6.低品位炭からのハイパーコール製造におよぼす炭酸水処理の効果

抄録

In order to obtain high yields of "HyperCoal" (ash-free coal), the effect of CO_2/H_2O pretreatment on the extraction yields for low-rank coals using cost-effective industrial solvents such as CMNO and CQ, was investigated. A remarkable positive effect of CO_2/H_2O pretreatment was found under lower treatment pressures (0.1-0.5MPa); the thermal extraction yields at 360℃ were increased by 7-15%, resulting in the high extraction yields of about 52% and 45% for WY coal and ND coal, respectively. In addition, 4-11% higher extraction yields were obtained for pretreated WY coal with CMNO at lower extraction temperatures (320-360℃), than those for the untreated coals.