OXIDATIVE DECOMPOSITION OF CHLOROBENZENE OVER CALCIUM-DEFICIENT HYDROXYAPATITE

Gaseous chlorobenzene was decomposed into CO and CO2 by the oxidative reaction at 400-500-degrees-C over calcium-deficient hydroxyapatite (DAp) prepared by an aqueous precipitation procedure. Phenol and benzene were not detected after the reaction. Most of the Cl in chlorobenzene was captured as Cl- in DAp by the reaction. On the other hand, the DAp prepared by the hydrolysis of alpha-tricalcium phosphate was inactive for the decomposition of chlorobenzene. The difference in the activity between the two DAp materials was attributed to the difference of their crystallinities.