45.荷重可変針入度法による石炭軟化固化過程の粘度変化測定

概要

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A needle penetronietry was performed with steady force to pelletized coal upon heating via a cylindrical needle. From the effects of shear rate on apparent viscosity of the softening pellet, defined as the shear-rate to shear-stress ratio, it was found that the pellet behaved as a Newtonian fluid for shear rates lower than a critical one while as a pseudo-plastic fluid for higher shear rates. The penetrometry was then carried out varying the force with time. The variable force loading enabled to maintain the shear rate well below the critical one and thereby to measure the apparent viscosity of the pellet as a Newtonian fluid. Upon heating at a rate of 10 K・min^<-1>, the apparent viscosities of pellets of Goonyella and Blind Canyon coals varied at 600-800K in ranges of 10^<10>-10^4 and 10^<10>-10^6 Ps・s^<-1>, respectively.
一般社団法人日本エネルギー学会の論文
2002-10-29