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Suffocating phenols: A catalyst system consisting of Pd/C and HZSM-5 shows an extremely high selectivity in removing oxygen-containing groups (hydroxyl, methoxy, ketone, alkylOaryl, and arylOaryl) in lignin-derived substituted phenolic monomers and dimers through a metal-acid catalyzed cascade cleavage of CO bonds in phenolic dimers and the integrated hydrogenation and dehydration reactions in water at 473 K.
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Zhao et al. (2011) studied this question.
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