Influence of alcohol addition on the specific surface area of calcium hydroxide powder prepared from quicklime : -In case of the alcohol-water successive treatment-

摘要

The dioxin from the garbage incineration is one of the serious environmental problems in recentyears. As one of the dioxin preventive methods, there is a method using calcium hydroxideCa(OH), reacting the chlorine in combustion exhaust gas from garbage incineration. In thismethod, the surface area of calcium hydroxide can be considered to play an important role.However, the formation mechanism of surface area in the calcium hydroxide powder generated byreaction from quicklime has not been sufficiently elucidated up to now. In this paper, the increaseof surface area in the present method of direct mixing quicklime with alcohol is experimentally discussed.As the result, the followings were concluded.CD The method using alcohol-water successive treatment proposed in this paper attains largerspecific surface area of calcium hydroxide powder than that obtained from the conventionalmethod reported in the previous paper 7) of reacting quicklime with aqueous solution of alcohol.@ The alcohols with longer alkyl chain can be pointed out to be effective to increase specificsurface area of calcium hydroxide powder.