govt. College, Ajmer-305001, Rajasthan (India)
In this paper we report that isoamyl alcohol and aniline are good inhibitor for SO2 oxidation in pH range 4.02–5.25 in the presence of Ag(I). Based on the observed results following rate law given and a free radical mechanism has been proposed.
d[S(lV)]/dt = (k1+ k2[Ag(I)]) [S(lV)]/1 + B [Organics]
Experiments were carried out at 30≤T°C≤40, 4.02≤pH≤5.25, 1×10−3 mol/cm3 ≤ [S(lV)≤10×10−3 mol/cm, 5×10−6 mol/cm3 ≤[Ag(I)]≤2.5×10−5 mol/cm3, 5×10−7 mol/cm3≤[Isoamyl alcohol]≤8×10−3 mol/cm,5×10−7 mol/cm3 ≤[Aniline]≤3× 10−4 mol/cm3. Rate constants and order of reaction were calculated and found pseudo- first order in all cases. The effect of pH and temperature were also discussed. The value of apparent energy were found as 45.16 kJ mol−1 and 26.43 kJ mol−1 in the presence of isoamyl alcohol and aniline respectively.
Kinetics, Autoxidation, SO2, Ag(I), Catalysis, Inhibition, Isoamyl alcohol, Aniline
