Hydrogen production via surrogate biomass gasification using 5% Ni and low loading of lanthanum co-impregnated on fluidizable γ-alumina catalysts
| Autor: | Adriana Sanchez Enríquez, Daniel Gibran González Castañeda, Ivan Cruz Reyes, Alan Ruben Calzada Hernandez, Benito Serrano Rosales |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Hydrogen 020209 energy General Chemical Engineering chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Catalysis γ alumina Cerium Nickel chemistry Chemical engineering 0202 electrical engineering electronic engineering information engineering Lanthanum Biomass gasification 0210 nano-technology Hydrogen production |
| Zdroj: | International Journal of Chemical Reactor Engineering. 20:17-33 |
| ISSN: | 1542-6580 |
| DOI: | 10.1515/ijcre-2020-0186 |
| Popis: | Nickel on alumina support offers opportunity for gasification of biomass for hydrogen production. In a recent contribution from our research team, (González Castañeda, D. G., et al. 2019) showed that cerium or lanthanum co-impregnation at 2 wt% with nickel may have a favorable effect for biomass catalytic gasification. However, and given an observed influence of lanthanum on the formation of small Ni crystallite sizes, five Ni/γ-Al2O3 based fluidizable La promoted catalysts were studied. Nickel-alumina catalysts promotion was effected varying La in the 0.5 and 1.0 wt% range. Once impregnation precursors loaded, they were reduced at 480 °C via an activation step. Catalysts were characterized using BET, XRD, AA, TPR, TPD, H2-chemisorption, TEM-EDX and FTIR. Catalyst performance was established in a fluidized CREC Riser Simulator, using: a) glucose as surrogate biomass, b) 600 °C, c) steam/biomass (S/B) ratio of 1, d) catalyst /biomass (C/B) ratio of 3.2 and e) 20 s reaction time. Data obtained was analyzed using an ANOVA statistical data analysis package with the 5 wt% Ni and 0.5–1 wt% La and Ce on γ-Al2O3 catalysts, prepared using a pH of 1 of impregnating solution were the best yielding 0.53–0.56 hydrogen molar fractions. These catalysts also gave a 39% reduced coke, and this while compared with the coke formed on the 2% Ce – 5 wt%Ni/γ-Al2O3 (González Castañeda, D. G., et al. 2019). This promising performance was assigned to the dominant NH3-TPD medium acidity, the high catalyst specific surface (∼140 m2/g), and the good 9% metal dispersion with 9–10 nm nickel crystallites. |
| Databáze: | OpenAIRE |
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