A preliminary study of simultaneous lime treatment and dry digestion of smooth cordgrass for biogas production / Yuegan Liang in Chemical engineering journal, Vol. 174 N° 1 (Octobre 2011)  

Public ISBD [article]  inChemical engineering journal > Vol. 174 N° 1 (Octobre 2011) . - pp.175–181 Titre : A preliminary study of simultaneous lime treatment and dry digestion of smooth cordgrass for biogas production Type de document : texte imprimé Auteurs : Yuegan Liang, Auteur ; Zheng Zheng, Auteur ; Rimao Hua, Auteur Année de publication : 2012 Article en page(s) : pp.175–181 Note générale : Génie chimique Langues : Anglais (eng) Mots-clés : Smooth cordgrass Lime treatment Dry digestion Anaerobic inhibition First-order kinetic Résumé : The technical feasibility of simultaneous lime treatment and dry digestion (SLTD) of smooth cordgrass in a leaching bed reactor at 55 ± 1 °C is discussed. SLTD was carried out in a single reactor with a high initial biogas production rate and volatile solids (VS) removal rate. Biogas yields reached 283.9 and 192.7 mL/g VS, with 10.0 and 9.5 L/d maximum biogas production rates for asynchronous lime treatment and dry digestion (ALTD), and SLTD, respectively. VS removal efficiency reached 69.0% and 71.9% for ALTD and SLTD, respectively. 83.7% and 99% total biogas yields were obtained at the beginning of 30 days digestion for ALTD and SLTD, respectively. The biogas production rate constant gradually reduced with the reduction of easily biodegradable material. Inhibition of anaerobic bacteria occurred at the SLTD experiment during dry digestion, as shown by very little total volatile fatty acid and biogas production after day 20. Sodium, potassium and calcium ions were not responsible for SLTD inhibition. ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science/article/pii/S1385894711010291 [article] A preliminary study of simultaneous lime treatment and dry digestion of smooth cordgrass for biogas production [texte imprimé] / Yuegan Liang, Auteur ; Zheng Zheng, Auteur ; Rimao Hua, Auteur . - 2012 . - pp.175–181. Génie chimique Langues : Anglais (eng) in Chemical engineering journal > Vol. 174 N° 1 (Octobre 2011) . - pp.175–181 Mots-clés : Smooth cordgrass Lime treatment Dry digestion Anaerobic inhibition First-order kinetic Résumé : The technical feasibility of simultaneous lime treatment and dry digestion (SLTD) of smooth cordgrass in a leaching bed reactor at 55 ± 1 °C is discussed. SLTD was carried out in a single reactor with a high initial biogas production rate and volatile solids (VS) removal rate. Biogas yields reached 283.9 and 192.7 mL/g VS, with 10.0 and 9.5 L/d maximum biogas production rates for asynchronous lime treatment and dry digestion (ALTD), and SLTD, respectively. VS removal efficiency reached 69.0% and 71.9% for ALTD and SLTD, respectively. 83.7% and 99% total biogas yields were obtained at the beginning of 30 days digestion for ALTD and SLTD, respectively. The biogas production rate constant gradually reduced with the reduction of easily biodegradable material. Inhibition of anaerobic bacteria occurred at the SLTD experiment during dry digestion, as shown by very little total volatile fatty acid and biogas production after day 20. Sodium, potassium and calcium ions were not responsible for SLTD inhibition. ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science/article/pii/S1385894711010291

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Separation of p-chloronitrobenzene and o-chloronitrobenzene by selective adsorption using Silicalite-1 zeolite / Zhaobing Guo in Chemical engineering journal, Vol. 155 N° 3 (Decembre 2009)  

Public ISBD [article]  inChemical engineering journal > Vol. 155 N° 3 (Decembre 2009) . - pp. 654-659 Titre : Separation of p-chloronitrobenzene and o-chloronitrobenzene by selective adsorption using Silicalite-1 zeolite Type de document : texte imprimé Auteurs : Zhaobing Guo, Auteur ; Shourong Zheng, Auteur ; Zheng Zheng, Auteur Année de publication : 2010 Article en page(s) : pp. 654-659 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Chloronitrobenzene Silicalite-1 zeolite Adsorption Separation Index. décimale : 660 Résumé : Silicalite-1 zeolite was used for selective adsorption and separation of p-chloronitrobenzene (p-CNB) and o-chloronitrobenzene (o-CNB). Maximum adsorption amounts of p-CNB in the zeolite are found to be approximately 4 molecules per unit cell (mol./u.c.), much higher than those of o-CNB. p-CNB molecules are considered to be located in zeolite intersections and channels. CNBs adsorption in Silicalite-1 zeolite follows pseudo-second-order kinetic model. Adsorption amounts and temperatures are the important parameters in affecting CNBs adsorption rate constants. Adsorption rate constants of p-CNB are higher than those of o-CNB in Silicalite-1 zeolite. p-CNB with a purity of 94.9% and o-CNB of 96.1% can be recovered with Silicalite-1 zeolite under an optimal separation condition investigated. Compared with Silicalite-1 zeolite, the presence of acid sites in zeolites is not only favorable for p-CNB selective adsorption from CNBs aqueous solution, but also improves the adsorption heat of p-CNB. DEWEY : 660 ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFJ-4X49YKT-2&_user=6 [...] [article] Separation of p-chloronitrobenzene and o-chloronitrobenzene by selective adsorption using Silicalite-1 zeolite [texte imprimé] / Zhaobing Guo, Auteur ; Shourong Zheng, Auteur ; Zheng Zheng, Auteur . - 2010 . - pp. 654-659. Génie Chimique Langues : Anglais (eng) in Chemical engineering journal > Vol. 155 N° 3 (Decembre 2009) . - pp. 654-659 Mots-clés : Chloronitrobenzene Silicalite-1 zeolite Adsorption Separation Index. décimale : 660 Résumé : Silicalite-1 zeolite was used for selective adsorption and separation of p-chloronitrobenzene (p-CNB) and o-chloronitrobenzene (o-CNB). Maximum adsorption amounts of p-CNB in the zeolite are found to be approximately 4 molecules per unit cell (mol./u.c.), much higher than those of o-CNB. p-CNB molecules are considered to be located in zeolite intersections and channels. CNBs adsorption in Silicalite-1 zeolite follows pseudo-second-order kinetic model. Adsorption amounts and temperatures are the important parameters in affecting CNBs adsorption rate constants. Adsorption rate constants of p-CNB are higher than those of o-CNB in Silicalite-1 zeolite. p-CNB with a purity of 94.9% and o-CNB of 96.1% can be recovered with Silicalite-1 zeolite under an optimal separation condition investigated. Compared with Silicalite-1 zeolite, the presence of acid sites in zeolites is not only favorable for p-CNB selective adsorption from CNBs aqueous solution, but also improves the adsorption heat of p-CNB. DEWEY : 660 ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFJ-4X49YKT-2&_user=6 [...]

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