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Thermodynamic analysis of low-rank-coal-based oxygen-thermal acetylene manufacturing process system / Jing Guo in Industrial & engineering chemistry research, Vol. 51 N° 41 (Octobre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 41 (Octobre 2012) . - pp. 13414–13422 Titre : Thermodynamic analysis of low-rank-coal-based oxygen-thermal acetylene manufacturing process system Type de document : texte imprimé Auteurs : Jing Guo, Auteur ; Danxing Zheng, Auteur Année de publication : 2012 Article en page(s) : pp. 13414–13422 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Thermodynamic  Process  system Résumé : In this paper, the low-rank-coal-based oxygen-thermal method acetylene manufacturing process is established and simulated. Through the novel graphic analysis tool EFGD (Exergy-flow Framework Grassman Diagram), the energy supply and demand, the energy utilization, and energy consumption distribution are therefore obtained. Results show that the carbide furnace unit is the largest exergy loss unit, and its internal exergy loss accounts for 57.52% of the total internal exergy loss, reducing carbon consumption in a carbide furnace and reusing the off-gas will do better to improve the energy consumption of the whole system. Moreover, to further investigate the thermodynamic mechanism of energy coupling and energy conversion as well as the cause of high energy consumption, the energy configuration with ΔG-T and the α-H-ε diagram analysis is established. It reveals that the carbon combustion reaction in oxygen for CO production plays a major role in promoting the reaction for this process. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301986q [article] Thermodynamic analysis of low-rank-coal-based oxygen-thermal acetylene manufacturing process system [texte imprimé] / Jing Guo, Auteur ; Danxing Zheng, Auteur . - 2012 . - pp. 13414–13422. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 41 (Octobre 2012) . - pp. 13414–13422 Mots-clés : Thermodynamic  Process  system Résumé : In this paper, the low-rank-coal-based oxygen-thermal method acetylene manufacturing process is established and simulated. Through the novel graphic analysis tool EFGD (Exergy-flow Framework Grassman Diagram), the energy supply and demand, the energy utilization, and energy consumption distribution are therefore obtained. Results show that the carbide furnace unit is the largest exergy loss unit, and its internal exergy loss accounts for 57.52% of the total internal exergy loss, reducing carbon consumption in a carbide furnace and reusing the off-gas will do better to improve the energy consumption of the whole system. Moreover, to further investigate the thermodynamic mechanism of energy coupling and energy conversion as well as the cause of high energy consumption, the energy configuration with ΔG-T and the α-H-ε diagram analysis is established. It reveals that the carbon combustion reaction in oxygen for CO production plays a major role in promoting the reaction for this process. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301986q

Working pair selection of compression and absorption hybrid cycles through predicting the activity coefficients of hydrofluorocarbon + ionic liquid Systems by the UNIFAC model / Li Dong in Industrial & engineering chemistry research, Vol. 51 N° 12 (Mars 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 12 (Mars 2012) . - pp. 4741–4747 Titre : Working pair selection of compression and absorption hybrid cycles through predicting the activity coefficients of hydrofluorocarbon + ionic liquid Systems by the UNIFAC model Type de document : texte imprimé Auteurs : Li Dong, Auteur ; Danxing Zheng, Auteur ; Xianghong Wu, Auteur Année de publication : 2012 Article en page(s) : pp. 4741–4747 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Absorption  hybrid  Ionic  liquid Résumé : Hydrofluorocarbon (HFC) + ionic liquid (IL) systems can be adopted as working pairs for compression/absorption hybrid cycles. A method of selecting novel working pairs has been proposed in this paper, that the infinite dilution activity coefficients (γ1∞) of working pair system need to be obtained, and the UNIFAC model is implemented to predict the activity coefficients of the working pair system. With the help of published experimental vapor–liquid equilibrium (VLE) data of 18 HFC + IL systems, 16 new group interaction parameters for four anion ILs and nine HFCs have been fitted to extend the evaluating and predicting range of HFC + IL systems for developing alternative working pairs. To validate the reliability of the method, the model parameters have been used to calculate the VLE data with the average relative deviations (ARDs) of pressures less than 8.5%. The prediction of the γ1∞ shows that the solubility and affinity between HFCs and ILs increase with the decrease of the γ1∞, which is in agreement with the experimental results. It is found by the prediction that the combinations of R32/R134 and [Tf2N]-based ILs may be two kinds of potential working pairs to improve the performances of compression/absorption hybrid cycles. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202029d [article] Working pair selection of compression and absorption hybrid cycles through predicting the activity coefficients of hydrofluorocarbon + ionic liquid Systems by the UNIFAC model [texte imprimé] / Li Dong, Auteur ; Danxing Zheng, Auteur ; Xianghong Wu, Auteur . - 2012 . - pp. 4741–4747. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 12 (Mars 2012) . - pp. 4741–4747 Mots-clés : Absorption  hybrid  Ionic  liquid Résumé : Hydrofluorocarbon (HFC) + ionic liquid (IL) systems can be adopted as working pairs for compression/absorption hybrid cycles. A method of selecting novel working pairs has been proposed in this paper, that the infinite dilution activity coefficients (γ1∞) of working pair system need to be obtained, and the UNIFAC model is implemented to predict the activity coefficients of the working pair system. With the help of published experimental vapor–liquid equilibrium (VLE) data of 18 HFC + IL systems, 16 new group interaction parameters for four anion ILs and nine HFCs have been fitted to extend the evaluating and predicting range of HFC + IL systems for developing alternative working pairs. To validate the reliability of the method, the model parameters have been used to calculate the VLE data with the average relative deviations (ARDs) of pressures less than 8.5%. The prediction of the γ1∞ shows that the solubility and affinity between HFCs and ILs increase with the decrease of the γ1∞, which is in agreement with the experimental results. It is found by the prediction that the combinations of R32/R134 and [Tf2N]-based ILs may be two kinds of potential working pairs to improve the performances of compression/absorption hybrid cycles. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202029d