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Analysis of gaseous and liquid products from pressurized pyrolysis of flax straw in a fixed bed reactor / Mohammad Shahed Hasan Khan Tushar in Industrial & engineering chemistry research, Vol. 49 N° 10 (Mai 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 10 (Mai 2010) . - pp. 4627–4632 Titre : Analysis of gaseous and liquid products from pressurized pyrolysis of flax straw in a fixed bed reactor Type de document : texte imprimé Auteurs : Mohammad Shahed Hasan Khan Tushar, Auteur ; Nader Mahinpey, Auteur ; Pulikesi Murugan, Auteur Année de publication : 2010 Article en page(s) : pp. 4627–4632 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Gas  Liquid Résumé : Pyrolysis of flax straw was investigated under a nitrogen atmosphere using a tubular reactor at different pressures, ranging from 10 to 40 psi. The effects of pressure on the pyrolysis yields and the products obtained (gas, liquid, char) have been analyzed. The gaseous products were analyzed by online GC, and the bio-oils were characterized by gas chromatography/mass spectrometry (GC/MS). Scanning electron microscopy (SEM) was used to view the char surfaces in order to characterize the char and validate the presence of porosity. As the pyrolysis pressure increased, the yield of char and liquid decreased while the gas products increased. The gas products were mainly CO, H2, CO2, CH4, and C3’s. The bio-oils were mostly composed of phenolic compounds, carboxylic acids, and furfural. The pH and the density of the bio-oil revealed a moderate increase with increasing pressure. The SEM study confirms the porous nature of the char. Overall, bio-oil production was maximized at 10 psi; however, char and hydrogen production was maximized at 20 psi. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie902036v [article] Analysis of gaseous and liquid products from pressurized pyrolysis of flax straw in a fixed bed reactor [texte imprimé] / Mohammad Shahed Hasan Khan Tushar, Auteur ; Nader Mahinpey, Auteur ; Pulikesi Murugan, Auteur . - 2010 . - pp. 4627–4632. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 10 (Mai 2010) . - pp. 4627–4632 Mots-clés : Gas  Liquid Résumé : Pyrolysis of flax straw was investigated under a nitrogen atmosphere using a tubular reactor at different pressures, ranging from 10 to 40 psi. The effects of pressure on the pyrolysis yields and the products obtained (gas, liquid, char) have been analyzed. The gaseous products were analyzed by online GC, and the bio-oils were characterized by gas chromatography/mass spectrometry (GC/MS). Scanning electron microscopy (SEM) was used to view the char surfaces in order to characterize the char and validate the presence of porosity. As the pyrolysis pressure increased, the yield of char and liquid decreased while the gas products increased. The gas products were mainly CO, H2, CO2, CH4, and C3’s. The bio-oils were mostly composed of phenolic compounds, carboxylic acids, and furfural. The pH and the density of the bio-oil revealed a moderate increase with increasing pressure. The SEM study confirms the porous nature of the char. Overall, bio-oil production was maximized at 10 psi; however, char and hydrogen production was maximized at 20 psi. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie902036v

Determination of distributed activation energy model kinetic parameters using simulated annealing optimization method for nonisothermal pyrolysis of lignin / Thilakavathi Mani in Industrial & engineering chemistry research, Vol. 48 N°3 (Février 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N°3 (Février 2009) . - p. 1464–1467 Titre : Determination of distributed activation energy model kinetic parameters using simulated annealing optimization method for nonisothermal pyrolysis of lignin Type de document : texte imprimé Auteurs : Thilakavathi Mani, Auteur ; Pulikesi Murugan, Auteur ; Nader Mahinpey, Auteur Année de publication : 2009 Article en page(s) : p. 1464–1467 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Energy  model  --  distribution  Energy  kinetic Résumé : The distributed activation energy model (DAEM) has been shown to be more descriptive of the pyrolysis reaction than other applicable models. In this study, the temperature dependency of the preexponential factor has been included in the DAEM. The model equation has been solved using Simpson’s 1/3 rule, and the kinetic parameters were determined using an optimization method. Simulated annealing method has been used to determine the DAEM kinetic parameters for the nonisothermal pyrolysis of lignin using thermogravimetric analysis (TGA) data. The nonisothermal pyrolysis of lignin was conducted at three different heating rates of 5, 10, and 15 °C/min under nitrogen atmosphere. Predicted results from the optimum kinetic parameters have been compared with the experimental data. The DAEM equation predicts the experimental data very well for different heating rates. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8013605 [article] Determination of distributed activation energy model kinetic parameters using simulated annealing optimization method for nonisothermal pyrolysis of lignin [texte imprimé] / Thilakavathi Mani, Auteur ; Pulikesi Murugan, Auteur ; Nader Mahinpey, Auteur . - 2009 . - p. 1464–1467. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°3 (Février 2009) . - p. 1464–1467 Mots-clés : Energy  model  --  distribution  Energy  kinetic Résumé : The distributed activation energy model (DAEM) has been shown to be more descriptive of the pyrolysis reaction than other applicable models. In this study, the temperature dependency of the preexponential factor has been included in the DAEM. The model equation has been solved using Simpson’s 1/3 rule, and the kinetic parameters were determined using an optimization method. Simulated annealing method has been used to determine the DAEM kinetic parameters for the nonisothermal pyrolysis of lignin using thermogravimetric analysis (TGA) data. The nonisothermal pyrolysis of lignin was conducted at three different heating rates of 5, 10, and 15 °C/min under nitrogen atmosphere. Predicted results from the optimum kinetic parameters have been compared with the experimental data. The DAEM equation predicts the experimental data very well for different heating rates. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8013605