NiCe/Al2O3 coated onto cordierite monoliths applied to Oxidative Dehydrogenation of Ethane (ODE)

P. BRUSSINO; J. P. BORTOLOZZI; V. G. MILT; E. D. BANÚS; M. A. ULLA

CATALYSIS TODAY

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2016 vol. 273 p. 259 - 265

0920-5861

The present work investigates the preparation of NiCe/-Al2O3coated cordierite monoliths for oxidativedehydrogenation of ethane (ODE) reaction through a two steps procedure: the primer deposition of a-Al2O3coating consisting in a mixture of micro and nanoparticles via the washcoating method and thelatter incorporation of the active phase by impregnation. Moreover, a modification in these two stepswas made: the suppression of some calcination steps to save energy in the manufacture process. Thestructured catalysts, named as Ni(X)Ce(Y)-M, where X = 13 or 19 wt%. Ni and Y = 5 or 8 wt%. Ce respectively,with respect to the alumina loading, were characterized by SEM/EDX, XRD, FTIR, LRS and XPS, and theircatalytic activity was tested in the ODE reaction. Furthermore, their mechanical resistance to vibrationwas studied. Similar results corresponding to the un-promoted system are also presented for comparison.It was found that the co-impregnation of nickel and cerium was affected by the suppression of somecalcinations: a preferential absorption of Ce rather than Ni occurred, generating at the end a catalyticcoating with a higher Ce/Ni ratio than that of the precursor solution and a lower Ni loading than thatof Ni(13)-M. On the other side, in the NiCe-based catalysts the properties of the active sites remainedthe same despite the increment in the active phase, at a fixed Ce/Ni nominal atomic ratio of 0.17. In thecase of the Ni(19)Ce(8)-M system, although the Ni/Al atomic ratios were found lower than those of thenominal ones by EDX and XPS and ethylene selectivity decayed, ethane conversion resulted markedlyhigher, leading to an improved ethylene yield.