Hierarchical mordenite catalysts were prepared by HF and NH4F etching. Materials' zirconia modification was performed by incipient wetness impregnation in order to vary surface acidity type and strength. XRD, N2 physisorption, solid-state NMR and UVâ??Vis spectroscopies were applied for characterization. Acidic properties of the obtained materials were investigated by TPD of adsorbed ammonia and FT-IR spectra of adsorbed pyridine. Catalytic performance was studied for the glycerol esterification with acetic acid. Zr increased reaction turnover activity compared to raw zeolite substrate due to abundant Brà¶nsted and Lewis moiety presence. The demonstrated biomass valorization processes to bio-based platform chemicals are of interest, as they employ biodiesel production waste.
» Author: Margarita Popova, Hristina Lazarova, Yuri Kalvachev, Totka Todorova, Ãgnes Szegedi, Pavletta Shestakova, Gregor Mali, Venkata D.B.C. Dasireddy, BlaÅ¾ Likozar
» Reference: Catalysis Communications, Volume 100
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