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Titre :
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Separation of p-chloronitrobenzene and o-chloronitrobenzene by selective adsorption using Silicalite-1 zeolite (2010)
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Auteurs :
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Zhaobing Guo, Auteur ;
Shourong Zheng, Auteur ;
Zheng Zheng, Auteur
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Type de document :
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Article : texte imprimé
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Dans :
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Chemical engineering journal (Vol. 155 N° 3, Decembre 2009)
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Article en page(s) :
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pp. 654-659
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Note générale :
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Génie Chimique
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Langues :
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Anglais
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Index. décimale :
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660
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Tags :
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Chloronitrobenzene Silicalite-1 zeolite Adsorption Separation
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Résumé :
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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.
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DEWEY :
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660
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ISSN :
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1385-8947
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En ligne :
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http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFJ-4X49YKT-2&_user=6909337&_coverDate=12%2F15%2F2009&_rdoc=12&_fmt=high&_orig=browse&_srch=doc-info%28%23toc%235228%232009%23998449996%231562277%23FLA%23display%23Volume%29&_cdi=5228&_sort=d&_doc
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