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Lee, Jae Sung
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Methanol synthesis over Pd/SiO2 with narrow Pd size distribution prepared by using MCM-41 as a support precursor

Alternative Title
Methanol synthesis over Pd/SiO2 with narrow Pd size distribution prepared by using MCM-41 as a support precursor
Author(s)
Lee, DeogseongJung, Gyu SungLee, Hyun ChulLee, Jae Sung
Issued Date
2006-02
DOI
10.1016/j.cattod.2005.10.062
URI
https://scholarworks.unist.ac.kr/handle/201301/12938
Fulltext
http://www.sciencedirect.com/science/article/pii/S0920586105008084
Citation
CATALYSIS TODAY, v.111, no.3-4, pp.373 - 378
Abstract
All silicious MCM-41 was investigated as a support or a support precursor for Pd/SiO2 and prepared catalysts were tested for methanol synthesis from CO and H-2. The methods of Pd loading on the MCM-41 were impregnation, seed impregnation and chemical vapor deposition (CVD). For both impregnations, most Pd existed outside of the pore as large particles, and only a small part of Pd was inserted into the pore of MCM-41 retaining the initial structure. On the contrary, in the catalyst prepared by CVD method, the MCM-41 structure was completely destroyed to become amorphous SiO2. Yet the average Pd particle size in this catalyst was smaller and its distribution was narrower than those of the catalysts prepared by impregnation methods. In the methanol synthesis from CO hydrogenation the catalyst prepared by CVD showed higher methanol selectivity than other MCM-41-derived catalysts. This result was considered to be due to the more uniform distribution of the Pd particle size. (c) 2005 Elsevier B.V. All rights reserved
Publisher
ELSEVIER SCIENCE BV
ISSN
0920-5861
Keyword (Author)
support precursorMCM-41chemical vapor depositionPd/SiO2methanol synthesis
Keyword
TITANIUM-SUBSTITUTED MCM-41MOLECULAR-SIEVESPALLADIUM CATALYSTSCARBON-DIOXIDESYNTHESIS GASHYDROGENATIONDEPOSITIONSTABILITYTEMPLATEALUMINA

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