Publications by authors named "Won-Ju Ahn"
The TiO2 powder was prepared from the spent titanium chips by applying the sol-gel method with neutralization by NaOH solution. The prepared TiO2 powder was characterized using a particle size analysis, BET surface area, and XRD analysis. The crystal structure of the TiO2 powder was rutile type, and the powder was obtained to be nanosized.
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- The greenhouse effect caused by carbon dioxide (CO2) is a critical global issue, prompting research into converting CO2 to methyl alcohol (CH3OH) using catalytic methods.
- A honeycomb-typed monolith was utilized as a catalyst support, which underwent both thermal and acid treatment to enhance its surface properties.
- Experiments indicated that while higher temperatures improved CO2 conversion in the hydrogenation process, they reduced selectivity for CH3OH, with optimal results achieved at around 250 degrees Celsius and 20 atm pressure.