Nickel and Iron Biocarbon Catalysts for Water-Gas Shift Reaction - IMT Mines Albi-Carmaux
Article Dans Une Revue Waste and Biomass Valorization Année : 2024

Nickel and Iron Biocarbon Catalysts for Water-Gas Shift Reaction

Résumé

Biocarbon catalysts for water-gas shift (WGS) reaction were prepared from pyrolyzed fern (F) impregnated with iron (Fe) and nickel (Ni) salts. They were tested in a fixed-bed reactor from 180 °C to 400 °C with variable steam to carbon monoxide (S/CO) ratio (1.4 to 20.7) and compared to rust. CO conversion was mostly below 10% and favored by increasing temperature and steam partial pressure relative to WGS kinetics. Ni-biocarbon catalysts were more active for WGS due to their lower temperature activity, according to their reducibility and inherent metals which improved electronic properties. WGS selectivity was generally above 95%, reflecting WGS predominance over methanation. FNiFe-B (impregnated before pyrolysis) was the most performant catalyst (10.3% conversion, 99.7% selectivity, 280 °C). Maximal rust conversion was 6.9% at 280 °C, compared to 20% at 300 °C in the literature. Catalyst activation energy and pre-exponential factor of 92.1 kJ/mol and 2.2 × 108 respectively were determined, and comparable to literature (up to 130 kJ/mol; 5.8 × 1010). Low temperature activity provided by Ni combined with Fe and fern-inherent metals’ co-catalytic effect was reflected in the high WGS performance by FNiFe-B with its associated kinetic parameters (59.5 kJ/mol; 5.6 × 105).
Fichier sous embargo
Fichier sous embargo
0 0 29
Année Mois Jours
Avant la publication
vendredi 31 janvier 2025
Fichier sous embargo
vendredi 31 janvier 2025
Connectez-vous pour demander l'accès au fichier

Dates et versions

hal-04669645 , version 1 (17-09-2024)

Identifiants

Citer

Graul Théodore, González Martínez María, Nzihou Ange. Nickel and Iron Biocarbon Catalysts for Water-Gas Shift Reaction. Waste and Biomass Valorization, In press, ⟨10.1007/s12649-024-02673-3⟩. ⟨hal-04669645⟩
29 Consultations
1 Téléchargements

Altmetric

Partager

More