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In domestic forest in Japan, it will be more important to utilize thinned cedar and cypress woods which were planted after the World War II, as Kyoto Protocol has provided a guideline to Japan for reducing greenhouse gas emissions up to3.8% from the forests. Although such forest thinning is used partly as chips for papers and materials for various products, some of them are used as energy source for biomass boiler. However, in near future such woods especially softwoods will increase by thinning which may promote utilization of woods for not only energy use. Moreover, from the biomass view point, wood derived products such as charcoals will be one of the good candidates for fixing carbon dioxide as written in appendix of Kyoto Protocol Target Achievement Plan. In this paper, discussion is focused on how we utilize charcoal made from cedar―thinned wood as an additive of paper comparing with that made from seeds in plum liquor plant which can be also waste materials. Cedar―thinned wood obtained university test forest and plum seeds obtained at from plum liquor manufacturer were carbonized by using modified rotary kiln type carbonization equipment at the same temperature set inside the reactor. After carbonization they were milled and their particle distributions were compared. Both powdered charcoals 研 究 報 文 〒113―8657 東京都文京区弥生1―1―1/1―1―1Yayoi, Bunkyo―ku, Tokyo113―8657, Japan E―mail:rxj02422@nifty.com 福井 浩

Characterization of Adsorption of Charcoal from Cedar-thinned Woods as Additives for Paper