​​

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

Effect of the Support Acidity on the Aromatic Ring-Opening of Pyrolysis Gasoline over Pt/HZSM-5. Catalysts

by Castaño, Gutierrez, Villanueva, Pawelec, Arandes
Catal. Today Year: 2009

Abstract

In this paper we evaluate the effect of the acidity of the support (HZSM-5) and the nature of the interaction between the active phases of the bifunctional Pt/HZSM-5 catalyst on the aromatic ring-opening of pyrolysis gasoline under hydrocracking conditions. The catalysts were characterized by N2 adsorption–desorption isotherms, CO chemisorption, pyridine FTIR, NH3 adsorption-DSC and NH3 TPD. The catalyst screening in the pyrolysis gasoline hydrocracking demonstrated that: (i) the conversion of pyrolysis gasoline is linearly dependent on support acidity. At low acidities values the main mechanisms of ring-opening is through hydrogenolysis and thus, the less acidic catalyst shows higher conversion than expected; (ii) the synergysm between the metal and acid-sites is enhanced when using a bifunctional catalyst instead of a hybrid one, due to the increase in H2 spill-over efficiency. However, in terms of activity, the most acid catalyst (hybrid) shows the highest aromatic conversion, in correspondence with (i).

Keywords

W2C HCE HPC