The AD Scientific Index (Alper-Doger Scientific Index) provides the most comprehensive analysis across 13 main fields and 211 sub-branches at global, national, and regional levels. These analyses are based on indicators such as the H-index, i10-index, and citation count, including their values from the last 5 years. As of Dec 30, 2025, the rankings are determined according to the Total H Index. BETA VERSION: The subject field rankings for the world, regions, countries, and universities are currently in their Beta phase. This is due to the exclusion of (1.131.699) scientists categorized under ‘Others’, whose profiles have yet to be determined, edited, or classified. As updates are made to these fields, the rankings will be adjusted accordingly. Note: Please keep this in mind while reviewing the rankings. For further details, explore our [University Subject Rankings].
Rankings
Rankings
Ionic liquids | natural gas hydrates | membrane distilation CO2 conversion | wastewater treatment | adsorptio
H-Index Metrics
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H-Index69
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i10 Index191
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Citation Counts20,296
Rankings
Rankings
Solar Thermal Processes | Alternative Fuels | CO2 Capture & Utilization | Materials and Catalysi
H-Index Metrics
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H-Index54
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i10 Index128
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Citation Counts7,330
Rankings
Reaction and Catalysis | Catalysts synthesis | Mixed metal oxides | Combustion synthesi
H-Index Metrics
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H-Index49
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i10 Index117
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Citation Counts6,617
Rankings
Materials | Composites | Coatings | Corrosion | Energ
H-Index Metrics
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H-Index48
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i10 Index120
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Citation Counts7,399
Rankings
Complex Fluids | Formulation | Colloids and Surfaces | Wastewater Treatmen
H-Index Metrics
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H-Index47
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i10 Index130
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Citation Counts9,945
Rankings
Desalination | Water Treatment and Reuse. Crystallizatio
H-Index Metrics
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H-Index47
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i10 Index104
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Citation Counts6,671
Rankings
Advanced Materials | Adsorption | Membrane Separations | Energy Conversio
H-Index Metrics
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H-Index39
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i10 Index82
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Citation Counts7,487
Rankings
Molecular Simulations | Gas Processing | Water Treatment | Catalysis and Renewable Energ
H-Index Metrics
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H-Index38
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i10 Index85
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Citation Counts8,510
Rankings
Electrochemistry | Energy Storage Devices | Nanomaterials | Analytical Chemistry | Environmental Chemistr
H-Index Metrics
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H-Index37
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i10 Index81
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Citation Counts4,599
Rankings
Gas Processing | Process Safety | Hydrogen Economy | Process Design | Process Optimizatio
H-Index Metrics
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H-Index29
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i10 Index48
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Citation Counts2,574
Rankings
Process Design and Optimization | Computer Aided Desig
H-Index Metrics
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H-Index28
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i10 Index49
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Citation Counts2,824
Rankings
Membrane Technology | Nanotechnology | Gas Separation | Advanced Materials | and Petroleum Refiner
H-Index Metrics
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H-Index22
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i10 Index36
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Citation Counts1,617
Rankings
Chromatography | Adsorption | Modeling | Optimization | Contro
H-Index Metrics
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H-Index17
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i10 Index20
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Citation Counts1,374
Rankings
Molecular simulations | Engineering thermodynamics | Chemical engineering | Confined media | Molecula
H-Index Metrics
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H-Index10
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i10 Index10
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Citation Counts419
Rankings
Chemical Engineering | Gas and Process Engineering | Oilfield Chemistry | Conformance Control | Rheolog
H-Index Metrics
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H-Index6
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i10 Index5
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Citation Counts102
Rankings
Rankings
Chemical Engineering | Process | LCA | Decarbonizatio
H-Index Metrics
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H-Index5
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i10 Index3
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Citation Counts485
Rankings
Rankings
Rankings
Scale Inhibition | Process Integration | Chemical Engineerin
H-Index Metrics
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H-Index2
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i10 Index1
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Citation Counts28
Rankings
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