Synthesis of nanocarbons via ethanol dry reforming over a carbon steel catalyst

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• 作者：Jasmin Blanchard ; Hicham Oudghiri-Hassani ; Nicolas Abatzoglou ; Sepideh Jankhah ; Franç ; ois Gitzhofer
• 关键词：Dry reforming ; Ethanol ; Catalyst ; Steel ; CO₂ sequestration ; Carbon nanofilaments (CNF) ; FEG ; XRD
• 刊名：Chemical Engineering Journal
• 出版年：2008
• 出版时间：15 September 2008
• 年：2008
• 卷：143
• 期：1-3
• 页码：186-194
• 全文大小：1611 K

文摘

In previous publications it was shown that carbon steel is an effective ethanol dry reforming catalyst, if carbon nanofilaments (CNF) constitute a desired product of the reaction. The objective of the present work was to investigate this catalytic reaction step and to present data on CNF and other reaction products as a function of catalyst nature and preparation as well as of experimental conditions.

The methodology included 2 experimental set-ups: a bench-scale, fixed-bed reactor equipped with an on-line gas chromatograph for exit gas analysis and a differential reactor. Field emission gun scanning electron microscopy and X-ray diffraction analyses were used to characterize catalyst surface and CNF.

The results showed that the formation of micro- and nanoparticles of magnetite on the steel surface was a necessary step for the activation and enhancement of its catalytic properties. The so-activated catalyst reformed ethanol with CO₂ into H₂, CO, H₂O and CNF, via the formation of iron carbide particles (Fe₃C). These iron carbide particles were derived from magnetite particles, via reduction and carbon sequestration reactions, and were the basis for catalytic CNF production.