Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 501813
Title Effect of initial nickel particle size on stability of nickel catalysts for aqueous phase reforming
Author(s) Haasterecht, Tomas Van; Swart, Marten; Jong, Krijn P. De; Bitter, J.H.
Source Journal of Energy Chemistry 25 (2016)2. - ISSN 2095-4956 - p. 289 - 296.
DOI http://dx.doi.org/10.1016/j.jechem.2016.01.006
Department(s) Biobased Chemistry and Technology
VLAG
Publication type Refereed Article in a scientific journal
Publication year 2016
Abstract The deactivation behavior by crystallite growth of nickel nanoparticles on various supports (carbon nanofibers, zirconia, SiC, α-Al2O3 and γ-Al2O3) was investigated in the aqueous phase reforming of ethylene glycol. Supported Ni catalysts of ∼10 wt% were prepared by impregnation of carbon nanofibers (CNF), ZrO2, SiC, γ-Al2O3 and α-Al2O3. The extent of the Ni nanoparticle growth on various support materials follows the order CNF ∼ ZrO2 > SiC > γ-Al2O3 >> α-Al2O3 which sequence, however, was determined by the initial Ni particle size. Based on the observed nickel leaching and the specific growth characteristics; the particle size distribution and the effect of loading on the growth rate, Ostwald ripening is suggested to be the main mechanism contributing to nickel particle growth. Remarkably, initially smaller Ni particles (∼12 nm) supported on α-Al2O3 were found to outgrow Ni particles with initially larger size (∼20 nm). It is put forward that the higher susceptibility with respect to oxidation of the smaller Ni nanoparticles and differences in initial particle size distribution are responsible for this behavior
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