A5086284305- Catalytic Processes in Materials Science
- Catalysts for Methane Reforming
- Catalysis and Oxidation Reactions
- Catalysis and Hydrodesulfurization Studies
- Advanced Photocatalysis Techniques
- TiO2 Photocatalysis and Solar Cells
- Gas Sensing Nanomaterials and Sensors
- Graphene research and applications
- Carbon Nanotubes in Composites
- Biodiesel Production and Applications
- Lubricants and Their Additives
- Fullerene Chemistry and Applications
- Graphene and Nanomaterials Applications
- Electrocatalysts for Energy Conversion
- Membrane Separation Technologies
- Advanced Combustion Engine Technologies
- Synthesis of Tetrazole Derivatives
- Nonlinear Optical Materials Studies
- Covalent Organic Framework Applications
- Copper-based nanomaterials and applications
- Transportation Systems and Logistics
- Fiber-reinforced polymer composites
- Advanced ceramic materials synthesis
- Laser-Ablation Synthesis of Nanoparticles
- Engine and Fuel Emissions
Lodz University of Technology
2015-2024
University of Łódź
2016-2018
Abstract A series of TiO 2 photocatalysts loaded with various metals (Pt, Pd, Ni, and Cu) were prepared by using the wet impregnation method. Their physicochemical properties studied XRD, BET, TPR-H , FTIR TPD-NH 3 /CO techniques. The photocatalytic activity samples was investigated in gas-phase reduction carbon dioxide under continuous flow operation mode. Among all catalysts, Pt Ni most active terms formation rate methanol. In general, modified decreased increasing metal loading reaction...
Abstract Ethanol steam reforming was studied over Ni supported catalysts. The effects of support (Al 2 O 3 , Al –ZnO, and –CeO ), metal loading, catalyst activation method, steam-to-ethanol molar feed ratio were investigated. properties catalysts by N physisorption, TPD-CO X-ray diffraction, temperature programmed reduction. After activity tests, the analyzed TOC analysis. catalytic measurements showed that addition either ZnO SSor CeO to alumina enhances both ethanol conversion promotes...
In order to expand the spectral capabilities of SERS method, Ag–Cu alloy nanoparticle arrays were studied. Arrays nanoparticles formed by vacuum thermal evaporation and condensation on an unheated substrate followed heat treatment at 230 °C. A higher Raman scattering enhancement in red region spectrum when using array eutectic system was found. This is comparable one pure silver particle blue spectrum. Transmission electron microscopy study has shown that feature many particles are...
The photocatalytic activity of TiO2 depends on numerous factors, such as the chemical potential electrons, charge transport properties, band-gap energy, and concentration surface-active sites. A lot research has been dedicated to determining properties that have most significant influence semiconductors. Here, we demonstrated in gas-phase reduction CO2 is governed mainly by desorption rate reaction intermediates final products. This indicates specific surface area binding strength products...
Herein, we reported the method of synthesis sodium titanates using metal-ammonia solution and their photocatalytic activity for gas-phase reduction carbon dioxide under visible light. The results physicochemical measurements showed that obtained samples resemble multiphase systems containing Na2Ti4O9, Na4Ti5O12, Na0.8Ti4O8 cylindrical forms. They demonstrated perfect adsorption light improved in investigated process.
For the first time, it was demonstrated that catalytic properties of semiconductors can be activated using an external electric field only. More particularly, TiO2 and Fe2O3 were found to produce noticeable amounts carbon monoxide from dioxide – water vapor gas mixture under with strength in 104 V/cm range. The reported process, i.e. activation is more efficient than utilization UV–vis radiation terms energy efficiency amount products formed.
In the present work, for first time, possibility of formation CrAl2O4 was shown from equimolar mixture co-precipitated Al2O3 and Cr2O3 oxides under a reductive environment. The crystallographic properties formed compound were calculated using DICVOL procedure. It determined that it has cubic crystal structure with space group Fd-3m unit cell parameter equal to 8.22(3) Å. is not stable ambient conditions easily undergoes oxidation α-Al2O3 α-Cr2O3. overall sequence phase transformations...
The investigation of the course Boudouard reaction and methane cracking was performed over nickel catalysts based on oxides calcium, aluminum, magnesium. catalytic samples were synthesized by impregnation method. physicochemical characteristics determined using atomic adsorption spectroscopy (AAS), Brunauer–Emmett–Teller method analysis (BET), temperature-programmed desorption ammonia carbon dioxide (NH3- CO2-TPD), reduction (TPR). Qualitative quantitative identification formed deposits...
The synthesis of multi-walled carbon nanotubes (MWCNTS) has been the focus considerable research effort for more than twenty-five years and it continues to receive increasing attention because its importance produce with suitable parameters future applications. To best our knowledge this study presents first time complex studies concerning effect aerosol-assisted chemical vapour deposition (AACVD) process conditions (including temperature (750–1200 °C) composition carrier gas (N2, Ar, He, 5%...
This work investigates the effect of addition Ru and CeO2 on process gasification carbon deposits formed surface a nickel catalyst during mixed methane reforming process. Activity studies were carried out (Ru)-Ni/CeO2-Al2O3 catalysts at temperature 650–750 °C. The ruthenium-promoted exhibited highest activity. Carbonized post-reaction samples tested with TOC technique to investigate carbonization state samples. bimetallic had lowest amount deposit (1.5%) after reaction 750 reactivity species...
Abstract The aim of the work was to investigate how size Ni and Cu-supported nanoparticles influence their activity in an oxidative steam reforming methanol. metal particles controlled by initial introduction or elimination oxygen-containing groups on surface carbon nanotubes. results tests showed that catalysts with smallest were least active since they easily underwent oxidation during process.
Abstract The article is devoted to the synthesis of ceramic membranes based on silicon carbide and study their mechanical, electrical, antibacterial properties. SiC-based have a few advantages, namely high surface hydrophilicity, good water permeability negative charge, which leads better performance during operation. effect carbonate type addition liquid glass physicochemical properties was investigated using diffraction analysis scanning electron microscopy. It found that regardless type,...
Abstract The paper shows the structural changes of copper and nickel catalysts in presence strong (O 2 ) weak (H O) oxidizing agents their influence on course methane conversion. oxidation states investigated were studied during partial steam reforming using an X‐ray reactor chamber (XRD) coupled with online mass spectrometer. Also, susceptibility these to reduction by individual reaction components was TPR, TPO, situ XPS techniques. obtained results indicated distinct catalytic behavior...
Purpose. Determination of the impact oil pollution at territory adjacent to airport on ecological state soil. Methodology. The authors evaluate petroleum products conditions soil airport. In particular, it was done experimentally, using method biotesting sample data. Also, component composition chemical analyzed applying chromatographic analysis. Using mathematical modeling, a two-factor model built taking into account factor “content (X1)” in and “distance from runway (X2)” describe air...
Abstract This study focuses on investigating the sole impact of an external electric field photocatalytic activity TiO 2 -based materials. Typically, built-in fields are used to efficiently separate free energy carriers and improve performance semiconductors. The creation such requires modifications photocatalyst that alter various properties as adsorption optical characteristics. These make it challenging isolate interpret promotion effect associated with alone. investigations were carried...
This work investigated the influence of catalytic support precursor on activity nickel catalysts 20%Ni/5%La2O3-95%Al2O3 in mixed methane reforming process. The tests were carried out at a temperature 750 °C. research showed that catalyst prepared from containing chloride exhibited very low conversions and carbon dioxide. poisoned system before after calcination process was subjected to Temperature Programmed Surface Reaction determine whether thermal treatment causes decrease amount chlorine...