Influence of organic acid on thermal hazard of hydrogen peroxide

The effect of methanoic acid and acetic acid with hydrogen peroxide on oxidative desulphurization was investigated by accelerating rate calorimeter (ARC) in this paper. Their reaction order n, activation energy E_a and pre-exponential factor A were calculated from these curves before and after modification of instrument constant, i.e. thermal inertia factor of ARC. The adiabatic decomposition parameters obtained show that hydrogen peroxide is of a character, i.e. it can be easily decomposed by adding methanoic acid or acetic acid. The decomposition is the easiest and activation energy lower for adding methanoic acid, which is from 179.34 kJ·mol^-1 to 84.25 kJ·mol^-1 and 68.35 kJ·mol^-1, respectively. The rate of temperature rise is the biggest and the rise of adiabatic temperature the highest, and the decomposition the most intense, and the risk the highest. Finally, the temperature of no return T_NR and self accelerating decomposition temperature T_SADT of hydrogen peroxide with some specific package were calculated by kinetic parameters, which were 312.77 K, 308.23 K respectively. However, in order to control fire or explosion of oxidative desulphurization process, the technological temperature of oil desulphurization should not be larger than their initial decomposition temperature 295.49 K and 324.38 K.