Abstract
To simplify a variety of terminologies, layered catalysts are exemplified as multicomponent catalysts that possess important structural features spatially resolved at different length scales. The purpose of this contribution is to describe and translate recently developed accomplishments of a versatile procedure that coats a zeolite shell around a catalyst core to achieve size selective steam reforming of various size hydrocarbons (i.e., methane and toluene) to the low temperature reforming regime. Previous results on the role of layer thickness and shell acidity are reviewed and augmented by spectroscopic adsorption of pyridine as a probe molecule. The results demonstrate that methane reforming also occurs more readily due to regulation of transport rates at low temperature through the shell despite toluene reforming being thermodynamically favored. Thus, this study provides a key step toward enabling layered catalysts for intensified methane conversion processes.
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