High-temperature desorbed H2 plays the crucial role in the hydrogenation reactions. Natural zeolite Escott supported Ni displays the highest activity among the catalysts due to the highest concentration of high-temperature desorbed H2.

Hydrodeoxygenation (HDO) of guaiacol over Ni supported on zeolites (HBeta, HZSM-5) with different Si/Al ratios and different metal loadings (2.3–23.4 wt%) was studied in order to elucidate the role of catalyst acidity and Ni structure in the HDO.

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