Issue 4, 2013

Effect of tetrahedral aluminum on the catalytic performance of Al–SBA-15 supported Ru catalysts in Fischer–Tropsch synthesis

Abstract

Al–SBA-15 supports were synthesized by both direct synthesis and post-synthesis grafting methods. The two synthetic methods lead to different tetrahedral Al sites; Al(x)-D samples prepared by direct synthesis exhibit more tetrahedral Al sites than Al(x)-P supports prepared by the post-synthesis grafting method as determined by 27Al magic-angle-spinning NMR (27Al MAS NMR). The temperature-programmed desorption of ammonia (NH3-TPD) result shows that the material with more tetrahedral Al sites has higher acidity. The Al–SBA-15 material supported ruthenium catalysts were applied in Fischer–Tropsch synthesis (FTS). The tetrahedral Al content is shown to promote the dispersion of ruthenium in the supported catalysts, which is illustrated by powder X-ray diffraction (XRD), nitrogen adsorption–desorption and hydrogen temperature programmed desorption (H2-TPD). The effect of tetrahedral Al on the catalytic selectivity was discussed. The selectivity of long chain hydrocarbons (C11+) is lower for the catalyst with higher content of tetrahedral Al sites in FTS.

Graphical abstract: Effect of tetrahedral aluminum on the catalytic performance of Al–SBA-15 supported Ru catalysts in Fischer–Tropsch synthesis

Article information

Article type
Paper
Submitted
22 Oct 2012
Accepted
14 Dec 2012
First published
19 Dec 2012

Catal. Sci. Technol., 2013,3, 1063-1068

Effect of tetrahedral aluminum on the catalytic performance of Al–SBA-15 supported Ru catalysts in Fischer–Tropsch synthesis

S. Chen, J. Li, Y. Zhang, Y. Zhao and J. Hong, Catal. Sci. Technol., 2013, 3, 1063 DOI: 10.1039/C2CY20716H

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