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Magnetic Inducement Utilization for Dopant Modification in Alumina Support for Ethanol Steam Reforming
Sasimas Katanyutanon1, Suparoek Henpraserttae2, Sirintra Arayawate3
1School of Bio-Chemical Engineering and Technology (BCET), Sirindhorn International Institute of Technology (SIIT), Thammasat University, Pathum Thani 12120, Thailand.
ACS Omega
|December 8, 2025
Summary
Magnetic field-assisted synthesis enhances doped alumina supports for ethanol steam reforming. Paramagnetic dopants, particularly with N-N magnetic configuration, improve catalyst performance and reduce carbon deposition for efficient hydrogen production.
Area of Science:
- Materials Science
- Catalysis
- Chemical Engineering
Background:
- Alumina (Al2O3) supports are crucial for catalysis.
- Ethanol steam reforming (ESR) is a key process for hydrogen production.
- Optimizing catalyst support properties is essential for improving ESR efficiency and stability.
Purpose of the Study:
- To investigate the effect of magnetic inducement during synthesis on the properties of doped Al2O3 supports.
- To evaluate the catalytic performance of these modified supports in ethanol steam reforming.
- To understand the role of dopant type and magnetic field configuration on support characteristics and catalytic activity.
Main Methods:
- Synthesis of ZrO2, CeO2, and Gd2O3-CeO2 doped Al2O3 supports under varying magnetic fields (no magnet, N-N, N-S).
- Characterization using X-ray Diffraction (XRD), Brunauer-Emmett-Teller (BET) analysis, Temperature Programmed Desorption (TPD), Thermogravimetric Analysis (TGA), and Transmission Electron Microscopy with Energy Dispersive Spectroscopy (TEM-EDS).
- Evaluation of Ni catalysts supported on these materials for ethanol steam reforming (ESR).
Main Results:
- Magnetic inducement, especially the N-N configuration, significantly improved dopant dispersion and oxygen storage capacity in supports with paramagnetic dopants (Ce3+, Gd3+).
- Ni catalysts on Gd2O3-CeO2-Al2O3 (N-N) showed the highest H2 production rate (3.23 mol/h·gcat at 600 °C) and lowest carbon deposition.
- Supports with diamagnetic Zr4+ showed less response to magnetic inducement and lower catalytic activity.
Conclusions:
- Magnetic field-assisted synthesis is a promising strategy for tuning the physicochemical properties of doped alumina supports.
- The use of paramagnetic dopants in conjunction with magnetic inducement significantly enhances catalytic performance in ESR.
- This approach offers a pathway to improve hydrogen production efficiency and coke resistance in catalytic applications.
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