神华煤液化油窄馏分假临界性质的研究(Ⅰ)假临界温度

PSEUDO-CRITICAL PROPERTIES OF NARROW BOILING-RANGE FRACTIONS FROM SHENHUA COAL-DERIVED OIL PART Ⅰ PSEUDO-CRITICAL TEMPERATURE

对神华煤进行煤炭直接液化实验,将300℃之前的液化生成油切割成8个窄馏分,利用基团贡献法计算得到窄馏分的假临界温度随蒸馏温度升高而升高,且符合线性方程Tc=435.4+1.298t.采用6种不同关联式计算得到的煤液化油窄馏分的假临界温度与基团贡献法的估算值有较好的一致性,相对误差在5%之内,其中采用Watanasiri关联式和日本NEDO法的相对误差在2%之内.

Shenhua coal-derived oil samples are obtained from the continuous direct coal liquefaction test. 8 narrow fractions are gained by the true boiling point distillation from the sampies, of which boiling point is lower than 300 ℃. The pseudo-critical temperatures （PCT） calculated by group contribution method （GCM） of the narrow fractions ascend with distillation temperature rising with a linear relation： Tc = 435. 4＋1. 298t. The PCT calculated by six different equations accurately is consistent with the measured values by GCM, which the relative errors are within 5 %. Furthermore, the lesser errors can be got by using the Watanasiri equation and NE- DO formula within 2 %.