File Download

There are no files associated with this item.

  • Find it @ UNIST can give you direct access to the published full text of this article. (UNISTARs only)
Related Researcher

이재성

Lee, Jae Sung
Eco-friendly Catalysis & Energy Lab.
Read More

Views & Downloads

Detailed Information

Cited time in webofscience Cited time in scopus
Metadata Downloads

Transesterification of dimethylcarbonate and phenol over silica supported TiO(2) and Ti-MCM 41 catalysts: Structure insensitivity

Alternative Title
Transesterification of dimethylcarbonate and phenol over silica supported TiO2 and Ti-MCM 41 catalysts: Structure insensitivity
Author(s)
Joshi, Upendra A.Choi, Sun HeeJang, Jum SukLee, Jae Sung
Issued Date
2008-06
DOI
10.1007/s10562-008-9403-y
URI
https://scholarworks.unist.ac.kr/handle/201301/13372
Fulltext
http://download.springer.com/static/pdf/844/art%253A10.1007%252Fs10562-008-9403-y.pdf?originUrl=http%3A%2F%2Flink.springer.com%2Farticle%2F10.1007%2Fs10562-008-9403-y&token2=exp=1438917082~acl=%2Fstatic%2Fpdf%2F844%2Fart%25253A10.1007%25252Fs10562-008-9403-y.pdf%3ForiginUrl%3Dhttp%253A%252F%252Flink.springer.com%252Farticle%252F10.1007%252Fs10562-008-9403-y*~hmac=2b1dd51c618a5d4a98b9031648b7767dd020d958cdb15d263e4a7f480685b833
Citation
CATALYSIS LETTERS, v.123, no.1-2, pp.115 - 122
Abstract
Silica-supported titanium dioxide (TiO(2)/SiO(2)) and Ti-MCM 41 catalysts have been used for transesterification of dimethylcarbonate (DMC) and phenol to methylphenylcarbonate (MPC). The structure and the chemical state of titanium species in TiO(2)/SiO(2) and Ti-MCM 41 have been investigated by means of X-ray diffraction (XRD), X-ray absorption near edge structure (XANES) for Ti K-edge and X-ray photoelectron spectroscopy (XPS). To understand the role of pore size on the activity of catalysts, different pore size silica supports (Q-series) were utilized in TiO(2)/SiO(2) catalysts. Similarly, to understand the effect of Ti symmetry on the activity of catalysts, Ti-MCM 41 was used with different Ti-loadings. It was observed that the Ti surface area was an only important factor to achieve highest activity. In case of Ti-MCM 41 catalysts, as the Ti-loading increased octahedral symmetry increased and tetrahedral symmetry decreased. But, turnover rates based on the surface Ti atoms were independent of the Ti symmetry. They are also similar to those obtained for TiO(2)/SiO(2) catalysts. Showing that transesterification of DMC and phenol over Ti-based catalysts is a structure insensitive reaction
Publisher
SPRINGER
ISSN
1011-372X
Keyword (Author)
transesterification of dimethylcarbonatephenolTiO(2)/SiO(2)Ti MCM 41linear combination of XANESstructure insensitivity
Keyword
SI BINARY OXIDESGAS-PHASE TRANSESTERIFICATIONRAY ABSORPTION-SPECTROSCOPYDIPHENYL CARBONATEDIMETHYL CARBONATEQUANTITATIVE-ANALYSISLINEAR COMBINATIONO-SIXANESPHOSGENE

qrcode

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.