Highly durable Pt-supported Nb2O5-SiO2 aerogel catalysts in the aqueous-phas hydrodeoxygenation of 1-propanol

Title
Highly durable Pt-supported Nb2O5-SiO2 aerogel catalysts in the aqueous-phas hydrodeoxygenation of 1-propanol
Authors
류지혜서영웅김성민최재욱하정명안동준서동진
Keywords
biomass; catalyst; hydrodeoxygenation; aerogel
Issue Date
2012-10
Publisher
2012 한국화학공학회 추계학술대회
Citation
VOL 18, NO 2, 2448-2448
Abstract
Pt catalysts supported on crystalline Nb2O5•xH2O, and amorphous SiO2, Al2O3 and Nb2O5 aerogels were tested for their activity in the aqueous phase hydrodeoxygenation (APHDO) of 1-PrOH at 230 °C and 35 bar. The catalysts supported on amorphous SiO2, Al2O3, Nb2O5 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. Thus, Pt/Nb2O5– Al2O3 and Pt/Nb2O5–SiO2 aerogels were prepared and tested; however, the former catalyst experienced the crystallization into TT–Nb2O5 and boehmite under the reaction condition. In contrast, Pt/Nb2O5–SiO2 aerogels with different Nb/(Nb+Si) ratios were found to retain X-ray amorphous and porous structure. Also, their acid site densities were negligibly changed during the reaction. In terms of the catalytic performance, Pt/Nb2O5–SiO2 aerogel catalysts exhibited the similar conversion around 50% up to 24 h and the molar propane/ethane ratio increased to about 1.0 with the acid site density.
URI
http://pubs.kist.re.kr/handle/201004/44673
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KIST Publication > Conference Paper
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