重柴油加氢改质试验研究

The Experimental and Research on the Modification of Heavy Diesel Hydrogenation

以石油基重柴油为原料,采用中国石化石油化工科学研究院(RIPP)研究开发的加氢改质催化剂,在300mL固定床加氢试验装置上进行了加氢改质试验。试验重点考察重柴油加氢改质后作为改善煤直接液化柴油(DDCL)的调和组分以及直接作为柴油产品的可行性。试验结果表明,反应温度对重质柴油加氢改质生成油性质、油品收率及氢耗产生明显影响。生产DDCL调和组分,可以采用320益～350益的反应温度,产物硫氮含量低,十六烷值得到大幅度提高,C4以下低碳烃产率低,油品收率高,氢耗低。若直接生产柴油产品应采用350益～380益的反应温度,产品的密度、馏程、凝点、冷滤点等性质得到改善,但十六烷值的增加幅度降低,润滑性较差,氢耗增加。

The article illustrated the modification experiment of heavy diesel hydrogenation, with petroleum heavy diesel oil as raw material; the hydrogenation modification catalyst developed by Sinopec Research Institute of Petroleum （RIPP） was experimented on the fixed bed of 300ml of hydrogenation experimental devices. The key experimental point is the possibility of DDCL after the hydrogenation modification research, harmonic or separation, or directly as the diesel product for use. The experiment shows that the reaction temperature has an ohvious impact on the oil character, oil production output and hydrogen consumption after the modification of heavy diesel hydrogenation. For the production of DDCL harmonic and separation, the reaction temperature can be 320-350℃, and the proportions of sulfur and nitrogen is low and the cetane number can be greatly improved. However, below C4, the output of light olefins is low; the oil output is high; and the hydrogen consumption is low. When under the reaction temperature of 350 ℃ - 380 ℃, the directly yielded diesel product can be improved in product density, distillation range, pour point and cold filter plugging point, but the cetane number will decrease with poor lubricity and increased hydrogen consumption.