Today, a sizable market for hydrogen exists largely because of its use as a carbon dioxide free fuel. However, currently the most common way of producing hydrogen gas involves complete methane oxidation to produce the stoichiometric carbon dioxide, analogous to methane combustion. Our lab instead focuses on methane pyrolysis, which sacrifices some of the potential energy in the total oxidation of methane to yield solid carbon as a co-product with hydrogen. Although this solid carbon sequesters the harmful carbon dioxide, its accumulation in continually running pyrolysis reactors causes clogging. My research focuses on molten liquid reaction media, which provide a potential way to continuously remove the solid carbon coproduct during methane pyrolysis. It is largely unknown how solid carbon develops and aggregates on a liquid’s surface, so in situ video microscopy was taken to study the formation dynamics of solid carbon aggregates. From video imaging obtained on different liquid surfaces we compare the rates and morphologies of carbons formed on different high temperature liquids including: noncatalytic gallium and copper, and catalytic copper bismuth alloy and nickel bismuth alloy. The structure of the solid carbons formed was characterized ex situ using microscope imaging and Raman spectroscopy. We found that the carbon formed on non-catalytic materials is much more mobile and feed gas velocity dependent than the catalytic ones, and the carbon formed on all of them is amorphous at the surface.