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  4. Catalytic conversion of model tars over carbon-supported Ni and Fe
 
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2018
  • Zeitschriftenaufsatz

Titel

Catalytic conversion of model tars over carbon-supported Ni and Fe

Abstract
Tar removal from gasification gases is a determinant step to guarantee the operational feasibility of gasification-to-chemicals/energy systems. This study aimed to develop novel carbon-supported catalysts for the elimination of tarry aromatics (toluene, naphthalene and benzene) from gasification gases. Effects of reaction temperature (700 < T < 900 °C) and catalyst nature (Fe0 and Ni0) on the activity were assessed by considering thermo-catalytic conversion and steam reforming, under a simulated gasification gas. The catalysts (Ni and Fe) and support (AC) were characterized by X-ray diffraction (XRD), N2 physisorption, thermogravimetric analysis (TGA), transmission electron microscopy (TEM) and compositional analyses. Both catalysts and support, presented a mesoporous-like texture with a considerable high surface area (690 < SBET < 743 m2/g). Furthermore, dispersion of the metal nanoparticles (active phase) was uniform as confirmed by TEM images. Results from activity tests suggest that Ni/AC has higher effectivity for converting tars than Fe/AC, as confirmed by the low apparent activation energies (34 < Eapp < 98 kJ/mol) for naphthalene and benzene conversion between 700 and 900 °C. The conversion was 100% above 850 °C; nevertheless; below 750 °C, a sharp reduction in benzene conversion was observed, which was attributed to reversible carbon deposition.
Author(s)
Arteaga-Pérez, Luis E.
University of Bio-Bio
Delgado, Aaron M.
University of Concepcion
Flores, Mauricio
Unit of Technical Development UDT
Olivera, Patricia
Unit of Technical Development UDT
Matschuk, Kimberley
Fraunhofer-Institut für Umwelt-, Sicherheits- und Energietechnik UMSICHT
Hamel, Christian
Fraunhofer-Institut für Umwelt-, Sicherheits- und Energietechnik UMSICHT
Schulzke, Tim
Fraunhofer-Institut für Umwelt-, Sicherheits- und Energietechnik UMSICHT
Jiménez, Romel
University of Concepcion
Zeitschrift
Catalysts
Project(s)
ComCatTar
Funder
Bundesministerium für Bildung und Forschung BMBF (Deutschland)
DOI
10.3390/catal8030119
File(s)
N-487676.pdf (1.69 MB)
Language
Englisch
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UMSICHT Oh
Tags
  • activated carbon

  • tar

  • catalytic gas upgradi...

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