ZSM-5 crystals were grown by hydrothermal synthesis on glass fiber wool composed of silicate and CaO-MgO. The growth behavior of the zeolites was studied under various conditions, including using different Si/Al ratios and concentrations of the template. One-micrometer-tablet-shaped zeolites were grown uniformly using an Si/Al ratio of 60 (condition ZEO-B), and they showed strong bonding to the glass surface. In addition, the presence of Lewis and <TEX>Brnsted</TEX> acid sites was confirmed in zeolites grown under low template condition ZEO-D. It is expected that a zeolite layer formed on the surface of glass wool works as a stable acid catalyst.
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Lee et al. (2016) studied this question.
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