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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

Upgrading of Bio-Liquids on Different Mesoporous Silica-Supported CoMo Catalysts

by Nava, Pawelec, Castaño, Alvarez-Galvan, Loricera, Fierro
Appl. Catal. B: Environ. Year: 2009

Abstract

Bio-liquids upgrading via catalytic hydrotreating represents an alternative route to produce liquid hydrocarbon fuels. In this paper, the upgrading of an olive oil production-derived by-product has been conducted in a down-flow fixed-bed reactor at 250 °C, 3 MPa with sulfided CoMo catalysts. The catalysts were prepared by successive impregnation (with Mo being introduced first) and supported on different mesoporous silicates (DMS-1, SBA-15, SBA-16, HMS) with the aim to study the effect of support morphology on the catalytic response of sulfided CoMo catalysts. The supports and/or calcined catalysts were characterized by N2 adsorption–desorption isotherms, XRD, TPR and TPD-NH3 techniques. In addition, spent catalysts were studied by XPS, HRTEM and TPO/TG techniques. All sulfide CoMo catalysts were stable for 5 h of time-on-stream (TOS) reaction and recorded higher activity than a commercial sulfide NiMo/Al2O3 catalyst. The catalysts supported on the SBA-15, SBA-16 and DMS-1 materials were much more effective for oxygen removal than the HMS-supported one. The enhancement of activity was explained in terms of higher active phase exposure and increased acidity. It was found that support morphology affected the distribution of useful products. Considering the balance of desirable and undesirable products, the CoMo/SBA-16 catalyst had an optimal performance.

Keywords

HPC HCE W2C