​​

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

Oxidative desulfurization of model compounds and crude oil using Mo/Ti-DMSN catalyst and a detailed molecular characterization of sulfur species

by Fan, Chen, Saxena, Li, Castaño, Zhang, Roberts
Catal. Today Year: 2022 DOI: https://doi.org/10.1016/j.cattod.2022.05.009

Abstract

We prove here that Mo supported on Ti-modified dendritic mesoporous silica nanoparticles (DMSN) is an excellent catalyst for the oxidative desulfurization of model compounds and real crude oils. The catalyst was synthesized; characterized; tested in the removal of benzothiophene, dibenzothiophene, and 4,6-dimethyl dibenzothiophene; and re-tested in the sulfur removal from Arabian extra light crude oil under the optimized conditions. The can remove 92.5–99.5% of the most refractory compounds in the optimized conditions of 80 °C. For the Arabian Extra light crude oil (AXL), we employed Fourier-transform ion cyclotron resonance (FT-ICR) to analyze in detail the sulfur-containing compounds in the feedstock, oxidized product, and extraction phase. The sulfoxide species with low double bond equivalent (DBE) can be removed entirely after the stage 1 extraction.

Keywords

HPC W2C ANW