Keyphrases
Zirconium Dioxide
100%
Acid-catalyzed
100%
Chlorosulfonic Acid
100%
Acid Modified
100%
Modified Zirconia
100%
Biodiesel Production
100%
Oleic Acid Esterification
100%
Sulfuric Acid
75%
Heterogeneous Catalyst
25%
Leaching
25%
High Catalytic Activity
25%
SO42-
25%
Sulfur Content
25%
Reusability
25%
Catalyst Deactivation
25%
Pre-treatment Step
25%
Oleic Acid
25%
Biodiesel
25%
Long-term Durability
25%
Acid Sites
25%
Fatty Acid Methyl Esters
25%
Solid Acid
25%
NH3-TPD
25%
Soap Formation
25%
Free Fatty Acid Esterification
25%
Methyl Ester Yield
25%
Low-cost Feedstock
25%
Fossil Energy
25%
Renewable Alternatives
25%
5-cycle
25%
Material Science
Zirconia
100%
Biodiesel
100%
Feedstock
14%
Leaching
14%
Thermogravimetric Analysis
14%
Scanning Electron Microscopy
14%
Energy-Dispersive X-Ray Spectroscopy
14%
X-Ray Diffraction
14%
Catalyst Activity
14%
Catalyst Deactivation
14%