Rational Design of Nickel Phosphide Hydrodesulfurization Catalysts: Controlling Particle Size and Preventing Sintering

Autor:	Mark E. Bussell, Elayaraja Muthuswamy, Galbokka H. Layan Savithra, Stephanie L. Brock, Bo A. Carrillo, Richard H. Bowker
Rok vydání:	2013
Předmět:	Materials science Phosphide General Chemical Engineering Metallurgy Nanoparticle Sintering General Chemistry Catalysis chemistry.chemical_compound chemistry Chemical engineering Oleylamine Materials Chemistry Particle size Temperature-programmed reduction Hydrodesulfurization
Zdroj:	Chemistry of Materials. 25:825-833
ISSN:	1520-5002 0897-4756
DOI:	10.1021/cm302680j
Popis:	The size-dependent catalytic activity of Ni2P for hydrodesulfurization (HDS) remains unstudied because the traditional temperature programmed reduction (TPR) method used in catalyst preparation results in highly polydisperse Ni2P particles. The ability to control the Ni2P particle size in the range 5–20 nm by varying the quantity of oleylamine in solution-phase arrested precipitation reactions is reported. Particles were introduced to a high surface area silica support (Cab-O-Sil, M-7D grade, 200 m2/g) via incipient wetness, and HDS activity was probed against dibenzothiophene (DBT). All samples were less active than TPR prepared materials, and the smallest particles were the least active, contrary to expectation. This is attributed in part to particle sintering under HDS conditions. Sintering occurs independently of wt% loading of catalyst, time, incipient wetness procedure, and ionic additives, at all temperatures greater than 200 °C. Sintering is minimized by encapsulation of Ni2P nanoparticles in a me...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::80c33136e248dd22b9f95f6c6c793d75 https://doi.org/10.1021/cm302680j Zobrazit plný text záznamu