Asymmetric ceramic hollow fibres: New micro-supports for gas-phase catalytic reactions

作者：Garcia Garcia F R; Rahman M A; King**ury B F K; Li K^*

来源：Applied Catalysis A: General , 2011, 393(1-2): 71-77.

DOI：10.1016/j.apcata.2010.11.028

• Al(2)O(3) hollow fibres
• Catalytic hollow fibre micro-reactor
• Sol-gel Pechini method
• The WGS reaction

Al(2)O(3) hollow fibres fabricated by phase-inversion, followed by sintering at different temperatures (1350, 1400 and 1450 degrees C) have been employed for the further development of a novel catalytic hollow fibre micro-reactor (CHFMR). After depositing with a 10%CuO/CeO(2) catalyst, the catalytic activity of the CHFMR has been compared with that of a conventional fixed-bed reactor using water gas shift (WGS) as a sample reaction. The deposition of catalyst into the finger-like voids was carried out using the sol-gel Pechini method. The Al(2)O(3) hollow fibres were characterized before and after catalyst deposition by BET surface area analysis, Hg porosimetry and SEM-EDS. The catalytic activity tests were performed at P=1 atm and between T=200 and 400 degrees C. It has been observed that the dispersion of the 10%CuO/CeO(2) catalyst within the Al(2)O(3) hollow fibres is strongly dependent on the physical and chemical properties of the fibre surface, which are determined by the sintering temperature. Finally, an increase of 20% in the CO conversion of the WGS reaction was observed for the CHFMR when compared with a conventional fixed-bed reactor, since the finger like structure of Al(2)O(3) hollow fibres (D(p)=10 mu m) acts as a micro-reactor and improves the heat and mass transfer, and the mixing of gases during the reaction.

• 出版日期2011-2-15