Ozonation of deciduous wood in the presence of hydrogen peroxide

The kinetic curves of the dependence of ozone specific absorption ( Q r , sp ) upon aspen wood ozonation in the presence and absence of hydrogen peroxide are obtained. It is established that the rate of ozone and Q r, sp absorption increase in the O 3 /H 2 O 2 system. It is demonstrated by ESR, IR, and UV spectroscopy of diffuse reflection that wood ozonation in the O 3 /H 2 O 2 system results in the destruction of lignin aromatic and quinoid structures. The ozonation process in the presence of H 2 O 2 is accompanied by destruction of the carbohydrate component of the lignocarbohydrate complex. We conclude that O 3 /H 2 O 2 can be used in the deep delignification of wood. It is shown that the presence of hydrogen peroxide upon ozonation increases the efficiency of the process, allowing its duration and total ozone consumption to be reduced.