Highly durable Pt-supported niobia-silica aerogel catalysts in the aqueous-phase hydrodeoxygenation of 1-propanol
- Title
- Highly durable Pt-supported niobia-silica aerogel catalysts in the aqueous-phase hydrodeoxygenation of 1-propanol
- Author
- 서영웅
- Keywords
- 1-Propanol; Aqueous-phase processing; Hydrodeoxygenation; Aerogel; Pt/Nb2O5-SiO2
- Issue Date
- 2012-12
- Publisher
- Elsevier Science B.V., Amsterdam.
- Citation
- Catalysis Communications, 2012, 29, P.40-47, 8P.
- Abstract
- The aqueous-phase hydrodeoxygenation (APHDO) of 1-propanol at 230 degrees C and 35 bar was studied over 1 wt.% Pt catalysts supported on several metal oxides. Pt catalysts supported on amorphous silica, alumina and niobia aerogels, and crystalline niobic acid calcined at 500 degrees C showed low activities or deactivation. Under the APHDO condition, these supports experienced a structure transformation to crystalline quartz, boehmite and niobia TT phase. Pt/Nb2O5-Al2O3 aerogel also suffered from the same crystallization behavior. In contrast, Pt/Nb2O5-SiO2 aerogels with different Nb/(Nb + Si) ratios maintained a good catalytic performance for prolonged reaction periods. Through characterizations of spent catalysts, Nb2O5-SiO2 aerogels were found to retain X-ray amorphous and porous structure. Also, their acid site densities were negligibly changed during the reaction. The catalysts with the Nb/(Nb + Si) ratio of 0.500 and 0.575 reached the molar propane/ethane ratio of about 1.0, indicating that Pt/Nb2O5-SiO2 aerogel catalysts are highly active in the presence of water. (C) 2012 Elsevier B.V. All rights reserved.
- URI
- https://www.sciencedirect.com/science/article/pii/S1566736712003615?via%3Dihubhttp://hdl.handle.net/20.500.11754/50830
- ISSN
- 1566-7367
- DOI
- 10.1016/j.catcom.2012.09.022
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
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