Documents disponibles écrits par cet auteur

Catalytic hydrocracking of pyrolytic lignin to liquid fuel in supercritical ethanol / Zhe Tang in Industrial & engineering chemistry research, Vol. 49 N° 5 (Mars 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 5 (Mars 2010) . - pp. 2040–2046 Titre : Catalytic hydrocracking of pyrolytic lignin to liquid fuel in supercritical ethanol Type de document : texte imprimé Auteurs : Zhe Tang, Auteur ; Ying Zhang, Auteur ; Qingxiang Guo, Auteur Année de publication : 2010 Article en page(s) : pp. 2040–2046 Note générale : Industrial Chemistry Langues : Anglais (eng) Mots-clés : Pyrolysis;  Hydrocracking;  Ethanol Résumé : Pyrolytic lignins (PLs) are the major components in fast pyrolysis bio-oils and have detrimental effects on bio-oil properties. The existence of PLs also makes bio-oil upgrading rather difficult due to their nonvolatility and thermal instability. In this study, PL produced from rice husk was hydrocracked at 260 °C in supercritical ethanol under a hydrogen atmosphere by the use of Ru/ZrO2/SBA-15 or Ru/SO42−/ZrO2/SBA-15 catalyst. Trace amount of tar or coke was produced after the hydrocracking process, and most of the PL was converted into liquid fuel consisting of stable organic compounds with a heating value as high as 34.94 MJ/kg. The liquid product distribution was investigated by gas chromatography/mass spectrometry (GC-MS). The results demonstrated that, under supercritical ethanol conditions, Ru/ZrO2/SBA-15 and Ru/SO42−/ZrO2/SBA-15 were effective catalysts to convert PL to stable organic compounds such as phenols, guaiacols, anisoles, esters, light ketones, alcohols, long-chain alkanes. Note de contenu : Bibliogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9015842 [article] Catalytic hydrocracking of pyrolytic lignin to liquid fuel in supercritical ethanol [texte imprimé] / Zhe Tang, Auteur ; Ying Zhang, Auteur ; Qingxiang Guo, Auteur . - 2010 . - pp. 2040–2046. Industrial Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 5 (Mars 2010) . - pp. 2040–2046 Mots-clés : Pyrolysis;  Hydrocracking;  Ethanol Résumé : Pyrolytic lignins (PLs) are the major components in fast pyrolysis bio-oils and have detrimental effects on bio-oil properties. The existence of PLs also makes bio-oil upgrading rather difficult due to their nonvolatility and thermal instability. In this study, PL produced from rice husk was hydrocracked at 260 °C in supercritical ethanol under a hydrogen atmosphere by the use of Ru/ZrO2/SBA-15 or Ru/SO42−/ZrO2/SBA-15 catalyst. Trace amount of tar or coke was produced after the hydrocracking process, and most of the PL was converted into liquid fuel consisting of stable organic compounds with a heating value as high as 34.94 MJ/kg. The liquid product distribution was investigated by gas chromatography/mass spectrometry (GC-MS). The results demonstrated that, under supercritical ethanol conditions, Ru/ZrO2/SBA-15 and Ru/SO42−/ZrO2/SBA-15 were effective catalysts to convert PL to stable organic compounds such as phenols, guaiacols, anisoles, esters, light ketones, alcohols, long-chain alkanes. Note de contenu : Bibliogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9015842

