We both know that ferric oxide will react with h2s and could be regenerated by air.Are there any methods onstream to regenerate the spent oxide to original status?For example,how about introducing H2O2 solution or ammonia into the ferric oxide before desulfurization in vessels,since we know the decompostion of H2O2 will produce oxygen.Could this method work efficiently?

It might be possible to get this to work, but I'd give some serious thought to the risk of generating a mixture of oxygen and gas.