Here's an excerpt from a science news story today about the effect that hydrogen has on graphene... perhaps there is some relevance to what happens inside the reactor when the H2 becomes heated and pressure to increase... =========================== Findings of researchers at the Department of Energy's Oak Ridge National Laboratory demonstrate that hydrogen rather than carbon dictates the graphene grain shape and size, according to a team led by ORNL's Ivan Vlassiouk, a Eugene Wigner Fellow, and Sergei Smirnov, a professor of chemistry at New Mexico State University. This research is published in ACS Nano. "Hydrogen not only initiates the graphene growth, but controls the graphene shape and size," Vlassiouk said. "In our paper, we have described a method to grow well-defined graphene grains that have perfect hexagonal shapes pointing to the faultless single crystal structure." =========================== So the real size and shape of the Ni/catalyst fuel is probably not known unless you prepare to run the reactor, and pressurize it, and even heat it up to ignition, then stop it and look at the fuel... http://www.physorg.com/news/2011-07-hydrogen-key-growth-high-quality-graphene.html
-Mark