Catalytic upgrading of biomass fast pyrolysis vapors with Pd/SBA-15 catalysts / Qiang Lu in Industrial & engineering chemistry research, Vol. 49 N° 6 (Mars 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 6 (Mars 2010) . - pp. 2573–2580 Titre : Catalytic upgrading of biomass fast pyrolysis vapors with Pd/SBA-15 catalysts Type de document : texte imprimé Auteurs : Qiang Lu, Auteur ; Zhe Tang, Auteur ; Ying Zhang, Auteur Année de publication : 2010 Article en page(s) : pp. 2573–2580 Note générale : Industrial Chemistry Langues : Anglais (eng) Mots-clés : Catalytic  Upgrading  Biomass  Fast  Pyrolysis  Vapors  Pd/SBA-15  Catalysts Résumé : Palladium supported on SBA-15 catalysts were developed and employed for catalytic cracking of biomass fast pyrolysis vapors using analytical pyrolysis−gas chromatography/mass spectrometry (Py-GC/MS). The Pd/SBA-15 catalysts displayed prominent capabilities to crack the lignin-derived oligomers to monomeric phenolic compounds and further convert them to phenols without the carbonyl group and unsaturated C−C bond on the side chain. Moreover, the catalysts almost completely eliminated the anhydrosugar products and decarbonylated the furan compounds. They also significantly decreased the linear aldehydes and dehydroxylated the linear ketones. In addition, the catalysts slightly decreased the acids, while methanol and hydrocarbons were increased. The above catalytic capabilities of the Pd/SBA-15 catalyst were enhanced with the increase of Pd content from 0.79 wt % to 3.01 wt %. ISSN : 08885-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901198s [article] Catalytic upgrading of biomass fast pyrolysis vapors with Pd/SBA-15 catalysts [texte imprimé] / Qiang Lu, Auteur ; Zhe Tang, Auteur ; Ying Zhang, Auteur . - 2010 . - pp. 2573–2580. Industrial Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 6 (Mars 2010) . - pp. 2573–2580 Mots-clés : Catalytic  Upgrading  Biomass  Fast  Pyrolysis  Vapors  Pd/SBA-15  Catalysts Résumé : Palladium supported on SBA-15 catalysts were developed and employed for catalytic cracking of biomass fast pyrolysis vapors using analytical pyrolysis−gas chromatography/mass spectrometry (Py-GC/MS). The Pd/SBA-15 catalysts displayed prominent capabilities to crack the lignin-derived oligomers to monomeric phenolic compounds and further convert them to phenols without the carbonyl group and unsaturated C−C bond on the side chain. Moreover, the catalysts almost completely eliminated the anhydrosugar products and decarbonylated the furan compounds. They also significantly decreased the linear aldehydes and dehydroxylated the linear ketones. In addition, the catalysts slightly decreased the acids, while methanol and hydrocarbons were increased. The above catalytic capabilities of the Pd/SBA-15 catalyst were enhanced with the increase of Pd content from 0.79 wt % to 3.01 wt %. ISSN : 08885-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901198s

One step bio-oil upgrading through hydrotreatment, esterification, and cracking / Zhe Tang in Industrial & engineering chemistry research, Vol. 48 N° 15 (Août 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 15 (Août 2009) . - pp. 6923–6929 Titre : One step bio-oil upgrading through hydrotreatment, esterification, and cracking Type de document : texte imprimé Auteurs : Zhe Tang, Auteur ; Qiang Lu, Auteur ; Ying Zhang, Auteur Année de publication : 2009 Article en page(s) : pp. 6923–6929 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Crude  bio-oil  Supercritical  ethanol  Hydrogen  atmosphere  Pd/SO42−/ZrO2/SBA-15  catalyst Résumé : The crude bio-oil was upgraded in supercritical ethanol under hydrogen atmosphere by using Pd/SO42−/ZrO2/SBA-15 catalyst. This is a novel way to upgrade bio-oil with the combination of hydrotreatment, esterification, and cracking under supercritical conditions. The results indicated that the upgrading process performed effectively and the properties of the upgraded bio-oil were improved significantly. After the upgrading process, a trace amount of tar or coke was produced and most of the organic components were kept in the upgraded bio-oil. No phase separation was observed. The amount of aldehydes and ketones decreased evidently. In particular, aldehydes were almost completely removed. Most acids were converted into corresponding esters, and at the same time many new types of esters were produced. The results of TGA and DTA indicated that macromolecular compounds were decomposed and much more volatile compounds were produced after the upgrading process. The pH value and heating value of the upgraded bio-oil increased; meanwhile, the kinematical viscosity and density decreased compared to those of the crude bio-oil. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900108d [article] One step bio-oil upgrading through hydrotreatment, esterification, and cracking [texte imprimé] / Zhe Tang, Auteur ; Qiang Lu, Auteur ; Ying Zhang, Auteur . - 2009 . - pp. 6923–6929. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 15 (Août 2009) . - pp. 6923–6929 Mots-clés : Crude  bio-oil  Supercritical  ethanol  Hydrogen  atmosphere  Pd/SO42−/ZrO2/SBA-15  catalyst Résumé : The crude bio-oil was upgraded in supercritical ethanol under hydrogen atmosphere by using Pd/SO42−/ZrO2/SBA-15 catalyst. This is a novel way to upgrade bio-oil with the combination of hydrotreatment, esterification, and cracking under supercritical conditions. The results indicated that the upgrading process performed effectively and the properties of the upgraded bio-oil were improved significantly. After the upgrading process, a trace amount of tar or coke was produced and most of the organic components were kept in the upgraded bio-oil. No phase separation was observed. The amount of aldehydes and ketones decreased evidently. In particular, aldehydes were almost completely removed. Most acids were converted into corresponding esters, and at the same time many new types of esters were produced. The results of TGA and DTA indicated that macromolecular compounds were decomposed and much more volatile compounds were produced after the upgrading process. The pH value and heating value of the upgraded bio-oil increased; meanwhile, the kinematical viscosity and density decreased compared to those of the crude bio-oil. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900108d