Documents disponibles écrits par cet auteur

Adsorption and diffusion of methanol, glycerol, and their mixtures in a metal organic framework / Yang, Li in Industrial & engineering chemistry research, Vol. 50 N° 24 (Décembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 24 (Décembre 2011) . - pp. 14084-14089 Titre : Adsorption and diffusion of methanol, glycerol, and their mixtures in a metal organic framework Type de document : texte imprimé Auteurs : Yang, Li, Auteur ; Stanley I. Sandler, Auteur ; Dionisios G. Vlachos, Auteur Année de publication : 2012 Article en page(s) : pp. 14084-14089 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Diffusion  Adsorption Résumé : Grand Canonical Monte Carlo (GCMC) simulation has been used to study the adsorption of methanol, glycerol, and their mixtures in the metal organic framework IRMOF-1, and canonical ensemble molecular dynamics simulation was used to study their diffusion in that adsorbent. In particular, we consider the adsorption of pure glycerol in IRMOF-1 at several different temperatures and the diffusion of pure glycerol in IRMOF-1 at infinite dilution. Then, we study the influence of the methanol as solvent and how different concentrations of methanol affect the behavior of glycerol in IRMOF-1. It It is found that the glycerol is easily adsorbed into IRMOF-1, and a small concentration of adsorbed methanol promotes glycerol adsorption. The effect of methanol on the glycerol diffusivity depends on temperature and methanol concentration. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25299876 [article] Adsorption and diffusion of methanol, glycerol, and their mixtures in a metal organic framework [texte imprimé] / Yang, Li, Auteur ; Stanley I. Sandler, Auteur ; Dionisios G. Vlachos, Auteur . - 2012 . - pp. 14084-14089. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 24 (Décembre 2011) . - pp. 14084-14089 Mots-clés : Diffusion  Adsorption Résumé : Grand Canonical Monte Carlo (GCMC) simulation has been used to study the adsorption of methanol, glycerol, and their mixtures in the metal organic framework IRMOF-1, and canonical ensemble molecular dynamics simulation was used to study their diffusion in that adsorbent. In particular, we consider the adsorption of pure glycerol in IRMOF-1 at several different temperatures and the diffusion of pure glycerol in IRMOF-1 at infinite dilution. Then, we study the influence of the methanol as solvent and how different concentrations of methanol affect the behavior of glycerol in IRMOF-1. It It is found that the glycerol is easily adsorbed into IRMOF-1, and a small concentration of adsorbed methanol promotes glycerol adsorption. The effect of methanol on the glycerol diffusivity depends on temperature and methanol concentration. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25299876

Stirring-assisted cloud-point extraction of polycyclic aromatic hydrocarbons / BingJia Yao in Industrial & engineering chemistry research, Vol. 47 n°11 (Juin 2008)

