Heterogeneous catalyst engineering ⇒ from stable and deactivation resistant to viable technical catalyst

Problem statement

Advances in heterogeneous catalyst “structure” are driven to improve their “function” or performance, i.e., activity, selectivity, and stability. Cooperative research is required to understand the structure and function relationships: developing new synthesis protocols for heterogeneous catalysts with unique surface properties, defined porosity, identification and understanding of catalytically active sites, reaction mechanisms, and finally, prediction and analysis of the processes using various computational tools.

Our group focuses on developing new catalyst formulations using innovative synthesis routes for various important heterogeneous catalysts. That includes thermal, electro, and bio-electro catalysis.

The active phase cannot be used directly in its final application or reactor for various reasons, including poor mechanical resistance, heat or mass transport, and fluidization features. We must mix the active phase with other ingredients in a matrix of binder and filler, while we shape it into a technical catalyst. We investigate new synthetic protocols for technical catalysis using spray drying and fluidized beds to cover the whole range of sizes. At the same time, we incorporate additional (unconventional) ingredients such as SiC to improve some features even further.

Goals

  • Technical catalyst I ⇒ spray drying and extrusion
  • Technical catalyst II ⇒ spray fluidized bed reactor
  • Technical catalyst III ⇒ electrospinning
  • Zeolite catalysts ⇒ with defined structure/porosity
  • Multi-metal (high entropy) alloy catalysts
  • MXene catalysts ⇒ single and multi-dimensional
  • Perovskite catalysts
  • Metal-organic framework (MOFs) catalysts
  • Supported metal/metal-oxide catalysts
  • Aerogel catalyst

Related People

Related Covers

Related Publications

Preliminary Studies on Fuel Production Through LCO Hydrocracking on Noble-Metal Supported Catalysts

by Gutierrez, Arandes, Castaño, Olazar, Bilbao
Fuel Year: 2012

Abstract

The upgrading of LCO (Light Cycle Oil), which is an aromatic stream from FCC units, has been studied in order to obtain naphtha and medium distillates. The catalysts used have metallic functions of Pd, Pt and Pt–Pd, supported on acid materials of different porous structure and different acidity (HY zeolites, Hβ zeolite, amorphous alumina and an FCC catalyst). The experiments have been carried out in an exothermic fixed bed reactor under the following conditions: 350 °C; 40–50 bar; H2/LCO molar ratio (nH2), 8.90, 10.00 and 30.23 molH2 (molLCO)−1; space velocity (WHSV), 1 and 4 h−1; time-on-stream, 24 h. The effect of catalyst composition and properties (porous structure and acidity) on conversion, yields of products fractions (dry gases, LPG, naphtha and medium distillates) and selectivity and composition of naphtha and medium distillate fractions has been determined. Pt/Hβ catalyst is suitable for maintaining a high selectivity of naphtha (75–80 wt.%) in a range of conversions between 85 and 95 wt.%. Pt/HY catalyst (SiO2/Al2O3 = 5) is the most suitable for producing medium distillates with a selectivity of 65 wt.% for a conversion of 85 wt.%. Pt/HY (SiO2/Al2O3 = 12) catalyst is efficient for obtaining naphtha and medium distillates with a lower content of aromatics. Pt–Pd bimetallic function is interesting for the catalyst to maintain a high conversion at the pseudostable state.

Keywords

HPC HCE W2C