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Lee, Jae Sung
Eco-friendly Catalysis and Energy Lab
Research Interests
  • Photocatalytic water splitting, artificial photosynthesis, fuel cells, heterogeneous catalysis


Gas phase transesterification of dimethylcarbonate and phenol over supported titanium dioxide

DC Field Value Language Kim, Won Bae ko Lee, Jae Sung ko 2015-07-27T05:05:50Z - 2015-07-24 ko 1999-07 -
dc.identifier.citation JOURNAL OF CATALYSIS, v.185, no.2, pp.307 - 313 ko
dc.identifier.issn 0021-9517 ko
dc.identifier.uri -
dc.identifier.uri ko
dc.description.abstract The transesterification of dimethylcarbonate and phenol has been studied in a continuous gas flow reactor at high temperatures which were found to be favorable thermodynamically for high yields of methylphenylcarbonate (MPC). Among various solid catalysts, TiO2/SiO2 showed the highest activity and selectivity for MPC. The structure and the chemical state of titanium species in TiO2/SiO2 have been investigated by means of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and X-ray absorption near edge structure (XANES) of Ti K-edge. It was observed that the titanium species was highly dispersed on silica. Below 10 wt% Ti loading the titanium phase was not observed by XRD, yet weak XRD peaks of anatase were detected at higher loadings. The Ti K-edge XANES spectra and XPS analyses indicated that Ti(IV) species in the form of a monolayer was dominant below 5 wt% Ti loadings and TiO2 of the anatase structure appeared at higher loadings. The amount of the surface Ti(IV) species measured by XPS increased with Ti loadings and was saturated above 10 wt% in the same manner as the selectivity to MPC changed with Ti loadings. This suggested that surface Ti(IV) species was directly responsible for the selective synthesis of MPC. The crystalline anatase TiO2 was also an active and selective catalyst for the transesterification, yet it contributed to decrease in activity by coking. (C) 1999 Academic Press ko
dc.description.statementofresponsibility close -
dc.language ENG ko
dc.subject transesterification ko
dc.subject gas phase ko
dc.subject dimethylcarbonate ko
dc.subject phenol ko
dc.subject TiO2/SiO2 ko
dc.subject XANES ko
dc.subject active phase ko
dc.title Gas phase transesterification of dimethylcarbonate and phenol over supported titanium dioxide ko
dc.title.alternative Gas phase transesterification of dimethylcarbonate and phenol over supported titanium dioxide ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-0000397483 ko
dc.identifier.wosid 000081766900007 ko
dc.type.rims ART ko
dc.description.wostc 58 *
dc.description.scopustc 62 * 2015-12-28 * 2015-11-04 *
dc.identifier.doi 10.1006/jcat.1999.2495 ko
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