Journal
APPLIED CATALYSIS A-GENERAL
Volume 276, Issue 1-2, Pages 95-102Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcata.2004.07.044
Keywords
nitrobenzene hydrogenation; para-aminophenol; Bamberger rearrangement; Bi-functional catalyst; platinum; H-ZSM-5
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A single-step reaction of nitrobenzene into para-aminophenol was carried out in the gas phase using metal-supported zeolite as a bifunctional catalyst. A significant amount of para-aminophenol was produced with aniline and ortho-aminophenol without using any environmentally undesirable liquid acid. For the selective formation of para-aminophenol, Pt supported on H-ZSM-5 was the best combination of metal and acid catalysts. The selectivity to para-aminophenol depended greatly on the Al concentration of H-ZSM-5; that is, HZSM-5 with intermediate Al concentration gave the highest selectivity. Pt particles on H-ZSM-5 were characterized by the measurements of adsorbed CO, TEM and IR spectra. (C) 2004 Elsevier B.V. All rights reserved.
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