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Change of physical properties with the slurry-phase hydrocracking reaction of vacuum residue
Journal of Industrial and Engineering Chemistry ( IF 6.1 ) Pub Date : 2021-03-23 , DOI: 10.1016/j.jiec.2021.03.022
Suk Hyun Lim , Kang Seok Go , Eun Hee Kwon , Hai Hung Pham , Nam Sun Nho , Kwang Ho Kim , Jae Goo Lee , Sung-youl Park

The physical properties (density, kinematic viscosity, surface tension, and hydrogen solubility) and their correlations for a slurry-phase hydrocracking reaction were investigated with a vacuum residue (VR, as a feedstock) and hydrocracked products from VR conversion of 32.3%, 73.9% at different temperature and pressure conditions. As a result, the density, kinematic viscosity, and surface tension of the product decreased with converting VR, while the solubility of hydrogen increased. And the dependence of product properties on temperature showed to be similar to feedstock. Based on the measured data, the empirical correlations that can predict from VR to products were obtained with R-square of 0.9930 by modifying the existing correlations. From these properties change, it was confirmed that the hydrocracking temperature and the degree of the hydrocracking conversion of VR is the most dominant parameters to govern the change of physical properties. Finally, it was found that the mass transfer rate of hydrogen into oil is important because the hydrogen solubility (0.8 mol H2/kg feed or 0.16 wt.% on the feed weight at 160 bar, 410 ℃) on the liquid phase is much smaller than the chemical consumption of hydrogen (about 2–3 wt.% on the feed weight) for near full conversion of VR.



中文翻译:

真空渣油的浆相加氢裂化反应物理性质的变化

使用真空残渣(VR,作为原料)和VR转化率分别为32.3%,73.9的加氢裂化产物,研究了淤浆相加氢裂化反应的物理性质(密度,运动粘度,表面张力和氢溶解度)及其相关性%在不同的温度和压力条件下。结果,随着转换VR,产物的密度,运动粘度和表面张力降低,而氢的溶解度增加。产品性能对温度的依赖性与原料相似。根据测得的数据,通过修改现有的相关性,可以得出从VR到产品的经验相关性,R平方为0.9930。由于这些属性的变化,证实了VR的加氢裂化温度和加氢裂化转化度是控制物理性质变化的最主要参数。最后,发现氢到油中的传质速率很重要,因为氢的溶解度(0.8 mol H 2 / kg进料或液相中 进料重量(在160  bar,410  ℃时为进料重量的0.16 wt。%)比氢气的化学消耗量( 进料重量的约2–3 wt。%)小得多VR的完全转换。

更新日期:2021-04-26
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