A5020826788- Catalysts for Methane Reforming
- Catalysis and Hydrodesulfurization Studies
- Catalysis for Biomass Conversion
- Catalytic Processes in Materials Science
- Electrocatalysts for Energy Conversion
- Metal-Organic Frameworks: Synthesis and Applications
- Atmospheric Ozone and Climate
- Subcritical and Supercritical Water Processes
- Supercapacitor Materials and Fabrication
- Advanced materials and composites
- Thermochemical Biomass Conversion Processes
- nanoparticles nucleation surface interactions
- Polyoxometalates: Synthesis and Applications
- Iron oxide chemistry and applications
- Asymmetric Hydrogenation and Catalysis
- Atmospheric chemistry and aerosols
- Zeolite Catalysis and Synthesis
- Radioactive contamination and transfer
- Nanomaterials for catalytic reactions
- Catalysis and Oxidation Reactions
- Carbon dioxide utilization in catalysis
- Covalent Organic Framework Applications
National Institute of Clean and Low-Carbon Energy
2023-2024
Eindhoven University of Technology
2020-2024
Institute of Coal Chemistry
2016-2018
University of Chinese Academy of Sciences
2016-2018
Chinese Academy of Sciences
2016
State Council of the People's Republic of China
2016
CO2 hydrogenation to methanol can play an important role in meeting the sustainability goals of chemical industry. In this study, we investigated detail Cu–CeO2 interactions for synthesis, emphasizing copper surface and interface sites between ceria CO. A combined CO2–N2O titration approach was developed quantify exposed metallic oxygen vacancies reduced Cu/CeO2 catalysts. Extensive characterization shows that dispersion is strongly enhanced by strong comparison Cu/SiO2. activity data show...
Oil has long been the dominant feedstock for producing fuels and chemicals, but coal, natural gas biomass are increasingly explored alternatives
An unprecedented 80.2% yield of alkyl levulinate was obtained <italic>via</italic> one-pot conversion furfural with 2-propanol over Au-H<sub>4</sub>SiW<sub>12</sub>O<sub>40</sub>/ZrO<sub>2</sub>.
New understanding on reaction mechanism of cellulose hydrogenolysis to ethylene glycol over WO<sub>3</sub>–ZrO<sub>2</sub> catalyst combined with Ru/C.
With an increase in energy consumption globally, Fischer-Tropsch (FT) synthesis is a good alternative for producing fuels and chemicals from coal, natural gas or biomass. Among them, coal to liquids has been put into production countries that have large reserves. In this process, Fe-based catalysts are commonly used due their earth abundance, comparatively wide operation range ready availability handle low H2/CO ratio coal. Despite extensive applications, the kinetic mechanistic...
The influence of zeolite domain size, acidity, and metal type on n-decane n-nonadecane hydroconversion was investigated for bifunctional Pd(Pt)/ZSM-5 (bulk, desilicated, thin thick nanosheets). Decreasing the size zeolitic domains to a few nanometers results in lower overall activity, higher skeletal isomerization yield, an imbalance between acid functions. These changes are attributed pore occupancy olefinic intermediates due substantially larger external surface nanosheets desorption...
The formation of Fe-carbide phases is relevant to the synthesis Fischer-Tropsch catalysts. We investigated carburization Raney Fe as a model catalyst using spectroscopic and temperature-programmed techniques. IR spectroscopy shows that CO dissociation already occurs at −150 °C, while C diffusion into metallic requires much higher temperature (~180 °C). rate increases with increasing H2/CO ratio, which can be attributed lower overall barrier for O removal H2O compared CO2. frees vacancies are...
The kinetics of the transformation metallic Fe to active carbide phase at start Fischer–Tropsch (FT) reaction were studied. diffusion rates C atoms going in or out lattice determined using 13C-labeled synthesis gas combination with measurements transient 12C and 13C contents by temperature-programmed hydrogenation. In initial 20 min, diffuses rapidly into occupying thermodynamically very stable interstitial sites. FT starts already during these early stages carburization. When reaching...
A highly active and selective cobalt catalyst was developed for the hydrogenation of biomass-derived ethyl levulinate (EL) to γ-valerolactone (GVL), 4-hydroxypentanoate (EHP), 1,4-pentanediol (1,4-PDO) 2-methyltetrahydrofuran (2-MTHF), which are considered be value-added chemicals important biofuels. The effects reaction time, temperature, amount solvent on its catalytic performance were investigated. In addition, pathway studied as well. It found that selectivity GVL, 1,4-PDO 2-MTHF Co/ZrO2...
A well-known observation in the Fe-catalyzed Fischer-Tropsch (FT) reaction is that Fe-carbide catalysts deactivate due to carbon deposition. In comparison, influence of such deposits on product distribution has been less widely reported. The present work investigates relationship between kinetics FT for a carburized Raney-Fe model catalyst and composition catalytic surface with focus deposits. deposition during ongoing at low pressure decreases activity increases CH4 selectivity....
Potassium (K) promoter and its loading contents were shown to have remarkable effects on the Fe–O–Si interaction of precipitated Fe/Cu/K/SiO2 catalysts for low-temperature Fischer-Tropsch synthesis (FTS). With increase in K content from 2.3% (100 g Fe based) up 7% calcined precursors, was weakened, as reflected by ATR/FTIR, H2-TPR XPS investigations. XRD results confirmed that diffraction peak intensity (510) facet χ-Fe5C2 phase strengthened with increasing loading, which indicates...
Using model catalysts with well-defined particle sizes and morphologies to elucidate questions regarding catalytic activity stability has gained more interest, particularly utilizing colloidally prepared metal(oxide) particles. Here, synthesized iron oxide nanoparticles (FexOy-NPs, size ∼7 nm) on either a titania (FexOy/TiO2) or silica (FexOy/SiO2) support were studied. These catalyst systems showed excellent in the Fischer–Tropsch olefin (FTO) reaction at high pressure. However, FexOy/TiO2...
Abstract Glycols are accessible via metal‐catalyzed hydrogenolysis of sugar alcohols such as xylitol obtained from hemicellulose. Ru‐based catalysts highly active but also catalyze side‐reactions decarbonylation and deoxygenation. To achieve high selectivity, these reactions need to be suppressed. In our study, we introduce heteroatom doped carbon materials catalyst supports providing selectivity. Heteroatom doping with nitrogen oxygen was achieved by treating activated HNO 3 , NH H 2 or...
With an increase in energy consumption globally, Fischer-Tropsch (FT) synthesis is a good alternative for producing fuels and chemicals from coal, natural gas or biomass. Among them, coal to liquids has been put into production countries that have large reserves. In this process, Fe-based catalysts are commonly used due their earth abundance, comparatively wide operation range ready availability handle low H2/CO ratio coal. Despite extensive applications, the kinetic mechanistic...