The dissolved hydrogen, rather than gaseous hydrogen, plays a crucial role in the hydrogenation process. A thorough understanding of hydrogen dissolution is essential for optimizing the hydrogenation process. In this ...The dissolved hydrogen, rather than gaseous hydrogen, plays a crucial role in the hydrogenation process. A thorough understanding of hydrogen dissolution is essential for optimizing the hydrogenation process. In this paper, the dynamic pressure step method was modified to reduce the temperature difference between the hydrogen and solution, from which the hydrogen solubility and volumetric liquid-side mass transfer coefficient (k_(L)a) of the vacuum residue were obtained. It was discovered that temperature was the most critical factor in hydrogen dissolution, simultaneously enhancing both the hydrogen solubility and k_(L)a. Pressure played a significant role in promoting hydrogen solubility, but had a relatively small impact on kLa. Stirring speed, although it enhanced k_(L)a, did not affect hydrogen solubility. By normalizing the dissolution parameter, the results showed that the gas-liquid mass transfer rate decreased continuously during hydrogen dissolution and that the SD-tD curves after normalization were almost the same in all experimental conditions.展开更多
Enriched-aromatics oils,surfactants and a new activator were used as the additi ves. The effects of intensifying distillation on Daqing crude oil were determine d at different concentrations and distillation temperatu...Enriched-aromatics oils,surfactants and a new activator were used as the additi ves. The effects of intensifying distillation on Daqing crude oil were determine d at different concentrations and distillation temperatures by simple distillati on and TBP distillation. The mechanisms of intensifying distillation of crude oi l by using different additives are discussed.The experimental results show that the types of additives, concentrations and distillation temperatures are main fa ctors which affect intensifying distillation of crude oil.The intensifying effe ct of the new activator developed in this work is better than that of the other additives.展开更多
基金supported by the National Key R&D Program of China(No.2022YFB4101300)National Natural Science Foundation of China(NSFC)(No.22278430 and 21878329)Project of R&D Department of CNPC(2020B-2011 and 21-CB-05-05).
文摘The dissolved hydrogen, rather than gaseous hydrogen, plays a crucial role in the hydrogenation process. A thorough understanding of hydrogen dissolution is essential for optimizing the hydrogenation process. In this paper, the dynamic pressure step method was modified to reduce the temperature difference between the hydrogen and solution, from which the hydrogen solubility and volumetric liquid-side mass transfer coefficient (k_(L)a) of the vacuum residue were obtained. It was discovered that temperature was the most critical factor in hydrogen dissolution, simultaneously enhancing both the hydrogen solubility and k_(L)a. Pressure played a significant role in promoting hydrogen solubility, but had a relatively small impact on kLa. Stirring speed, although it enhanced k_(L)a, did not affect hydrogen solubility. By normalizing the dissolution parameter, the results showed that the gas-liquid mass transfer rate decreased continuously during hydrogen dissolution and that the SD-tD curves after normalization were almost the same in all experimental conditions.
基金美国IET教育基金资助项目及石油大学重质油加工国家重点实验室开放基金部分资助项目 (No 2 0 0 0 15 )
文摘Enriched-aromatics oils,surfactants and a new activator were used as the additi ves. The effects of intensifying distillation on Daqing crude oil were determine d at different concentrations and distillation temperatures by simple distillati on and TBP distillation. The mechanisms of intensifying distillation of crude oi l by using different additives are discussed.The experimental results show that the types of additives, concentrations and distillation temperatures are main fa ctors which affect intensifying distillation of crude oil.The intensifying effe ct of the new activator developed in this work is better than that of the other additives.
