<研究論文>窒素ガス吸着挙動から見たスギ樹皮熱分解物の特性

概要

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Japanese cedar CCryplomeriajaponica D. Don) bark was pyrolyzed in a stream of N2 at 573-1273K for 3-12 h under atmospheric pressure. Fibers of the cedar bark that mainly comprisecellulose, hemicellulose and lignin shrunk during heat treatment. However breaking down of thefibers was not observed during the pyrolysis, leading to the formation of fibrous carbon materialsfrom cedar bark. The development of micro porosity was observed for the materials pyrolyzed attemperatures above 773 K. The increase in specific surface area and total pore volume was due tothe selective formation of micro pores which were distributed sharply around 0.32 to 0.4 nm inradius. Analysis of adsorption data by I-plot and a ,-plot methods suggest that the properties ofthe surface of carbonaceous cedar bark pyrolyzed below 873 K are quite different from those oftypical carbon black, while those of cedar bark pyrolyzed at 1073-1273 K are similar to that ofcarbon black. It is indicated that organic moiety and functional groups originated from cedarbark may affect the surface characteristics of pyrolyzed cedar bark under relatively mildconditions.
秋田大学の論文