[article]
| Titre : |
Toluene decomposition in the presence of hydrogen on tungsten-based catalysts |
| Type de document : |
texte imprimé |
| Auteurs : |
Sourabh S. Pansare, Auteur ; James G. GoodwinJr., Auteur ; Santosh Gangwal, Auteur |
| Année de publication : |
2008 |
| Article en page(s) : |
p. 4077–4085 |
| Note générale : |
Bibliogr. p. 4084-4085 |
| Langues : |
Anglais (eng) |
| Mots-clés : |
Toluene Tungstated zirconia Tungsten carbide |
| Résumé : |
Removal of NH3, tars, and H2S from biomass gasification gas represents a significant step in the commercial use of biomass gasification as a source of hydrogen, syngas, and electricity. This paper reports the results of an investigation into the use of W-based catalysts [tungsten carbide (WC), tungstated zirconia (WZ), and platinum supported on tungstated zirconia (PtWZ)] for catalytic tar removal. In this study, toluene was used as a model compound for tars. In the case of WZ, the effect of calcination temperature on the activity of toluene decomposition was also investigated. The toluene decomposition reaction was conducted at 1 atm, in the temperature range of 300−800 °C, and in the presence of 10% H2. CH4 and benzene were the only detectable products of toluene decomposition on all the catalysts. Incorporation of 5 wt % Pt with WZ was found to give the most effective catalyst considering initial rates of product formation. WC, WZ, and PtWZ each showed an initial partial deactivation for both CH4 and benzene formation due to coke deposition on active sites. Pt incorporation had a significant effect on the steady-state activity of WZ for toluene decomposition at temperatures below 600 °C; however, at temperatures above 700 °C, the effect was nullified. All W-based catalysts showed comparable performance to that of a commercial cracking catalyst (ultra-stable Y zeolite) above 700 °C. |
| En ligne : |
http://pubs.acs.org/doi/abs/10.1021/ie8002864 |
in Industrial & engineering chemistry research > Vol. 47 n°12 (Juin 2008) . - p. 4077–4085
[article] Toluene decomposition in the presence of hydrogen on tungsten-based catalysts [texte imprimé] / Sourabh S. Pansare, Auteur ; James G. GoodwinJr., Auteur ; Santosh Gangwal, Auteur . - 2008 . - p. 4077–4085. Bibliogr. p. 4084-4085 Langues : Anglais ( eng) in Industrial & engineering chemistry research > Vol. 47 n°12 (Juin 2008) . - p. 4077–4085
| Mots-clés : |
Toluene Tungstated zirconia Tungsten carbide |
| Résumé : |
Removal of NH3, tars, and H2S from biomass gasification gas represents a significant step in the commercial use of biomass gasification as a source of hydrogen, syngas, and electricity. This paper reports the results of an investigation into the use of W-based catalysts [tungsten carbide (WC), tungstated zirconia (WZ), and platinum supported on tungstated zirconia (PtWZ)] for catalytic tar removal. In this study, toluene was used as a model compound for tars. In the case of WZ, the effect of calcination temperature on the activity of toluene decomposition was also investigated. The toluene decomposition reaction was conducted at 1 atm, in the temperature range of 300−800 °C, and in the presence of 10% H2. CH4 and benzene were the only detectable products of toluene decomposition on all the catalysts. Incorporation of 5 wt % Pt with WZ was found to give the most effective catalyst considering initial rates of product formation. WC, WZ, and PtWZ each showed an initial partial deactivation for both CH4 and benzene formation due to coke deposition on active sites. Pt incorporation had a significant effect on the steady-state activity of WZ for toluene decomposition at temperatures below 600 °C; however, at temperatures above 700 °C, the effect was nullified. All W-based catalysts showed comparable performance to that of a commercial cracking catalyst (ultra-stable Y zeolite) above 700 °C. |
| En ligne : |
http://pubs.acs.org/doi/abs/10.1021/ie8002864 |
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Ajouter le résultat dans votre panier Faire une suggestion Affiner la rechercheSimultaneous ammonia and toluene decomposition on tungsten-based catalysts for hot gas cleanup in Industrial & engineering chemistry research, Vol. 47 n°22 (Novembre 2008)
