Effect of cobalt supported on meso-macro porous hydrotalcite in Fischer-Trospch Synthesis

Title
Effect of cobalt supported on meso-macro porous hydrotalcite in Fischer-Trospch Synthesis
Authors
문동주박지인양은혁홍기훈정재선Janardhan L. Hodala
Issue Date
2016-10
Publisher
RSC advances
Citation
VOL 6, NO 106-104293
Abstract
Hydrotalcite based cobalt catalysts were prepared by a slurry precipitation method, followed by a slurry impregnation method. The prepared supports and catalysts were characterized by N2 physisorption, mercury intrusion, chemisorption, TPR, TPD, SEM, TEM, TGA, DTA, and XRD techniques. Their catalytic performance for FTS was evaluated in a fixed-bed reactor with a H2/CO molar ratio of 2, reaction temperature of 240 °C, and reaction pressure of 25 bar. The incorporation of alumina and kaolin enlarged the inter void between hydrotalcite clusters, which resulted in macro porosity. The cobalt catalyst supported on a bimodal pore structure induced by kaolin showed a more stabilized catalytic activity and better heavy hydrocarbon selectivity in the FTS reaction when compared to other catalysts. The catalytic performance of the prepared catalyst depended on the cobalt reducibility and diffusion efficiency, which were determined by the cobalt particle size and porosity.
URI
http://pubs.kist.re.kr/handle/123456789/64671
ISSN
2046-2069
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KIST Publication > Article
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