Download or read book Utilisation de catalyseurs base de carbures de m taux de transition du groupe 6 dans les r actions d hydrod chloration de chlorofluorocarbure written by Laurent Delannoy and published by . This book was released on 2000 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: La formation des composes insatures peut s'interpreter soit par la recombinaison d'entites carbeniques (cf 2 ou ch 2) adsorbees, soit, plus probablement, par des reactions de deshydrohalogenation-hydrogenation successives. Cette derniere hypothese implique la presence de sites acido-basiques en surface des carbures. Les proportions en produits secondaires semblent reliees a la stoechiometrie et plus precisement au rapport c/metal des catalyseurs puisque la selectivite en pentafluoroethane est d'autant plus elevee que la valeur de ce rapport tend vers 1. L'etude du comportement catalytique d'un catalyseur wc dont la stoechiometrie de surface a ete modifiee par l'intermediaire de differents traitements d'activation, dans les reactions d'hydrogenolyse du chloropentafluoroethane et de decomposition de l'isopropanol, a permis de confirmer l'influence de ce parametre sur sa selectivite en produits secondaires et parallelement sur le developpement d'une acidite de surface.

Download or read book Dictionary of Building and Civil Engineering written by Don Montague and published by Taylor & Francis. This book was released on 1996 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dual-language dictionary lists over 20,000 specialist terms in both French and English, covering architecture, building, engineering and property terms. It meets the needs of all building professionals working on projects overseas. It has been comprehensively researched and compiled to provide an invaluable reference source in an increasingly European marketplace.

Download or read book Construction Dictionary written by Nawic Education Foundation and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: An extensive listing of the terms and phrases used in construction. Included are many that are encountered daily on the jobsite or in the construction office.