Abstract
AbstractThe optimal composition of high-performance catalyst Ni-MxOy/Al2O3 (MxOy: Na2O, K2O, La2O3, CeO2, NiO) on structured ceramic carriers (cordierite) is used for the reforming processes of methane and C2-C4-alkanes (oxygen, steam, carbon) with obtaining of hydrogen (synthesis gas, including with a given ratio of H2/CO). The nature of the effect of modifying additives – oxides of alkaline, rare earth elements influences on the selectivity, yield of target products (hydrogen, synthesis gas), resistance to sulfur-containing compounds and loss of activity due to carbon accumulation. Structured catalysts on fibrous carriers with an efficient electric heater built into the honeycomb blocks have been developed. Laboratory studies of the mechanism and kinetics of methane vapor reforming in an integrated (gradient less) reactor have been carried out. The kinetic equations of steam conversion reactions as well as “water shear” reactions are derived. The values of the kinetic constants of reforming and activation energies in kinetic equations of the Langmuir-Hinshelwood type are established. The obtained numerical data are recommended for calculations of processes and reactors of reforming by methods of mathematical modeling.KeywordsMetal oxide-nickel-aluminum catalystsCordieriteMineral fibersBlock cellular structures with electric heaterVapor-carbonic-oxygen reformingHydrogen; Synthesis gas
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