World's Best Scientists 2026 revealed!
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Ayhan Demirbas
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Engineering and Technology
Saudi Arabia
2026

D-Index & Metrics

Engineering and Technology

D-Index
106
Citations
67467
World Ranking
103
National Ranking
2

Ayhan Demirbas publication distribution in Engineering and Technology in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Engineering and Technology in 2026. The highlighted bar marks where Ayhan Demirbas sits on this spectrum.

38–47 publications: 20 scientists 48–57 publications: 35 scientists 58–67 publications: 96 scientists 68–77 publications: 135 scientists 78–87 publications: 190 scientists 88–97 publications: 259 scientists 98–107 publications: 283 scientists 108–117 publications: 369 scientists 118–127 publications: 341 scientists 128–137 publications: 386 scientists 138–147 publications: 372 scientists 148–157 publications: 457 scientists 158–167 publications: 415 scientists 168–177 publications: 407 scientists 178–187 publications: 421 scientists 188–197 publications: 378 scientists 198–207 publications: 403 scientists 208–217 publications: 317 scientists 218–227 publications: 346 scientists 228–237 publications: 321 scientists 238–247 publications: 260 scientists 248–257 publications: 280 scientists 258–267 publications: 240 scientists 268–277 publications: 214 scientists 278–287 publications: 242 scientists 288–297 publications: 203 scientists 298–307 publications: 166 scientists 308–317 publications: 154 scientists 318–327 publications: 175 scientists 328–337 publications: 159 scientists 338–347 publications: 99 scientists 348–357 publications: 131 scientists 358–367 publications: 106 scientists 368–377 publications: 118 scientists 378–387 publications: 97 scientists 388–397 publications: 108 scientists 398–407 publications: 82 scientists 408–417 publications: 71 scientists 418–427 publications: 64 scientists 428–437 publications: 55 scientists 438–447 publications: 54 scientists 448–457 publications: 60 scientists 458–467 publications: 47 scientists 468–477 publications: 40 scientists 478–487 publications: 30 scientists 488–497 publications: 29 scientists 498–507 publications: 38 scientists 508–517 publications: 40 scientists 518–527 publications: 32 scientists 528–537 publications: 23 scientists 538–547 publications: 28 scientists 548–557 publications: 23 scientists 558–567 publications: 19 scientists 568–577 publications: 16 scientists 578–587 publications: 17 scientists 588–597 publications: 18 scientists 598–607 publications: 22 scientists 608–617 publications: 15 scientists 618–627 publications: 9 scientists 628–637 publications: 11 scientists 638–647 publications: 21 scientists 648–657 publications: 12 scientists 658–667 publications: 9 scientists 668–677 publications: 11 scientists 678–687 publications: 9 scientists 688–697 publications: 6 scientists 698–707 publications: 14 scientists 708–717 publications: 7 scientists 718–727 publications: 8 scientists 728–737 publications: 10 scientists 738–747 publications: 9 scientists 748–757 publications: 5 scientists 758–767 publications: 5 scientists 768–777 publications: 11 scientists 778–787 publications: 7 scientists 788–797 publications: 2 scientists 798–803 publications: 4 scientists 804+ publications: 100 scientists
38 publications 804+

This scientist: 463 publications — 93rd percentile

93% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 804 publications or more.

Ayhan Demirbas D-index placement in Engineering and Technology in 2026

The chart shows the D-index (discipline H-index) distribution of Engineering and Technology scientists ranked by Research.com in 2026. The highlighted bar marks where Ayhan Demirbas sits on this spectrum.

30 D-Index: 59 scientists 31 D-Index: 114 scientists 32 D-Index: 129 scientists 33 D-Index: 189 scientists 34 D-Index: 200 scientists 35 D-Index: 262 scientists 36 D-Index: 311 scientists 37 D-Index: 312 scientists 38 D-Index: 350 scientists 39 D-Index: 385 scientists 40 D-Index: 348 scientists 41 D-Index: 362 scientists 42 D-Index: 426 scientists 43 D-Index: 380 scientists 44 D-Index: 310 scientists 45 D-Index: 341 scientists 46 D-Index: 301 scientists 47 D-Index: 306 scientists 48 D-Index: 271 scientists 49 D-Index: 246 scientists 50 D-Index: 210 scientists 51 D-Index: 253 scientists 52 D-Index: 213 scientists 53 D-Index: 221 scientists 54 D-Index: 195 scientists 55 D-Index: 186 scientists 56 D-Index: 170 scientists 57 D-Index: 167 scientists 58 D-Index: 166 scientists 59 D-Index: 144 scientists 60 D-Index: 152 scientists 61 D-Index: 141 scientists 62 D-Index: 138 scientists 63 D-Index: 131 scientists 64 D-Index: 118 scientists 65 D-Index: 114 scientists 66 D-Index: 119 scientists 67 D-Index: 95 scientists 68 D-Index: 87 scientists 69 D-Index: 77 scientists 70 D-Index: 89 scientists 71 D-Index: 69 scientists 72 D-Index: 54 scientists 73 D-Index: 46 scientists 74 D-Index: 55 scientists 75 D-Index: 54 scientists 76 D-Index: 49 scientists 77 D-Index: 53 scientists 78 D-Index: 46 scientists 79 D-Index: 28 scientists 80 D-Index: 39 scientists 81 D-Index: 36 scientists 82 D-Index: 24 scientists 83 D-Index: 26 scientists 84 D-Index: 36 scientists 85 D-Index: 18 scientists 86 D-Index: 25 scientists 87 D-Index: 19 scientists 88 D-Index: 26 scientists 89 D-Index: 27 scientists 90 D-Index: 23 scientists 91 D-Index: 15 scientists 92 D-Index: 12 scientists 93 D-Index: 9 scientists 94 D-Index: 15 scientists 95 D-Index: 10 scientists 96 D-Index: 13 scientists 97 D-Index: 13 scientists 98 D-Index: 9 scientists 99 D-Index: 7 scientists 100 D-Index: 7 scientists 101 D-Index: 8 scientists 102 D-Index: 7 scientists 103 D-Index: 7 scientists 104 D-Index: 9 scientists 105 D-Index: 6 scientists 106 D-Index: 9 scientists 107+ D-Index: 99 scientists
30 D-Index 107+

