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A model for simulating reburning in semi-industrial scale has been developed. It consists of a recently developed reaction mechanism for reburning with C1 and C2 hydrocarbons, in combination with ideal reactor modeling and a simplified mixing approach. The reaction mechanism as well as the mixing model has been validated separately against experimental data from laboratory and pilot scale tests. Modeling predictions have been compared with experimental data from a number of pilot scale studies of gas reburning with good results. The large differences in reburn efficiency reported in different low-temperature pilot scale experiments are reconciled in terms of the different operating conditions used. The model has been used to assess the potential of the reburn process at low temperatures, and recommendations for process optimization are provided. Results show that the low-temperature gas reburn process has a significant potential for NO reduction and that both the reburn and burnout regions are important in process optimization.

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We demonstrated a proof-of-concept catalytic steam reforming flow reactor system heated only by supported magnetic nickel–cobalt nanoparticles in an oscillating magnetic field. The heat transfer was facilitated by the hysteresis heating in the nickel–cobalt nanoparticles alone. This produced a sufficient power input to equilibrate the reaction at above 780 °C with more than 98% conversion of methane. The high conversion of methane indicated that Co-rich nanoparticles with a high Curie temperature provide sufficient heat to enable the endothermic reaction, with the catalytic activity facilitated by the Ni content in the nanoparticles. The magnetic hysteresis losses obtained from temperature-dependent hysteresis measurements were found to correlate well with the heat generation in the system. The direct heating of the catalytic system provides a fast heat transfer and thereby overcomes the heat-transfer limitation of the industrial-scale steam reformer. This could consequently enable a more compact steam reformer design.

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