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Marta Díaz,Eva Epelde,Andrés T. Aguayo,Javier Bilbao 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.87 No.-
The capacity of HZSM-5 zeolite (SiO2/Al2O3 ratio = 30–280) based catalysts with a hierarchical porousstructure has been explored for the oligomerization of 1-butene at low pressure. Catalysts werecharacterized (structural, physical and acid properties) and tested in afixed bed reactor under thefollowing conditions: 1.5 bar; 175–325 C; space time, 0.5–10 gcatalyst h (molC) 1; butene partial pressure,0.375–1.5 bar; time on stream, 10 h. Results were evaluated with the aim of boosting naphtha (C5-C12=)fraction. A good compromise between conversion (62% in C units contained) and naphtha yield (42%) wasachieved by using a HZSM-5 zeolite with SiO2/Al2O3 = 30 at 275 C and 6 gcatalyst h (molC) 1, where 23%corresponds to C8-C12= and 19% to C5-C7=, respectively. Furthermore, the hierarchical porous structurefacilitated catalysts to tend to a pseudo-stationary deactivation state after 2–3 h time on stream, whichcould be interesting for process scale up.
Reaction network of the chloromethane conversion into light olefins using a HZSM-5 zeolite catalyst
Monica Gamero,Beatriz Valle,Pedro Castaño,Andrés T. Aguayo,Javier Bilbao 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.61 No.-
The second step of chlorine-mediated methane valorization into hydrocarbons has been investigated using a HZSM-5 zeolite catalyst. A parametric study has enabled to set the reaction network, which is dominated by the dual cycle mechanism and secondary reactions of light olefins. This network explains the formation of methane, light olefins, C5+ aliphatics, paraffins, aromatics and coke. Under the optimal conditions, the light olefin selectivity is >70%, of which >40% corresponds to propylene. Coke is originated in the zeolite micropores and then grows within the matrix meso- and macropores.
Lide Oar-Arteta,,Aingeru Remiro,Andre´ s T. Aguayo,Martin Olazar,Javier Bilbao,Ana G. Gayubo 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.36 No.-
This study aims at optimizing the composition of the bifunctional catalyst with CuFe2O4 spinel metallicfunction for the steam reforming of DME (SRD). The g-Al2O3 obtained by calcination of boehmite at550 8C proves to be the most suitable acid function, given that it provides high activity for DMEhydrolysis and avoids hydrocarbon formation in the 300–400 8C range. Furthermore, the optimum massratio between CuFe2O4 and g-Al2O3 functions is 1/1 at 350 8C, since it allows obtaining the highest DMEconversion and H2 yield with suitable catalyst stability and mechanical resistance.