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°11 (Juin 2008) . - p. 3949–3956 Titre : Stirring-assisted cloud-point extraction of polycyclic aromatic hydrocarbons Type de document : texte imprimé Auteurs : BingJia Yao, Auteur ; Yang, Li, Auteur Année de publication : 2008 Article en page(s) : p. 3949–3956 Note générale : Bibliogr. p. 3955-3956 Langues : Anglais (eng) Mots-clés : CPE  process;  Stirring  rate;  Polycyclic  aromatic  hydrocarbons Résumé : A novel cloud-point extraction (CPE) process, namely, stirring-assisted cloud-point extraction (S-CPE), was developed with a stirring rate over 380 rpm in a PEG/PPG-18-18 dimethicone aqueous solution at a temperature over its cloud point. Compared with a general CPE process with centrifugation (C-CPE), the stirring process successfully accelerated the phase separation, where the whole process was able to be finished in 15 min and a lower water content in the surfactant-rich phase was also obtained, e.g., the water content was as low as 52 wt % at a 2 wt % surfactant solution, indicating a higher resulting distribution coefficient. The phase separation of the process was studied with dynamic lighting scattering. Because of the increasing contact chances between micelles and extractable species, the stirring operation is also in favor to increase the extractability of the CPE process, where higher recoveries of polycyclic aromatic hydrocarbons (PAHs) were obtained even with a lower surfactant concentration, e.g., a 98.9% recovery of anthracene was obtained in a 1 wt % surfactant solution. What is more important is that the stirring operation is suitable for a scaling-up process, and the surfactant-rich phase floating upon the solution is more easily collected and removed. In addition, the extractant used in the S-CPE, PEG/PPG-18-18 dimethicone, has little UV absorbance, avoiding the disturbance to the signal of PAHs in UV or fluorescence detector, so it is convenient to determine PAHs concentration in every phase during S-CPE process by high-performance liquid chromatography (HPLC) directly. The stirring operation successfully avoids the low phase-separation efficiency like in the CPE process with heating and has no treatment capacity limitation like in C-CPE. Therefore, S-CPE offers an efficient possibility for scaling up a typical CPE process to be applied in the separation of PAHs in the water treatment. [article] Stirring-assisted cloud-point extraction of polycyclic aromatic hydrocarbons [texte imprimé] / BingJia Yao, Auteur ; Yang, Li, Auteur . - 2008 . - p. 3949–3956. Bibliogr. p. 3955-3956 Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°11 (Juin 2008) . - p. 3949–3956 Mots-clés : CPE  process;  Stirring  rate;  Polycyclic  aromatic  hydrocarbons Résumé : A novel cloud-point extraction (CPE) process, namely, stirring-assisted cloud-point extraction (S-CPE), was developed with a stirring rate over 380 rpm in a PEG/PPG-18-18 dimethicone aqueous solution at a temperature over its cloud point. Compared with a general CPE process with centrifugation (C-CPE), the stirring process successfully accelerated the phase separation, where the whole process was able to be finished in 15 min and a lower water content in the surfactant-rich phase was also obtained, e.g., the water content was as low as 52 wt % at a 2 wt % surfactant solution, indicating a higher resulting distribution coefficient. The phase separation of the process was studied with dynamic lighting scattering. Because of the increasing contact chances between micelles and extractable species, the stirring operation is also in favor to increase the extractability of the CPE process, where higher recoveries of polycyclic aromatic hydrocarbons (PAHs) were obtained even with a lower surfactant concentration, e.g., a 98.9% recovery of anthracene was obtained in a 1 wt % surfactant solution. What is more important is that the stirring operation is suitable for a scaling-up process, and the surfactant-rich phase floating upon the solution is more easily collected and removed. In addition, the extractant used in the S-CPE, PEG/PPG-18-18 dimethicone, has little UV absorbance, avoiding the disturbance to the signal of PAHs in UV or fluorescence detector, so it is convenient to determine PAHs concentration in every phase during S-CPE process by high-performance liquid chromatography (HPLC) directly. The stirring operation successfully avoids the low phase-separation efficiency like in the CPE process with heating and has no treatment capacity limitation like in C-CPE. Therefore, S-CPE offers an efficient possibility for scaling up a typical CPE process to be applied in the separation of PAHs in the water treatment.

The heat transfer performance of horizontal tube bundles in large falling film evaporators / Yang, Li in International journal of refrigeration, Vol. 34 N° 1 (Janvier 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 1 (Janvier 2011) . - pp. 303-316 Titre : The heat transfer performance of horizontal tube bundles in large falling film evaporators Titre original : Performance en termes de transfert de chaleur des faisceaux de tubes horizontaux dans les évaporateurs à film tombant de grandes dimensions Type de document : texte imprimé Auteurs : Yang, Li, Auteur ; Wen Wang, Auteur Année de publication : 2011 Article en page(s) : pp. 303-316 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Evaporator  Falling  film  Bundle  Modelling-simulation  Heat  transfer Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The performance of the horizontal heat transfer tube bundles in falling film evaporators in large compression refrigeration systems was investigated with numerical simulation in this paper. Four types of tubes, including plain tubes, and enhanced surface tubes of Turbo-B, Turbo-BII and Turbo-EHP, were employed in the simulation. Some factors, such as tube kind, tube pass arrangement, dry patch area on tube surface, liquid refrigerant flow rate, and number of flooded tubes, were analyzed based on simulated results. In the study, the maldistribution of liquid refrigerant flow caused by the distributor apparatus was discussed, which severely affects the performance of falling film evaporators according to the simulation. Some calculated results were verified by the experiment. These discussions and results can be used to guide the design of falling film evaporators under realistic flow conditions. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S014070071000157X [article] The heat transfer performance of horizontal tube bundles in large falling film evaporators = Performance en termes de transfert de chaleur des faisceaux de tubes horizontaux dans les évaporateurs à film tombant de grandes dimensions [texte imprimé] / Yang, Li, Auteur ; Wen Wang, Auteur . - 2011 . - pp. 303-316. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 1 (Janvier 2011) . - pp. 303-316 Mots-clés : Evaporator  Falling  film  Bundle  Modelling-simulation  Heat  transfer Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The performance of the horizontal heat transfer tube bundles in falling film evaporators in large compression refrigeration systems was investigated with numerical simulation in this paper. Four types of tubes, including plain tubes, and enhanced surface tubes of Turbo-B, Turbo-BII and Turbo-EHP, were employed in the simulation. Some factors, such as tube kind, tube pass arrangement, dry patch area on tube surface, liquid refrigerant flow rate, and number of flooded tubes, were analyzed based on simulated results. In the study, the maldistribution of liquid refrigerant flow caused by the distributor apparatus was discussed, which severely affects the performance of falling film evaporators according to the simulation. Some calculated results were verified by the experiment. These discussions and results can be used to guide the design of falling film evaporators under realistic flow conditions. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S014070071000157X

