I found a multi author 2006 ppt including Grabowski on this same subject: Anomalous Heat in Deuterium-Palladium Reactions David A. Kidwell, Allison E. Rogers, Kenneth Grabowski, and David Knies .... Chemical effect due to Hydrogen-Deuterium exchange may account for some of the ... lenr-canr.org/powerpoint/KidwellDdoesgasloa.ppt
As Mixtent pointed out the Grabowski paper is only for anomalous heat when a mixture of hydrogen and deuterium are present. It doesn't apply to experiments using pure hydrogen or even pure deuterium. It does however represent one example of a bistable chemical reaction that flips states based on the balance between "covalent bonding on one side and Van der Walls force on the other". Since the H-D exchange method swaps h2 for d1 it is obviously a surface effect outside a cellular lattice which can only hold h1 or d1 per cell (correct me if there is an exception). I suspect Van der Walls forces are concentrated and have steep gradients at the surface to produce the 4:1 loading/ film effect proposed in the Lawandry paper. IMHO this would also produce a preferential environment for monatomic gas on the lattice surface of the catalyst (like open foam cell insulation). D1 can migrate into the open cells - possibly even become fractional while covalent bonds are opposed to fractional translation. Regards fran
