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Upgrading renewables, secondary, and waste streams through innovative hydroprocessing catalysts and reaction pathways

Problem statement

Hydroprocessing is a well-implemented and versatile refinery conversion strategy, comprising a wide array of reaction routes such as: (i) hydrotreating, aiming for the hydrogenation of unsaturated hydrocarbons and the removal (hydrogenolysis) of heteroatoms such as sulfur or nitrogen; (ii) hydrocracking, for promoting C–C bond scission and the partial saturation of aromatics; or (iii) hydrodeoxygenation, for the specific removal of oxygen moieties. In this project, we investigate the conversion of highly polyaromatic feedstock like heavy fuel oil (HFO), pyrolysis fuel oil (PFO), or bio-oils from different biomass sources (i.e., agricultural waste, algae) for quality improvement and obtaining products with higher added value.

We seek new (thermo-) catalytic strategies and improved heterogeneous catalysts with increased activity and stability. We put advanced analytical characterization techniques (i.e., nuclear magnetic resonance, high-res mass spectrometry) to work and combine their results with modeling and statistical tools.

Goals

  • Develop a quantitative analytical workflow to analyze and interpret these complex reacting environments
  • Explore novel renewable and waste resources to obtain chemicals and fuels
  • Deploy ad-hoc catalysts and process conditions to incorporate these wastes in the refinery (bio- and waste-refinery)
  • Analyze process dynamics and kinetics
HPC

Related People

Related Publications

Designing Supported ZnNi Catalysts for the Removal of Oxygen from Bio-Liquids and Aromatics from Diesel

by Loricera, Castaño, Infantes-Molina, Hita, Gutierrez, Arandes, Fierro, Pawelec
Green Chem. Year: 2012

Abstract

This work describes the effect of the support (TiO2, hybrid 2TiO2–SiO2, SBA-15 and SBA-15 decorated with TiO2 particles) on the catalytic activity of ZnNi  in the gas-phase hydrodeoxygenation (HDO or O-removal) of  and the liquid-phase hydrodearomatization (HDA) of synthetic diesel. These reactions are representative of the two major challenges of the hydrotreating unit embedded in a sustainable refinery: (i) decreasing oxygen content of bio-oils (produced in the pyrolysis of lignocellulosic biomass); and (ii) decreasing aromatics content in diesel. The fresh and deactivated  were characterized by , N2 adsorption–desorption, TPR, /TPD-NH3, , ,  and coke . Under steady-state conditions, the ZnNi  supported on SBA-15 decorated with TiO2 particles displayed the highest activity in the hydrodeoxygenation of  (selectivity toward deoxygenated products > 95%) whereas the ZnNi/SBA-15  displayed the highest activity in the hydrodearomatization of synthetic diesel. It has been shown that dispersion of the active ingredient is favoured on the SBA-15 substrate. The relationship between structure and activity demonstrated that HDO and HDA reactions require optimized metal dispersion and acid function, metal dispersion being more important for HDA than for HDO reactions.

Keywords

HCE HPC