METHOD AND DEVICE FOR SIMULTANEOUSLY PREPARING CARBIDE AND SACCHARIDE ANHYDRIDE BY PYROLYSIS OF CELLULOSIC SUBSTANCE

PURPOSE:To enable to simultaneously prepare a carbide having a large surface area and a saccharide anhydride in a good yield by heating a cellulosic substance such as wood from the inner portion thereof by the irradiation or microwave. CONSTITUTION:A cellulosic specimen S such as wood blocks, wood chips, bagasse, paper or pulp is received in a thermal decomposition chamber A and subsequently carbonized by the irradiation of microwave (500-6000MHz) form a microwave-generating device W and, if necessary, by the simultaneous use of a heater H. The generated gas and tar are taken out from an output port B while preventing the further progress of the thermal decomposition with a microwave-shielding net D, and introduced into a tar-recovering chamber E to separate the tar containing saccharide anhydrides such as levoglucosan. Volatile components are introduced into a thermally decomposed low boiling point product-recovering chamber I and recovered.