The Canadian Journal of Chemical Engineering · 1996 · 32 citations · 13 references
Natural SciencesChemical EngineeringChemistryCatalysisInorganic ChemistryReaction EngineeringCatalytic MaterialsCatalytic Reaction EngineeringCatalytic Reaction KineticsCatalytic Reactor DesignFluidized Bed ReactorsSupported CatalystsCatalyst SelectivityCatalytic Fluidized Bed ReactorsCatalytic Selectivity ControlConsecutive ReactionsFluidized Bed CatalysisOxidative CouplingOxidative Coupling ReactionsSteam Reforming
Abstract Oxidative coupling of methane over a La 2 O 3 /CaO catalyst was investigated in laboratory‐scale fluidized‐bed reactors (ID = 5 and 7 cm) in the following range of reaction conditions: T = 700 – 880°C, P = 41 – 72 kPa and P = 6 – 29 kPa. The maximum C 2+ selectivity and yield amounted to 73.8% ( T = 800°C, X = 13.1%, Y = 9.7%) and 16.0% ( T = 840°C, X = 34.0%, S = 47.2%), respectively. Axial gas concentration profiles revealed that C 2+ selectivity was not only influenced by oxidative consecutive reactions, but also by steam reforming of ethylene. When diluting the catalytic bed ( m cat = 145 g) with quartz ( m = 200 and 400 g), a slight decrease of the selectivity (1–2%) was observed. The dilution of the feed gas with nitrogen only led to only a small increase (< 2%) of the C 2+ selectivity.
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