Producción Científica Profesorado

Role of the Si/Al molar ratio and pH in NIW/MCM41-Al2O3 catalystsfor HDS of DBT



Guevara Lara, Alfredo

2016

G. Hernández Cedeno, R. Silva-Rodrigo, A. Guevara-Lara, J.A. Melo-Banda, A.I. Reyes de la Torres, F. Morteo Flores, A. Castillo-Mares, Catalysis Today 271 (2016) 64?79.http://dx.doi.org/10.1016/j.cattod.2015.10.024


Abstract


This research presents a series of catalytic supports of MCM41 modified with -Al2O3 with a Si/Al molarratio of 10, 25 and 50. These materials were impregnated with Ni +W solutions at pH 7 and pH 9, respectivelyand were evaluated in the hydrodesulfurization (HDS) of dibenzothiophene (DBT) reaction. In orderto modify the low acidity of MCM41, its surface acidity was modified by incorporation of alumina contentin the supports.The sol?gel incorporation method of Al2O3 to the structure of the MCM41 did produce changes in thecharacteristic of hexagonal arrangement of mesoporous materials.The symmetries of the materials were determined through UV?vis where the octahedral and tetrahedralnickel species were found. By Raman, monotungstate (WO4) and polytunsgtate (W12O408?) specieswere observed. The HDS of DBT showed that in the NiW/AMS50 catalyst impregnated at pH 9 presents thehighest reaction rate. And in the case of the catalysts impregnated at pH 7 the highest reaction rate wasachieved by the NiW/AMS10 catalyst. The selectivity was mainly oriented to the production of biphenyl(BP). The low catalytic activity was attributable to low formation NiWS species responsible for the HDSactivity.



Producto de Investigación




Artículos relacionados

Electrochemical kinetic study about cobalt electrodeposition onto GCE and HOPG substrates from sulfa...

Theoretical and Experimental Study of Cobalt Nucleation and Growth onto Gold Substrate with Differen...

Revisión de variables de diseño y condiciones de operación en la electrocoagulación

Synthesis, Characterization and Catalytic Activity of Supported NiMo Catalysts

Copper Electrodeposition On Glassy Carbon And Highly Oriented Pyrolytic Graphite Substrates From Per...

Morphological and magnetic properties of cobalt nanoclusters electrodeposited onto HOPG

Chemical Reactivity of Atrazine Employing the Fukui Function

A theoretical quantum study on the distribution of electrophilic and nucleophilic active sites on th...

Nucleation and growth of cobalt onto different substrates: Part II. The upd-opd transition onto a go...

Effect of TiO2-Al2O3 sol-gel supports on the superficial Ni and Mo species in oxidized and sulfided ...