TY - JOUR
T1 - Synthesis of higher alcohols by Fischer-Tropsch synthesis over alkali metal-modified cobalt catalysts
AU - Ishida, Tamao
AU - Yanagihara, Tatsuya
AU - Liu, Xiaohao
AU - Ohashi, Hironori
AU - Hamasaki, Akiyuki
AU - Honma, Tetsuo
AU - Oji, Hiroshi
AU - Yokoyama, Takushi
AU - Tokunaga, Makoto
N1 - Funding Information:
This work was financially supported by a Grant-in-Aid for Global COE Program, “Science for Future Molecular Systems” from the Ministry of Education, Culture, Sports, Science and Technology of Japan . We thank Prof. M. Haruta and Assoc. Prof. T. Takei of Tokyo Metropolitan University who allowed us to use the CO 2 -TPD apparatus. The synchrotron radiation experiments were performed at the BL14B2 beam line at SPring-8 with the approval of JASRI (proposal No. 2010B1006) and at Kyushu University Beamline of SAGA-LS/BL06 with the proposal No. 2012IIIK009. The HAADF-STEM observations were performed at the research laboratory for high vacuum electron microscopy (HVEM) at Kyushu University.
PY - 2013/5/10
Y1 - 2013/5/10
N2 - Alkali metal-modified unsupported and supported cobalt catalysts worked efficiently in the Fischer-Tropsch (FT) synthesis for the production of higher alcohols in a batch slurry-phase reactor. Sodium-modified Co catalysts exhibited the highest catalytic performance in terms of catalytic activity and higher alcohol selectivities compared to other alkali metal-modified Co catalysts: they also gave appreciable amounts of higher alcohols with more than four carbon atoms (C5+ alcohols) as much as 77% of the total alcohol distribution. According to the characterization of the catalysts using XRD, TEM, XPS, XAFS, and CO2-TPD, the effect of Na was suggested as follows: (i) a decrease in the size of Co nanoparticles, (ii) a decrease in the reducibility of Co(II) to Co(0), and (iii) an increase in surface basicity. These factors enable the production of higher alcohols with high selectivities at high CO conversions.
AB - Alkali metal-modified unsupported and supported cobalt catalysts worked efficiently in the Fischer-Tropsch (FT) synthesis for the production of higher alcohols in a batch slurry-phase reactor. Sodium-modified Co catalysts exhibited the highest catalytic performance in terms of catalytic activity and higher alcohol selectivities compared to other alkali metal-modified Co catalysts: they also gave appreciable amounts of higher alcohols with more than four carbon atoms (C5+ alcohols) as much as 77% of the total alcohol distribution. According to the characterization of the catalysts using XRD, TEM, XPS, XAFS, and CO2-TPD, the effect of Na was suggested as follows: (i) a decrease in the size of Co nanoparticles, (ii) a decrease in the reducibility of Co(II) to Co(0), and (iii) an increase in surface basicity. These factors enable the production of higher alcohols with high selectivities at high CO conversions.
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U2 - 10.1016/j.apcata.2013.03.042
DO - 10.1016/j.apcata.2013.03.042
M3 - Article
AN - SCOPUS:84877076369
SN - 0926-860X
VL - 458
SP - 145
EP - 154
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
ER -