000064412 001__ 64412
000064412 005__ 20180117124053.0
000064412 0247_ $$2doi$$a10.1016/j.cattod.2017.03.056
000064412 0248_ $$2sideral$$a103505
000064412 037__ $$aART-2018-103505
000064412 041__ $$aeng
000064412 100__ $$0(orcid)0000-0001-9220-9909$$aCazaña, F.
000064412 245__ $$aSynthesis of graphenic nanomaterials by decomposition of methane on a Ni-Cu/biomorphic carbon catalyst. Kinetic and characterization results
000064412 260__ $$c2018
000064412 5060_ $$aAccess copy available to the general public$$fUnrestricted
000064412 5203_ $$aThis work addresses the preparation and application of the synthesis of graphene in Ni-Cu catalysts supported on carbonaceous materials. The catalysts have been prepared by a biomorphic mineralization technique which involves the thermal decomposition, under reductive atmosphere, of commercial cellulose previously impregnated with the metallic precursors. The characterization results indicate that the preparation method leads to the formation of carbonaceous supports with a moderate microporosity (ca. 33% pore volume) and adequate surface area (343 m2/g), maintaining the original external texture. The catalytic performance of these materials was previously tested in liquid phase reactions (Zampieri et al., 2007 [7]). In order to extend the use of these catalysts, in this work we present a study corresponding to a gas phase reaction: the synthesis of graphenic nanomaterials by catalytic decomposition of methane (CDM). The influence of the reaction temperature and of the feed composition (i.e.%CH4 and%H2) has been studied. The graphenic nanomaterials obtained after reaction were characterized by nitrogen adsorption-desorption isotherms, Raman spectroscopy and transmission electron microscopy (TEM). The results indicate that the carbonaceous nanomaterial with the highest quality is obtained operating at 950 °C and feeding 28.6% of CH4 and 14.3% of H2. The evolution of the carbon mass during the reaction time was analysed using a phenomenological kinetic model that takes into account the main stages involved during the formation of carbonaceous nanomaterials (NCMs). The results obtained from the kinetic model along with the characterization results enable the influence of the operating variables on each stage of the carbonaceous nanomaterial formation to be discerned.
000064412 536__ $$9info:eu-repo/grantAgreement/ES/MINECO/ENE2013-47880-C3-1-R
000064412 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
000064412 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000064412 700__ $$0(orcid)0000-0001-6360-4475$$aLatorre, N.$$uUniversidad de Zaragoza
000064412 700__ $$aTarifa, P.
000064412 700__ $$aLabarta, J.
000064412 700__ $$0(orcid)0000-0002-2363-2735$$aRomeo, E.$$uUniversidad de Zaragoza
000064412 700__ $$0(orcid)0000-0002-7836-5777$$aMonzón, A.$$uUniversidad de Zaragoza
000064412 7102_ $$15005$$2555$$aUniversidad de Zaragoza$$bDepartamento de Ingeniería Química y Tecnologías del Medio Ambiente$$cIngeniería Química
000064412 773__ $$g299 (2018), 67-79$$pCatal. today$$tCATALYSIS TODAY$$x0920-5861
000064412 8564_ $$s3536491$$uhttp://zaguan.unizar.es/record/64412/files/texto_completo.pdf$$yPostprint
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000064412 909CO $$ooai:zaguan.unizar.es:64412$$particulos$$pdriver
000064412 951__ $$a2018-01-17-08:55:15
000064412 980__ $$aARTICLE