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Vapor phase synthesis of nanofibrous carbon materials from water-ethanol mixtures

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Abstract

We present a detailed study of the pyrolytic synthesis of nanofibrous carbon materials (NCMs) from ethanol and various water-ethanol mixtures on a nickel catalyst at temperatures from 400 to 700°C. In the synthesis from 96% ethanol, the initial deposition rate increases with temperature, but this is accompanied by a substantial decrease in catalyst life. The addition of water to the reaction system considerably increases the catalyst life. One possible reason for this is that water vapor prevents carbonization of the catalyst particles. At the same time, above 600°C the rate of NCM deposition from a 50% water-ethanol mixture is considerably slower. At 550°C and lower temperatures, the rate of NCM deposition from water-ethanol mixtures (based on ethanol consumption) changes insignificantly. Our results demonstrate that NCMs can be synthesized even from very dilute (down to 10 vol %) aqueous ethanol solutions. The participation of water vapor in chemical processes that take place in the reaction zone is discussed.

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Correspondence to A. N. Red’kin.

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Original Russian Text © A.N. Red’kin, V.A. Kipin, 2009, published in Neorganicheskie Materialy, 2009, vol. 45, no. 9, pp. 1057–1062.

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Red’kin, A.N., Kipin, V.A. Vapor phase synthesis of nanofibrous carbon materials from water-ethanol mixtures. Inorg Mater 45, 982–987 (2009). https://doi.org/10.1134/S0020168509090076

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