This scientist: 106 D-Index — 99th percentile

99% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 107 D-Index or more.

Research.com Recognitions

  • 2026 - Research.com Engineering and Technology in Saudi Arabia Leader Award
  • 2025 - Research.com Engineering and Technology in Saudi Arabia Leader Award
  • 2022 - Research.com Engineering and Technology in Saudi Arabia Leader Award

Overview

Ayhan Demirbas is affiliated with King Abdulaziz University in Saudi Arabia. Their research contributions span various areas of engineering and environmental science, with a focus on microbial fuel cells, bioremediation, and geochemistry.

Their published work includes papers such as:

  • High-efficiency, environment-friendly moss-enriched microbial fuel cell (2022, International Journal of Chemical Reactor Engineering)
  • Editorial Board (2021, Biofuel Research Journal)
  • Editorial Board (2021, Biofuel Research Journal)
  • Editorial Board (2022, Biofuel Research Journal)
  • Editorial Board (2021, Biofuel Research Journal)

Demirbas frequently coauthors studies with the following researchers:

  • Yusuf Chisti
  • Ahmad Faisal Ismail
  • Seeram Ramakrishna
  • Solange I. Mussatto
  • Mortaza Aghbashlo

The primary venues where Demirbas publishes include:

  • Biofuel Research Journal
  • International Journal of Chemical Reactor Engineering

Their research focuses on topics such as:

  • Microbial Fuel Cells and Bioremediation
  • Metal Extraction and Bioleaching
  • Geochemistry and Elemental Analysis

Demirbas's work intersects with subfields including:

  • Environmental Engineering
  • Biomedical Engineering
  • Geochemistry and Petrology

Best Publications

  • Progress and recent trends in biodiesel fuels

    Ayhan Demirbas

  • Biomass resource facilities and biomass conversion processing for fuels and chemicals

    Ayhan Demirbaş

  • Progress and recent trends in biofuels

    Ayhan Demirbas

  • Combustion characteristics of different biomass fuels

    Ayhan Demirbas

  • Heavy metal adsorption onto agro-based waste materials: A review

    Ayhan Demirbas

  • A review on biomass as a fuel for boilers

    R. Saidur;E.A. Abdelaziz;A. Demirbas;M.S. Hossain

  • Biodiesel fuels from vegetable oils via catalytic and non-catalytic supercritical alcohol transesterifications and other methods: a survey

    Ayhan Demirbaş

  • Biofuels sources, biofuel policy, biofuel economy and global biofuel projections

    Ayhan Demirbas

  • Importance of biodiesel as transportation fuel

    Ayhan Demirbas

  • Potential applications of renewable energy sources, biomass combustion problems in boiler power systems and combustion related environmental issues

    Ayhan Demirbas

  • Political, economic and environmental impacts of biofuels: A review

    Ayhan Demirbas

  • Effects of temperature and particle size on bio-char yield from pyrolysis of agricultural residues

    Ayhan Demirbas

  • Biodiesel production from vegetable oils via catalytic and non-catalytic supercritical methanol transesterification methods

    Ayhan Demirbas

  • IMPORTANCE OF ALGAE OIL AS A SOURCE OF BIODIESEL

    Ayhan Demirbas;M. Fatih Demirbas

  • Mechanisms of liquefaction and pyrolysis reactions of biomass

    A. Demirbaş

  • Biodiesel: A Realistic Fuel Alternative for Diesel Engines

    Ayhan Demirbas

  • Calculation of higher heating values of biomass fuels

    Ayhan Demirbaş

  • Competitive liquid biofuels from biomass

    Ayhan Demirbas

  • An Overview of Biomass Pyrolysis

    Ayhan Demirbas;Gönenç Arin

  • Use of algae as biofuel sources.

    Ayhan Demirbas

  • Biofuels: Securing the Planet’s Future Energy Needs

    Ayhan Demirbas

  • Biodiesel from vegetable oils via transesterification in supercritical methanol

    Ayhan Demirbaş

Frequent Co-Authors

Ram B. Gupta
Ram B. Gupta Virginia Commonwealth University
Abdul-Sattar Nizami
Abdul-Sattar Nizami Government College University, Lahore
Mohammad Rehan
Mohammad Rehan King Abdulaziz University
Erol Pehlivan
Erol Pehlivan Konya Technical University
Mohamed Barakat
Mohamed Barakat King Abdulaziz University
Mortaza Aghbashlo
Mortaza Aghbashlo University of Tehran
Ahmet Sarı
Ahmet Sarı Karadeniz Technical University
Deepak Pant
Deepak Pant Flemish Institute for Technological Research
Rahman Saidur
Rahman Saidur Sunway University
Saad Mekhilef
Saad Mekhilef Swinburne University of Technology

External Links

Personal website of Ayhan Demirbas

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