A novel application of geopolymers for the catalytic cleaning of biomass-derived syngas is reported. Powders of metal oxides, i.e. Fe2O3 and Mn2O3, were dispersed in a geopolymer matrix, to produce composites in granular form for fixed bed application. Additionally, a mixed Fe/Mn composite was produced to explore the combined effects of the two oxides. The activity of the new catalysts was investigated in real gasification conditions by means of a double fixed bed reactor, at 700, 800 and 900 °C. All the systems promoted an appreciable tar removal, while FE-SEM and MIP analyses demonstrated their stability at the process conditions. The best performances were obtained using the composite including both Mn and Fe oxides, which registered a tar decomposition up to 86% compared to inert sand, and 50% compared to olivine. A reasonable explanation was provided by TPR and XRD analyses, which pointed out an easier reducibility of this system.

Geopolymer composites for the catalytic cleaning of tar in biomass-derived gas / R. Bendoni, F. Miccio, V. Medri, P. Benito, A. Vaccari, E.Landi. - In: RENEWABLE ENERGY. - ISSN 0960-1481. - STAMPA. - 131:(2019), pp. 1107-1116. [10.1016/j.renene.2018.08.067]

Geopolymer composites for the catalytic cleaning of tar in biomass-derived gas

P. Benito;A. Vaccari;
2019

Abstract

A novel application of geopolymers for the catalytic cleaning of biomass-derived syngas is reported. Powders of metal oxides, i.e. Fe2O3 and Mn2O3, were dispersed in a geopolymer matrix, to produce composites in granular form for fixed bed application. Additionally, a mixed Fe/Mn composite was produced to explore the combined effects of the two oxides. The activity of the new catalysts was investigated in real gasification conditions by means of a double fixed bed reactor, at 700, 800 and 900 °C. All the systems promoted an appreciable tar removal, while FE-SEM and MIP analyses demonstrated their stability at the process conditions. The best performances were obtained using the composite including both Mn and Fe oxides, which registered a tar decomposition up to 86% compared to inert sand, and 50% compared to olivine. A reasonable explanation was provided by TPR and XRD analyses, which pointed out an easier reducibility of this system.
2019
Geopolymer composites for the catalytic cleaning of tar in biomass-derived gas / R. Bendoni, F. Miccio, V. Medri, P. Benito, A. Vaccari, E.Landi. - In: RENEWABLE ENERGY. - ISSN 0960-1481. - STAMPA. - 131:(2019), pp. 1107-1116. [10.1016/j.renene.2018.08.067]
R. Bendoni, F. Miccio, V. Medri, P. Benito, A. Vaccari, E.Landi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/641252
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