Abstract
The adsorption of methane on silica-supported nickel catalysts was studied at various constant temperatures (30 °C < T < 100 °C) and at increasing temperatures (30 °C < T < 300 °C) using a low-field magnetic method and infrared spectroscopy. In the entire temperature range the chemisorption of CH 4 was found to be dissociative according to the reaction CH 4 + 7Ni → Ni 3C (“surface nickel-carbide”) + 4Ni-H. It was observed that, per unit surface area, small nickel crystallites were more reactive toward methane than were large crystallites.
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