Electronic binding of sulfur sites into Al<inf>2</inf>O<inf>3</inf>-ZrO<inf>2</inf> supports for NiMoS configuration and their application for Hydrodesulfurization

Leonardo Díaz-García, Víctor Santes, Tomás Viveros-García, Arturo Sánchez-Trujillo, Joel Ramírez-Salgado, Carlos Ornelas, Enrique Rodríguez-Castellón

Research output: Contribution to journalArticle

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Abstract

© 2016 Elsevier B.V. We present an effective chemical synthesis of bimetallic Nickel-Molybdenum catalysts. The catalysts were made using a sol-gel method with alumina modified by zirconia (Al2O3-xZrO2) support with x = 0, 10 and 15 wt-% respectively. In order to measure their catalytic activity, they were evaluated through hydrodesulfurization (HDS) reaction using industrial gas oil 2 wt-% sulfur content. Results, indicate an important increase of their catalytic activity in presence of zirconia, probably as caused by electron donation from atoms as presented in zirconia tetragonal structure (XRD). Furthermore, using high resolution characterization techniques such as X-ray Photoelectron Spectroscopy (XPS) and Temperature Programmed Reduction of Sulfides (TPR-S) has revealed a special interaction between zirconia and active sites, confirming the electron donation, mainly at Mo octahedral sites, as occurred due to formation of so-called NiMoS phase. In order to complete our analysis, images of High-Resolution Transmission Electron Microscopy (HRTEM) shown dispersed laminar molybdenum sulfide structures with some bending, high stacking over c-axis when the sol-gel alumina was modified by zirconium domains.
Original languageAmerican English
Pages (from-to)230-239
Number of pages206
JournalCatalysis Today
DOIs
StatePublished - 15 Mar 2017

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Hydrodesulfurization
Sulfur
Zirconia
sulfur
Aluminum Oxide
Molybdenum
Catalyst activity
molybdenum
Alumina
aluminum oxide
gel
Catalysts
catalyst
sulfide
Electrons
Sulfides
Gas oils
High resolution transmission electron microscopy
electron
Nickel

Cite this

Díaz-García, Leonardo ; Santes, Víctor ; Viveros-García, Tomás ; Sánchez-Trujillo, Arturo ; Ramírez-Salgado, Joel ; Ornelas, Carlos ; Rodríguez-Castellón, Enrique. / Electronic binding of sulfur sites into Al<inf>2</inf>O<inf>3</inf>-ZrO<inf>2</inf> supports for NiMoS configuration and their application for Hydrodesulfurization. In: Catalysis Today. 2017 ; pp. 230-239.
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Electronic binding of sulfur sites into Al<inf>2</inf>O<inf>3</inf>-ZrO<inf>2</inf> supports for NiMoS configuration and their application for Hydrodesulfurization. / Díaz-García, Leonardo; Santes, Víctor; Viveros-García, Tomás; Sánchez-Trujillo, Arturo; Ramírez-Salgado, Joel; Ornelas, Carlos; Rodríguez-Castellón, Enrique.

In: Catalysis Today, 15.03.2017, p. 230-239.

Research output: Contribution to journalArticle

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T1 - Electronic binding of sulfur sites into Al2O3-ZrO2 supports for NiMoS configuration and their application for Hydrodesulfurization

AU - Díaz-García, Leonardo

AU - Santes, Víctor

AU - Viveros-García, Tomás

AU - Sánchez-Trujillo, Arturo

AU - Ramírez-Salgado, Joel

AU - Ornelas, Carlos

AU - Rodríguez-Castellón, Enrique

PY - 2017/3/15

Y1 - 2017/3/15

N2 - © 2016 Elsevier B.V. We present an effective chemical synthesis of bimetallic Nickel-Molybdenum catalysts. The catalysts were made using a sol-gel method with alumina modified by zirconia (Al2O3-xZrO2) support with x = 0, 10 and 15 wt-% respectively. In order to measure their catalytic activity, they were evaluated through hydrodesulfurization (HDS) reaction using industrial gas oil 2 wt-% sulfur content. Results, indicate an important increase of their catalytic activity in presence of zirconia, probably as caused by electron donation from atoms as presented in zirconia tetragonal structure (XRD). Furthermore, using high resolution characterization techniques such as X-ray Photoelectron Spectroscopy (XPS) and Temperature Programmed Reduction of Sulfides (TPR-S) has revealed a special interaction between zirconia and active sites, confirming the electron donation, mainly at Mo octahedral sites, as occurred due to formation of so-called NiMoS phase. In order to complete our analysis, images of High-Resolution Transmission Electron Microscopy (HRTEM) shown dispersed laminar molybdenum sulfide structures with some bending, high stacking over c-axis when the sol-gel alumina was modified by zirconium domains.

AB - © 2016 Elsevier B.V. We present an effective chemical synthesis of bimetallic Nickel-Molybdenum catalysts. The catalysts were made using a sol-gel method with alumina modified by zirconia (Al2O3-xZrO2) support with x = 0, 10 and 15 wt-% respectively. In order to measure their catalytic activity, they were evaluated through hydrodesulfurization (HDS) reaction using industrial gas oil 2 wt-% sulfur content. Results, indicate an important increase of their catalytic activity in presence of zirconia, probably as caused by electron donation from atoms as presented in zirconia tetragonal structure (XRD). Furthermore, using high resolution characterization techniques such as X-ray Photoelectron Spectroscopy (XPS) and Temperature Programmed Reduction of Sulfides (TPR-S) has revealed a special interaction between zirconia and active sites, confirming the electron donation, mainly at Mo octahedral sites, as occurred due to formation of so-called NiMoS phase. In order to complete our analysis, images of High-Resolution Transmission Electron Microscopy (HRTEM) shown dispersed laminar molybdenum sulfide structures with some bending, high stacking over c-axis when the sol-gel alumina was modified by zirconium domains.

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