Abstract
The aqueous-phase hydrodeoxygenation (APHDO) of 1-propanol at 230 °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 °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/Nb 2O5-Al2O3 aerogel also suffered from the same crystallization behavior. In contrast, Pt/Nb2O 5-SiO2 aerogels with different Nb/(Nb + Si) ratios maintained a good catalytic performance for prolonged reaction periods. Through characterizations of spent catalysts, Nb2O5-SiO 2 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/Nb2O 5-SiO2 aerogel catalysts are highly active in the presence of water.
Original language | English |
---|---|
Pages (from-to) | 40-47 |
Number of pages | 8 |
Journal | Catalysis Communications |
Volume | 29 |
DOIs | |
Publication status | Published - 2012 Dec 5 |
Bibliographical note
Funding Information:This research was financially supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology of Korea (Grant no. 2012R1A1A1007866 ) and Industrial Source Technology Development Program of the Ministry of Knowledge and Economy (MKE) of Korea (Grant no. 2012‐10042591 ).
Keywords
- 1-Propanol
- Aerogel
- Aqueous-phase processing
- Hydrodeoxygenation
- Pt/Nb O-SiO
ASJC Scopus subject areas
- Catalysis
- General Chemistry
- Process Chemistry and Technology