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World Scientist and University Rankings 2026
Portugal Engineering & Technology / Chemical Engineering 22 Scientists Subject Rankings
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 Jan 05, 2026, 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 (1.131.911) 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].
* Total H Index Rankings
Rankings
38,008
World Rank
117
Country Rank
14
University
Ranking Based On Selection:
1
Engineering & Technology / Chemical Engineering
Chemical Engineering | Membrane Science and Engineering | Bioengineerin
Chemical Engineering | Membrane Science and Engineering | Bioengineerin
H-Index Metrics
-
H-Index69
-
i10 Index282
-
Citation Counts16,178
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* Total H Index Rankings
Rankings
87,785
World Rank
283
Country Rank
1
University
Ranking Based On Selection:
2
* Total H Index Rankings
Rankings
93,919
World Rank
309
Country Rank
43
University
Ranking Based On Selection:
3
Engineering & Technology / Chemical Engineering
Heterogenous Catalysis | Adsorption | Carbon Materials | Reaction Engineering | Nanomaterial
Heterogenous Catalysis | Adsorption | Carbon Materials | Reaction Engineering | Nanomaterial
H-Index Metrics
-
H-Index50
-
i10 Index143
-
Citation Counts8,705
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* Total H Index Rankings
Rankings
150,737
World Rank
521
Country Rank
101
University
Ranking Based On Selection:
4
Engineering & Technology / Chemical Engineering
Optimization | Scheduling | Process Systems Engineering | Chemical Engineering | Operations Researc
Optimization | Scheduling | Process Systems Engineering | Chemical Engineering | Operations Researc
H-Index Metrics
-
H-Index41
-
i10 Index82
-
Citation Counts5,918
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* Total H Index Rankings
Rankings
300,127
World Rank
1,127
Country Rank
8
University
Ranking Based On Selection:
5
Engineering & Technology / Chemical Engineering
Chemical Engineering | Supercritical fluids | Antioxidants | Thermodinamics | Food Technolog
Chemical Engineering | Supercritical fluids | Antioxidants | Thermodinamics | Food Technolog
H-Index Metrics
-
H-Index29
-
i10 Index44
-
Citation Counts3,146
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* Total H Index Rankings
Rankings
320,093
World Rank
1,208
Country Rank
10
University
Ranking Based On Selection:
6
* Total H Index Rankings
Rankings
402,274
World Rank
1,552
Country Rank
52
University
Ranking Based On Selection:
7
Engineering & Technology / Chemical Engineering
Energy | Renewable Resources | Chemical Engineering | Catalysis | Process Intensificatio
Energy | Renewable Resources | Chemical Engineering | Catalysis | Process Intensificatio
H-Index Metrics
-
H-Index24
-
i10 Index29
-
Citation Counts1,723
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* Total H Index Rankings
Rankings
439,689
World Rank
1,699
Country Rank
14
University
Ranking Based On Selection:
8
Engineering & Technology / Chemical Engineering
Enzyme and monoclonal antibody technology | Biocatalysis | Biosensors | Protein separation methods | Mushroom technology
Enzyme and monoclonal antibody technology | Biocatalysis | Biosensors | Protein separation methods | Mushroom technology
H-Index Metrics
-
H-Index23
-
i10 Index42
-
Citation Counts1,450
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* Total H Index Rankings
Rankings
608,328
World Rank
2,468
Country Rank
52
University
Ranking Based On Selection:
9
Engineering & Technology / Chemical Engineering
Chemical Engineering | Food Science & Technology | Biotechnology | Food Chemistry | Biorefinery approac
Chemical Engineering | Food Science & Technology | Biotechnology | Food Chemistry | Biorefinery approac
H-Index Metrics
-
H-Index17
-
i10 Index24
-
Citation Counts1,646
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* Total H Index Rankings
Rankings
623,995
World Rank
2,550
Country Rank
18
University
Ranking Based On Selection:
10
* Total H Index Rankings
Rankings
804,771
World Rank
3,584
Country Rank
123
University
Ranking Based On Selection:
11
Engineering & Technology / Chemical Engineering
Chemistry | Chemical Engineering | Pharmaceutical compound
Chemistry | Chemical Engineering | Pharmaceutical compound
H-Index Metrics
-
H-Index13
-
i10 Index14
-
Citation Counts434
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* Total H Index Rankings
Rankings
840,838
World Rank
3,841
Country Rank
195
University
Ranking Based On Selection:
12
* Total H Index Rankings
Rankings
972,444
World Rank
4,876
Country Rank
168
University
Ranking Based On Selection:
13
* Total H Index Rankings
Rankings
1,217,305
World Rank
6,782
Country Rank
250
University
Ranking Based On Selection:
14
* Total H Index Rankings
Rankings
1,258,091
World Rank
7,017
Country Rank
554
University
Ranking Based On Selection:
15
Engineering & Technology / Chemical Engineering
Data Analytics | Data Science | Computional Fluid Dynamic
Data Analytics | Data Science | Computional Fluid Dynamic
H-Index Metrics
-
H-Index8
-
i10 Index7
-
Citation Counts486
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* Total H Index Rankings
Rankings
1,260,578
World Rank
7,042
Country Rank
1,134
University
Ranking Based On Selection:
16
Engineering & Technology / Chemical Engineering
Chemical Engineering | Catalysis | Green fuels | Biodiese
Chemical Engineering | Catalysis | Green fuels | Biodiese
H-Index Metrics
-
H-Index8
-
i10 Index7
-
Citation Counts307
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* Total H Index Rankings
Rankings
1,356,000
World Rank
7,775
Country Rank
399
University
Ranking Based On Selection:
17
* Total H Index Rankings
Rankings
1,369,402
World Rank
7,842
Country Rank
407
University
Ranking Based On Selection:
18
* Total H Index Rankings
Rankings
1,390,313
World Rank
7,933
Country Rank
442
University
Ranking Based On Selection:
19
Engineering & Technology / Chemical Engineering
Chemical Engineering | Wastewater treatment | Water production and quality | Membrane Processe
Chemical Engineering | Wastewater treatment | Water production and quality | Membrane Processe
H-Index Metrics
-
H-Index7
-
i10 Index7
-
Citation Counts353
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* Total H Index Rankings
Rankings
1,395,417
World Rank
7,978
Country Rank
305
University
Ranking Based On Selection:
20
Engineering & Technology / Chemical Engineering
Biotechnology | Bioprocess Engineering | Chemical Engineering | Microbiology | Microalga
Biotechnology | Bioprocess Engineering | Chemical Engineering | Microbiology | Microalga
H-Index Metrics
-
H-Index7
-
i10 Index6
-
Citation Counts561
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* Total H Index Rankings
Rankings
1,472,725
World Rank
8,594
Country Rank
724
University
Ranking Based On Selection:
21
* Total H Index Rankings
Rankings
1,564,164
World Rank
9,039
Country Rank
106
University
Ranking Based On Selection:
22
Engineering & Technology / Chemical Engineering
Chemical Engineering | Environmental Sciences | water resources | wastewater treatmen
Chemical Engineering | Environmental Sciences | water resources | wastewater treatmen
H-Index Metrics
-
H-Index6
-
i10 Index5
-
Citation Counts190
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