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Fundamentals of petroleum residue cracking gasification for coproduction of oil and syngas / YuMing Zhang in Industrial & engineering chemistry research, Vol. 51 N° 46 (Novembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 46 (Novembre 2012) . - pp. 15032-15040 Titre : Fundamentals of petroleum residue cracking gasification for coproduction of oil and syngas Type de document : texte imprimé Auteurs : YuMing Zhang, Auteur ; Deping Yu, Auteur ; Wangliang Li, Auteur Année de publication : 2013 Article en page(s) : pp. 15032-15040 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Synthesis  gas  Gasification  Cracking  Petroleum Résumé : Vacuum residue (VR) was stepwise converted via catalytic cracking for liquid and coke gasification for hydrogen-rich syngas in a fluidized bed reactor. Silica sand and spent equilibrium FCC (E-FCC) catalyst were used as the catalysts for VR cracking. The liquid yield was about 89 wt % at 568 °C using silica sand as catalyst and the conversion ratio of heavy fractions was only 55%. About 60 wt % VR was converted into gas and coke over the E-FCC catalyst at 480 °C, showing that the catalyst had too strong acidity for VR cracking. The E-FCC catalyst was thus modified (aged) with both hydrothermal treatment and impregnation of alkali and alkaline-earth metals (K and Mg) to weaken its acidity and facilitate the liquid oil production. The aged FCC (A-FCC) catalyst exhibited appropriate cracking activity to allow both the expected liquid yield of about 80 wt % and heavy fraction conversion ratio of up to 98 wt %. Steam gasification of the deposited coke on the surface of the A-FCC catalyst resulted in the production of syngas containing CO and H2 content to be about 45 and 42 vol %, respectively. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26679622 [article] Fundamentals of petroleum residue cracking gasification for coproduction of oil and syngas [texte imprimé] / YuMing Zhang, Auteur ; Deping Yu, Auteur ; Wangliang Li, Auteur . - 2013 . - pp. 15032-15040. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 46 (Novembre 2012) . - pp. 15032-15040 Mots-clés : Synthesis  gas  Gasification  Cracking  Petroleum Résumé : Vacuum residue (VR) was stepwise converted via catalytic cracking for liquid and coke gasification for hydrogen-rich syngas in a fluidized bed reactor. Silica sand and spent equilibrium FCC (E-FCC) catalyst were used as the catalysts for VR cracking. The liquid yield was about 89 wt % at 568 °C using silica sand as catalyst and the conversion ratio of heavy fractions was only 55%. About 60 wt % VR was converted into gas and coke over the E-FCC catalyst at 480 °C, showing that the catalyst had too strong acidity for VR cracking. The E-FCC catalyst was thus modified (aged) with both hydrothermal treatment and impregnation of alkali and alkaline-earth metals (K and Mg) to weaken its acidity and facilitate the liquid oil production. The aged FCC (A-FCC) catalyst exhibited appropriate cracking activity to allow both the expected liquid yield of about 80 wt % and heavy fraction conversion ratio of up to 98 wt %. Steam gasification of the deposited coke on the surface of the A-FCC catalyst resulted in the production of syngas containing CO and H2 content to be about 45 and 42 vol %, respectively. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26679622

Separation of succinic acid from fermentation broth using weak alkaline anion exchange adsorbents / Qiang Li in Industrial & engineering chemistry research, Vol. 48 N° 7 (Avril 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 7 (Avril 2009) . - pp. 3595–3599 Titre : Separation of succinic acid from fermentation broth using weak alkaline anion exchange adsorbents Type de document : texte imprimé Auteurs : Qiang Li, Auteur ; Jianmin Xing, Auteur ; Wangliang Li, Auteur Année de publication : 2009 Article en page(s) : pp. 3595–3599 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Succinic  acid  Separation  Adsorption  Weak  alkaline  anion  exchange  adsorbe  Langmuir/Freundlich  isotherm  models  Pseudo-first/second-order  equations Résumé : Succinic acid is one of the platform chemicals that can be bioproduced from renewable resources. Separation of succinic acid by adsorption from model solutions and fermentation broth by weak alkaline anion exchange adsorbents was studied. Adsorption capacities and regenerability of several sorts of adsorbents were tested. In a static test, the adsorbent NERCB 09 has the adsorption capacity of 0.11 g succinic acid g−1 at succinic acid concentrations of 5 g L−1. In packed column test, its capacity was as high as 0.56 g succinic acid g−1 when the feeding concentration was 50 g L−1. NERCB 09 showed the high selectivity toward succinate over both glucose and amino acid at acidic or neutral conditions. Langmuir/Freundlich isotherm models and pseudo-first/second-order equations were presented to simulate the adsorption behavior. Data showed that the temperature had little effect on the adsorption isotherm. Kinetic parameters suggested that about 1.5 h were sufficient for the adsorption equilibrium. The adsorbent was easily regenerated. The adsorption capacity was steady after 30 cycles and showed 96% average recovery. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801304k [article] Separation of succinic acid from fermentation broth using weak alkaline anion exchange adsorbents [texte imprimé] / Qiang Li, Auteur ; Jianmin Xing, Auteur ; Wangliang Li, Auteur . - 2009 . - pp. 3595–3599. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 7 (Avril 2009) . - pp. 3595–3599 Mots-clés : Succinic  acid  Separation  Adsorption  Weak  alkaline  anion  exchange  adsorbe  Langmuir/Freundlich  isotherm  models  Pseudo-first/second-order  equations Résumé : Succinic acid is one of the platform chemicals that can be bioproduced from renewable resources. Separation of succinic acid by adsorption from model solutions and fermentation broth by weak alkaline anion exchange adsorbents was studied. Adsorption capacities and regenerability of several sorts of adsorbents were tested. In a static test, the adsorbent NERCB 09 has the adsorption capacity of 0.11 g succinic acid g−1 at succinic acid concentrations of 5 g L−1. In packed column test, its capacity was as high as 0.56 g succinic acid g−1 when the feeding concentration was 50 g L−1. NERCB 09 showed the high selectivity toward succinate over both glucose and amino acid at acidic or neutral conditions. Langmuir/Freundlich isotherm models and pseudo-first/second-order equations were presented to simulate the adsorption behavior. Data showed that the temperature had little effect on the adsorption isotherm. Kinetic parameters suggested that about 1.5 h were sufficient for the adsorption equilibrium. The adsorbent was easily regenerated. The adsorption capacity was steady after 30 cycles and showed 96% average recovery. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801304k