煤炭直接液化油品加氢稳定和加氢改质的试验研究

对神华上湾煤直接液化油品进行了加氢稳定和加氢改质的试验研究。煤液化重油经过加氢稳定处理后，可以生产出煤液化需要的供氢溶剂；煤液化轻油经过加氢稳定处理后，中间馏分油的十六烷值低、密度高，还需进一步加工。加氢改质是一种有效改善油品质量的方法。结果表明，加氢改质后小于150 ℃石脑油馏分是很好的催化重整原料，大于150 ℃柴油馏分性质满足环烷基原油生产的轻柴油国家标准；加氢改质柴油馏分对十六烷值改进剂具有良好的感受性，添加1 000 g/g的十六烷值改进剂可以生产出满足欧Ⅱ排放标准的柴油产品。

STUDY ON THE HYDROGENATION AND HYDRO-UPGRADING OF OIL PRODUCT FROM DIRECT COAL LIQUEFACTION PROCESS

Pilot plant test study on both hydrogenation and hydro-upgrading of oil from direct coal liquefaction (DCL) process was carried out. It was showed that by hydrogenation the heavy fraction from DCL consisted of about 20% of partially saturated aromatics, thus it could be used as H-donor solvent for DCL process. The middle distillates of the light fraction from DCL had the characteristics of low cetane number and high density, which needed to be further upgraded. Test results showed that after hydro-upgrading the naphtha fraction (<150℃) was a good feedstock for catalytic reforming process due to its low sulfur and nitrogen contents; the qualities of the middle distillate fraction (>150℃) could meet the requirements of light diesel fuel National Standard (produced from naphthenic base crude). In addition, the hydro-upgraded diesel distillate had good sensibility to cetane improvement additives. With the addition of 1 000 ppm cetane improver this hydro-upgraded diesel distillate could meet the specification of diesel fuel for satisfying Europe II exhaust standard.