Higher Acetone Conversion Obtained Over a TiO2–Pd Bifunctional Catalyst for Liquid-Phase Synthesis of Methyl Isobutyl Ketone: The Role of Al2O3 Support

Autor:	Yifan Zhu, Yingjie Hu, Hui Duan, Qianling Zhu, Yonghua Zhou, Baining Lin
Rok vydání:	2019
Předmět:	010405 organic chemistry General Chemistry 010402 general chemistry 01 natural sciences Catalysis 0104 chemical sciences Bifunctional catalyst Methyl isobutyl ketone chemistry.chemical_compound chemistry X-ray photoelectron spectroscopy Polymer chemistry Acetone Lewis acids and bases Selectivity Organometallic chemistry
Zdroj:	Catalysis Letters. 149:2636-2644
ISSN:	1572-879X 1011-372X
DOI:	10.1007/s10562-019-02861-0
Popis:	We reported a bifunctional catalyst TiO2/Al2O3 and Pd/Cor for one-pot liquid-phase synthesis of MIBK from acetone in this paper. The characterizations of FT-IR, Raman spectra, TEM, XPS, CO2-TPD, NH3-TPD, Py-IR and TGA spectra revealed that the TiO2/Al2O3 could possess more acid sites and especially Lewis acid sites due to the coexistence of TiO2 and Al2O3. So a higher acetone conversion 35–45% at 150 °C and 2.0 MPa pressure was achieved than ever reported for MIBK liquid-phase synthesis. In addition, the catalyst could keep active for at least 90 h on stream at 80–90% MIBK selectivity. The phenomenon of carbonaceous accumulation on TiO2/Al2O leaded to the deactivation of catalyst. Because of the coexistence of TiO2 and Al2O3. TiO2/Al2O3 could have more acid sites and especially Lewis acid sites. For liquid-phase synthesis of methyl isobutyl ketone, bifunctional catalyst TiO2/Al2O3&Pd/Cor showed higher acetone conversion.
Databáze:	OpenAIRE
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