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Characterization and Activity of MnO/γ‐Al 2 O 3 for Hydrogenation of Methyl Benzoate to Benzaldehyde
Author(s) -
Xu HuaLong,
Shen Wei,
Yang YongTai
Publication year - 2001
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20010190704
Subject(s) - benzaldehyde , chemistry , catalysis , x ray photoelectron spectroscopy , methyl benzoate , nuclear chemistry , dispersion (optics) , inorganic chemistry , organic chemistry , chemical engineering , physics , optics , engineering
The activities of a MnO/γ‐Al 2 O 3 catalyst for the selective reduction of methyl benzoate to benzaldehyde have been studied in a continuous flow reactor. Characterization of the catalyst has been conducted by XRD, XPS, NH 3 ‐TPD and TPD‐IR. XRD and XPS results revealed that the steady state catalyst is mainly MnO 2 /γ‐AlO 3 before reduction and MnO/γ‐Al 2 O 3 after reduction. Monolayer dispersion capacity obtained by XPS method is about w (Mn)11.3% TPD‐IR results revealed that there are only L acidic centers on the catalytic surface. NH 3 ‐TPD determinations have verified that the catalyst with a certain number of moderate strength acidic sites is advantageous to hydrogenation of methyl benzoate to benzaldehyde.