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ZrMn Oxides for Aqueous‐Phase Ketonization of Acetic Acid: Effect of Crystal and Porosity
Author(s) -
Wu Kejing,
Yang Mingde,
Hu Husheng,
Liang Junmei,
Wu Yulong
Publication year - 2018
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201800114
Subject(s) - acetic acid , crystallinity , aqueous solution , crystallite , tetragonal crystal system , chemistry , porosity , inorganic chemistry , catalysis , specific surface area , solvent , carbonization , chemical engineering , bet theory , phase (matter) , nuclear chemistry , organic chemistry , adsorption , crystallography , engineering
Aqueous‐phase ketonization of bio‐based acetic acid is important to improve the conversion efficiency of biomass resources. In this study, ZrMn mixed oxides (ZrMnO x ) with high aqueous‐phase ketonization activity are synthetized through a carbonization/oxidation method (COM) and solvothermal method (STM). The results show that ZrMnO x prepared by COM possesses tetragonal ZrO 2 , and hausmannite Mn 3 O 4 is observed only at a high oxidation temperature of 750 °C. Low‐temperature and long oxidation results in decreased crystallinity and crystallite size, which is related to highly dispersed Mn n + species. The catalysts with improved acid sites possess high ketonization activity. Surface areas and pore size of ZrMnO x synthetized by STM are controlled by the solvents for thermal treatment. Compared with water as solvent, ethanol increases the surface area and pore size, resulting in high ketonization activity.