World

Top 100 Scientists

World Top 100 Scientists 2026

The Top 100 scientists are ranked based on total H-index scores at the global, regional, national, and institutional levels. Rankings cover 10 regions, 13 main fields, and 221 subfields. Subject field rankings (at world, region, country, and university levels) are currently in Beta version and updated in near real-time.
Note: Researchers classified as "others" (currently 1,122,068 profiles whose fields are undetermined or unedited) are excluded from subject and regional rankings. These rankings will dynamically evolve as the “others” profiles are reviewed and properly categorized.

Country

* Total H Index Rankings

Rankings

26,990

World Rank

Country Rank

University

Ranking Based On Selection:

Hassan Arafat

Khalifa University of Science and Technology Abu Dhabi, United Arab Emirates

Engineering & Technology / Chemical Engineering
Graphene | 2D Materials | Membrane separations | sustainable desalination | Research Managemen

H-Index Metrics

H-Index

75
i10 Index

151
Citation Counts

17,232

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* Total H Index Rankings

Rankings

42,250

World Rank

Country Rank

University

Ranking Based On Selection:

Inas Alnashef

Khalifa University of Science and Technology Abu Dhabi, United Arab Emirates

Engineering & Technology / Chemical Engineering
Ionic liquids | deep eutectic solvents | green engineering | water and wastewater treatmen

H-Index Metrics

H-Index

65
i10 Index

154
Citation Counts

15,870

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* Total H Index Rankings

Rankings

55,963

World Rank

Country Rank

University

Ranking Based On Selection:

Ludovic (Ludo) Dumee

Khalifa University of Science and Technology Abu Dhabi, United Arab Emirates

Engineering & Technology / Chemical Engineering
separation materials | resource recovery | direct air capture | green metallurgy | circular econom

H-Index Metrics

H-Index

59
i10 Index

188
Citation Counts

12,476

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* Total H Index Rankings

Rankings

68,529

World Rank

Country Rank

University

Ranking Based On Selection:

Maaike Kroon

Khalifa University of Science and Technology Abu Dhabi, United Arab Emirates

Engineering & Technology / Chemical Engineering
chemical engineering | applied thermodynamics | separation technolog

H-Index Metrics

H-Index

55
i10 Index

107
Citation Counts

11,976

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* Total H Index Rankings

Rankings

152,968

World Rank

217

Country Rank

University

Ranking Based On Selection:

Kean Wang

Khalifa University of Science and Technology Abu Dhabi, United Arab Emirates

Engineering & Technology / Chemical Engineering
adsorption | membrane separation | water treatmen

H-Index Metrics

H-Index

40
i10 Index

86
Citation Counts

4,364

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* Total H Index Rankings

Rankings

174,347

World Rank

263

Country Rank

University

Ranking Based On Selection:

Mohammad Abu Zahra

Khalifa University of Science and Technology Abu Dhabi, United Arab Emirates

Engineering & Technology / Chemical Engineering
Carbon capture | CO2 Utilization | Clean energy | Reactive Separation | Advance Material

H-Index Metrics

H-Index

37
i10 Index

79
Citation Counts

7,275

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* Total H Index Rankings

Rankings

175,325

World Rank

265

Country Rank

University

Ranking Based On Selection:

Georgios Karanikolos

Khalifa University of Science and Technology Abu Dhabi, United Arab Emirates

Engineering & Technology / Chemical Engineering
Adsorption | Advanced separations | CCUS | Atmospheric water harvesting | Hydrogen storag

H-Index Metrics

H-Index

37
i10 Index

95
Citation Counts

4,502

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* Total H Index Rankings

Rankings

217,299

World Rank

335

Country Rank

University

Ranking Based On Selection:

Abdul Hai

Khalifa University of Science and Technology Abu Dhabi, United Arab Emirates

Engineering & Technology / Chemical Engineering
capacitive deionization | membrane separation | catalysis | pyrolysis | CO2 conversio

H-Index Metrics

H-Index

33
i10 Index

46
Citation Counts

2,988

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* Total H Index Rankings

Rankings

292,055

World Rank

493

Country Rank

124

University

Ranking Based On Selection:

Hanifa Taher

Khalifa University of Science and Technology Abu Dhabi, United Arab Emirates

Engineering & Technology / Chemical Engineering
Biodiesel Production | Green Solvents | Chemical Engineering | Supercritical Fluid Technology | oil spills cleanu