리기다소나무 목분의 열화학적 전환에 의한 직접액화 ( II ) - 황산알루미늄 촉매와 탄산나트륨 촉매에 의한 전가수분해 목분에 대하여 - ( Thermochemical Direct Liquefaction of Prehydrolyzed Pitch Pine , Pinus rigida Miller , Wood Meals ( II ) - For Prehydrolyzed Wood Meals by Aluminum Sulfate Catalyst and Sodium Carbonate Catalyst - )