Highly durable Pt-supported niobia-silica aerogel catalysts in the aqueous-phase hydrodeoxygenation of 1-propanol

Jihye Ryu, Sung Min Kim, Jae Wook Choi, Jeong Myeong Ha, Dong June Ahn, Dong Jin Suh, Young Woong Suh

Research output: Contribution to journalArticle

13 Citations (Scopus)

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 languageEnglish
Pages (from-to)40-47
Number of pages8
JournalCatalysis Communications
Volume29
DOIs
Publication statusPublished - 2012 Dec 5

Keywords

  • 1-Propanol
  • Aerogel
  • Aqueous-phase processing
  • Hydrodeoxygenation
  • Pt/Nb O-SiO

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Process Chemistry and Technology

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