The oversupply of diesel in China necessitates efficient separation of polycyclic aromatic hydrocarbons from fluidized catalytic cracking diesel for value-added utilization.However,purification is hindered by alkane a...The oversupply of diesel in China necessitates efficient separation of polycyclic aromatic hydrocarbons from fluidized catalytic cracking diesel for value-added utilization.However,purification is hindered by alkane and monocyclic aromatic interference.In this work,we propose a solvent-screening strategy for extractive distillation based on molecular polarity and interaction energy analysis.Quantum chemical calculations identified ethylene glycol(aromatic solubility) and N,N-dimethylformamide(alkane selectivity) as optimal solvents,with weak hydrogen bonds(e.g.,O-H…π,C-H…π) governing aromatic interactions.Two process designs were developed:(1) solvent extraction followed by primary extractive distillation(purity >95.0%(mass)) and(2) direct two-stage extractive distillation(purity>92.0%(mass)).This work provides a flexible framework for polycyclic aromatic hydrocarbon separation tailored to market demands while elucidating solvent-solute interactions at the molecular level.展开更多
Free organic solvent ink containing graphite, carboxymethyl cellulose and microfibrillated cellulose as active material, dispersing and binder, respectively, has been formulated to produce flexible and eco- sustainabl...Free organic solvent ink containing graphite, carboxymethyl cellulose and microfibrillated cellulose as active material, dispersing and binder, respectively, has been formulated to produce flexible and eco- sustainable electrodes for lithium ion batteries. Content ratio of components and dispersion protocol were tailored in order to have theological properties suitable for a large and cheap manufacturing process as well as screen printing. The bio-sourced printed electrodes exhibit a high porosity value of 70% that limits the electrochemical performances. However, the calendering process enhances electrode performances by increasing the reversible capacity from 85 until 315 mAh/g and reducing porosity to an optimal value of 34%. Moreover the introduction of 2% w/w of monofluoro-ethylene carbonate in the electrolyte reduced their reversible capacity loss of 11% in the printed electrode.展开更多
基金supported by the National Natural Science Foundation of China (22021004)。
文摘The oversupply of diesel in China necessitates efficient separation of polycyclic aromatic hydrocarbons from fluidized catalytic cracking diesel for value-added utilization.However,purification is hindered by alkane and monocyclic aromatic interference.In this work,we propose a solvent-screening strategy for extractive distillation based on molecular polarity and interaction energy analysis.Quantum chemical calculations identified ethylene glycol(aromatic solubility) and N,N-dimethylformamide(alkane selectivity) as optimal solvents,with weak hydrogen bonds(e.g.,O-H…π,C-H…π) governing aromatic interactions.Two process designs were developed:(1) solvent extraction followed by primary extractive distillation(purity >95.0%(mass)) and(2) direct two-stage extractive distillation(purity>92.0%(mass)).This work provides a flexible framework for polycyclic aromatic hydrocarbon separation tailored to market demands while elucidating solvent-solute interactions at the molecular level.
基金partially supported by theénergies du Futur Carnot Institute(Investissements d’Avenir-grant agreement No.ANR-11-CARN-030-01)the facilities of the Tek Li Cell platform funded by the Région Rhone-Alpes(ERDF:European Regional Development Fund)
文摘Free organic solvent ink containing graphite, carboxymethyl cellulose and microfibrillated cellulose as active material, dispersing and binder, respectively, has been formulated to produce flexible and eco- sustainable electrodes for lithium ion batteries. Content ratio of components and dispersion protocol were tailored in order to have theological properties suitable for a large and cheap manufacturing process as well as screen printing. The bio-sourced printed electrodes exhibit a high porosity value of 70% that limits the electrochemical performances. However, the calendering process enhances electrode performances by increasing the reversible capacity from 85 until 315 mAh/g and reducing porosity to an optimal value of 34%. Moreover the introduction of 2% w/w of monofluoro-ethylene carbonate in the electrolyte reduced their reversible capacity loss of 11% in the printed electrode.
