Título
Catalytic Steam Gasification of Glucose for Hydrogen Production Using Stable Based Ni on a γ–Alumina Fluidizable Catalyst
Autor
BENITO SERRANO ROSALES
Nivel de Acceso
Acceso Abierto
Resumen o descripción
Six different Ni-based fluidizable catalysts were synthesized using both incipient impregnation and co-
impregnation. Ni-based catalysts were also promoted with 2.0 wt% La or alternatively with 2 wt% Ce. The
preparation procedure included catalysts treated at high temperatures and under free of oxygen conditions.
Catalysts were characterized using BET, XRD, AA, PSD, TPR, TPD, H2-chemisorption. TPR and H2 chemisorp-tion showed good metal dispersion with 10 nm- 40 nm metal crystallites.
Glucose catalytic gasification runs were performed in a CREC Riser Simulator to evaluate the following cata-
lysts: (a) 5 %Ni/γ-Al2O3, (b) 5 %Ni-2 %La/γ-Al2O3 and (c) 5 %Ni-2 %Ce/γ-Al2O3. In all cases, the preparation
steps involved acid solutions with pHs of 1 and 4. In between consecutive runs, different approaches were
considered: (a) A catalyst was regenerated by air, (b) A catalyst was regenerated by air followed by hydrogen
pretreatment, (c) A catalyst was reused directly without any regeneration or hydrogen pretreatment. It was
observed that Ni-based catalysts, which were subjected after every run, to both, air regeneration and hydro-
gen pretreatment, displayed the best yields in close agreement with thermodynamic equilibrium. On the other
hand, Ni-based catalysts regenerated with air only, showed the worst hydrogen yields. In between these two-
hydrogen yield limits, where catalysts not contacted with air nor hydrogen, with these yields being moderately
below chemical equilibrium.
This shows that Ni-based fluidizable catalysts can perform on stream for extended periods, requiring limited
reactivation with air and H2. This makes of gasification using the catalysts of the present study, a viable process alternative that could be implemented at industrial scale.
Producción Científica de la Universidad Autónoma de Zacatecas UAZ
Fecha de publicación
2019
Tipo de publicación
Artículo
Recurso de información
Formato
application/pdf
Idioma
Inglés
Audiencia
Público en general
Repositorio Orígen
Repositorio Institucional Caxcán
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