The Nature of PH3 decomposition reaction over amorphous CoNiBP alloy supported on carbon nanotubes / Lili Li in Industrial & engineering chemistry research, Vol. 49 N° 4 (Fevrier 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 4 (Fevrier 2010) . - pp 1658–1662 Titre : The Nature of PH3 decomposition reaction over amorphous CoNiBP alloy supported on carbon nanotubes Type de document : texte imprimé Auteurs : Lili Li, Auteur ; Han, Changxiu, Auteur ; Yang, Li, Auteur Année de publication : 2010 Article en page(s) : pp 1658–1662 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Carbon  nanotube  Amorphous  CoNiBP. Résumé : The carbon nanotubes (CNTs) supported amorphous CoNiBP catalyst is synthesized by means of induced electroless-plating method. The morphology, structure, and composition of the catalyst are characterized using a number of analytical instrumentations including transmission electron microscopy, X-ray diffraction, BET surface area measurement, and inductively coupled plasma. The activity of the catalyst in phosphine decomposition reaction is measured and correlated with its surface and structural properties. The characterization results show that the amorphous CoNiBP alloy nanoparticles, having average diameters of about 5−9 nm and 8−12 nm, are uniformly distributed inside and on the surface of CNTs, respectively. During phosphine decomposition reaction, some of phosphorus atoms migrate onto the CoNiBP particles, forming crystalline CoP phase which acts as the dominant active phase for phosphine decomposition reaction. Furthermore, the CoNiBP/CNTs catalyst exhibits high activity and stability in phosphine decomposition reaction. When operated in a fixed-bed reactor at 380 °C, single-pass phosphine conversion of about 99.7% can be achieved. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9015478 [article] The Nature of PH3 decomposition reaction over amorphous CoNiBP alloy supported on carbon nanotubes [texte imprimé] / Lili Li, Auteur ; Han, Changxiu, Auteur ; Yang, Li, Auteur . - 2010 . - pp 1658–1662. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 4 (Fevrier 2010) . - pp 1658–1662 Mots-clés : Carbon  nanotube  Amorphous  CoNiBP. Résumé : The carbon nanotubes (CNTs) supported amorphous CoNiBP catalyst is synthesized by means of induced electroless-plating method. The morphology, structure, and composition of the catalyst are characterized using a number of analytical instrumentations including transmission electron microscopy, X-ray diffraction, BET surface area measurement, and inductively coupled plasma. The activity of the catalyst in phosphine decomposition reaction is measured and correlated with its surface and structural properties. The characterization results show that the amorphous CoNiBP alloy nanoparticles, having average diameters of about 5−9 nm and 8−12 nm, are uniformly distributed inside and on the surface of CNTs, respectively. During phosphine decomposition reaction, some of phosphorus atoms migrate onto the CoNiBP particles, forming crystalline CoP phase which acts as the dominant active phase for phosphine decomposition reaction. Furthermore, the CoNiBP/CNTs catalyst exhibits high activity and stability in phosphine decomposition reaction. When operated in a fixed-bed reactor at 380 °C, single-pass phosphine conversion of about 99.7% can be achieved. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9015478