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Use of nickel oxide as a catalyst for tar elimination in a chemical-looping reforming reactor operated with biomass producer gas / Nicolas Berguerand in Industrial & engineering chemistry research, Vol. 51 N° 51 (Décembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 51 (Décembre 2012) . - pp. 16610–16616 Titre : Use of nickel oxide as a catalyst for tar elimination in a chemical-looping reforming reactor operated with biomass producer gas Type de document : texte imprimé Auteurs : Nicolas Berguerand, Auteur ; Fredrik Lind, Auteur ; Mikael Israelsson, Auteur Année de publication : 2012 Article en page(s) : pp. 16610–16616 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Nickel  Oxide  Catalyst Résumé : A secondary tar-cleaning process based on chemical-looping reforming (CLR) was investigated for upgrading biomass producer gas, derived from the Chalmers University of Technology 2-4 MW indirect gasifier. The experiments were conducted in a bench-scale CLR reactor using a manufactured nickel oxide (NiO) catalyst. Although Ni is a well-documented and efficient steam-reforming catalyst, it is susceptible to rapid deactivation under tar-rich conditions. The aim of this study was to explore the advantages of CLR as a gas-cleaning application, a process which offers continuous regeneration of the carbon deposits on catalysts. The tar-reforming performance of this Ni material and its influence on the gas composition and in particular its potential to increase the H2/CO ratio, were studied. The system was tested at reforming temperatures that ranged from 700 to 880 °C and at oxygen concentrations of 1.0% and 2.2% in the inlet feed to regenerator section. The results confirm the strong ability of the catalyst to reform tars. Higher process temperatures clearly promoted tar conversion, with 96% overall conversion at 880 °C (99% if benzene is excluded), as compared with 45% conversion at 700 °C. The hydrogen production was favored when temperature was raised, though, a maximum ratio of H2/CO of 2.2 was observed at 750 °C. Finally, no time-on-stream deactivation of the catalyst in the CLR was observed during the test, which lasted almost 7 h. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3028262?mi=sxp600&af=R&pageSize=20&searchT [...] [article] Use of nickel oxide as a catalyst for tar elimination in a chemical-looping reforming reactor operated with biomass producer gas [texte imprimé] / Nicolas Berguerand, Auteur ; Fredrik Lind, Auteur ; Mikael Israelsson, Auteur . - 2012 . - pp. 16610–16616. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 51 (Décembre 2012) . - pp. 16610–16616 Mots-clés : Nickel  Oxide  Catalyst Résumé : A secondary tar-cleaning process based on chemical-looping reforming (CLR) was investigated for upgrading biomass producer gas, derived from the Chalmers University of Technology 2-4 MW indirect gasifier. The experiments were conducted in a bench-scale CLR reactor using a manufactured nickel oxide (NiO) catalyst. Although Ni is a well-documented and efficient steam-reforming catalyst, it is susceptible to rapid deactivation under tar-rich conditions. The aim of this study was to explore the advantages of CLR as a gas-cleaning application, a process which offers continuous regeneration of the carbon deposits on catalysts. The tar-reforming performance of this Ni material and its influence on the gas composition and in particular its potential to increase the H2/CO ratio, were studied. The system was tested at reforming temperatures that ranged from 700 to 880 °C and at oxygen concentrations of 1.0% and 2.2% in the inlet feed to regenerator section. The results confirm the strong ability of the catalyst to reform tars. Higher process temperatures clearly promoted tar conversion, with 96% overall conversion at 880 °C (99% if benzene is excluded), as compared with 45% conversion at 700 °C. The hydrogen production was favored when temperature was raised, though, a maximum ratio of H2/CO of 2.2 was observed at 750 °C. Finally, no time-on-stream deactivation of the catalyst in the CLR was observed during the test, which lasted almost 7 h. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3028262?mi=sxp600&af=R&pageSize=20&searchT [...]