26 research outputs found
Bridge-bonded adsorbates on fcc(100) and fcc(111) surfaces: a kinetic Monte Carlo study
Get PDFCatalysis and Surface Chemistr
Optimal structure of bimetallic catalysts for the A + B2 reaction
No full textWe have determined the most reactive structures of a bimetallic catalyst for the A+B2 reaction when A adsorbs on one component of the catalyst and B2 on the other. We show that there are various structures that can become the most reactive depending on the reaction rate constants. The most reactive structure can be predicted without any calculations or simulations in some limiting cases, but in general this is not possible. A balance has to be found between maximizing the length of the interface between the components, and maximizing the number of sites for the reactant that adsorbs more slowly
Kinetics of Surface Reactions with Lateral Interactions — Theory and Simulations
No full textNo abstract availabl
Applicability of coatings to control metal dusting
No full textWe have performed a long term comparative study between five wrought and three centricast materials, both as-is, and in coated condition. Two commercially available coatings were applied to each different alloy. One coating was aluminum based with a chromium rich intermediate layer. The other coating was nickel rich with substantial amounts of silicon and aluminum. Both types of coating were of good quality, and did not show (micro)defects. The coated and bare alloy samples were exposed in a high pressure metal dusting atmosphere, and characterised based on mass loss, pit depth, pit size and pit density at regular intervals. The results indicate that a properly applied coating can boost the metal dusting resistance of low chromium alloys to a level comparable with alloy 693, for which generally no metal dusting attack is observed. Finally, the effect of micro cracks on the coating performance was assessed. ©2009 by NACE International
