World's Best Scientists 2026 revealed!
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Engineering and Technology
USA
2026

D-Index & Metrics

Biology and Biochemistry

D-Index
103
Citations
39147
World Ranking
1314
National Ranking
769

Engineering and Technology

D-Index
108
Citations
41984
World Ranking
91
National Ranking
34

Roger Ruan 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 Roger Ruan 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: 570 publications — 96th percentile

96% of scientists in this discipline score the same or lower.

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

Roger Ruan 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 Roger Ruan 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: 108 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 United States Leader Award
  • 2025 - Research.com Engineering and Technology in United States Leader Award

Overview

Roger Ruan is affiliated with the University of Minnesota in the United States and has contributed extensively to the field of engineering, particularly within biomedical engineering, renewable energy, sustainability and the environment, mechanical engineering, industrial and manufacturing engineering, and pollution.

Their research addresses several main topics, including thermochemical biomass conversion processes, algal biology and biofuel production, catalysis and hydrodesulfurization studies, recycling and waste management techniques, catalysis for biomass conversion, lignin and wood chemistry, and biodiesel production and applications.

Roger Ruan has published frequently in a range of scientific venues. The most common publication outlets include:

  • Bioresource Technology
  • Chemical Engineering Journal
  • Journal of Cleaner Production
  • The Science of The Total Environment
  • SSRN Electronic Journal

Significant recent papers authored by Roger Ruan comprise:

  • "Photocatalytic degradation of organic pollutants using TiO2-based photocatalysts: A review" (2020, Journal of Cleaner Production)
  • "A review on catalytic pyrolysis of plastic wastes to high-value products" (2022, Energy Conversion and Management)
  • "Plastic waste upcycling toward a circular economy" (2021, Chemical Engineering Journal)
  • "Pyrolysis technology for plastic waste recycling: A state-of-the-art review" (2022, Progress in Energy and Combustion Science)
  • "Catalytic pyrolysis of plastic wastes in a continuous microwave assisted pyrolysis system for fuel production" (2021, Chemical Engineering Journal)

Frequent collaborators include researchers Yuhuan Liu, Yunpu Wang, Leilei Dai, and Kirk Cobb, each contributing to a notable number of joint publications.

Roger Ruan has also authored a book titled Environmental Pollution Governance and Ecological Remediation Technology, published by Springer Nature in 2023.

Best Publications

  • Photocatalytic degradation of organic pollutants using TiO2-based photocatalysts: A review

    Dongjie Chen;Yanling Cheng;Nan Zhou;Paul Chen

  • Cultivation of green algae Chlorella sp. in different wastewaters from municipal wastewater treatment plant.

    Liang Wang;Min Min;Yecong Li;Paul Chen

  • Characterization of a microalga Chlorella sp. well adapted to highly concentrated municipal wastewater for nutrient removal and biodiesel production

    Yecong Li;Yi-Feng Chen;Paul Chen;Min Min

  • ANAEROBIC DIGESTED DAIRY MANURE AS A NUTRIENT SUPPLEMENT FOR CULTIVATION OF OIL-RICH GREEN MICROALGAE CHLORELLA SP

    Liang Wang;Yecong Li;Paul Chen;Min Min

  • Microalgae-based wastewater treatment for nutrients recovery: A review

    Kun Li;Qiang Liu;Fan Fang;Ruihuan Luo

  • A review of catalytic hydrodeoxygenation of lignin-derived phenols from biomass pyrolysis.

    Quan Bu;Hanwu Lei;Alan H. Zacher;Lu Wang

  • A review on catalytic pyrolysis of plastic wastes to high-value products

    Unknown

  • Culture of Microalgae Chlamydomonas reinhardtii in Wastewater for Biomass Feedstock Production

    Qing Xue Kong;Ling Li;Ling Li;Blanca Martinez;Paul Chen

  • Pyrolysis technology for plastic waste recycling: A state-of-the-art review

    Unknown

  • Local bioprospecting for high-lipid producing microalgal strains to be grown on concentrated municipal wastewater for biofuel production

    Wenguang Zhou;Yecong Li;Min Min;Bing Hu

  • Microwave-assisted pyrolysis of microalgae for biofuel production

    Zhenyi Du;Yecong Li;Xiaoquan Wang;Yiqin Wan;Yiqin Wan

  • Mixotrophic cultivation of Chlorella vulgaris and its potential application for the oil accumulation from non-sugar materials

    Tamarys Heredia-Arroyo;Wei Wei;Roger Ruan;Bo Hu

  • Plastic waste upcycling toward a circular economy

    Xianhui Zhao;Matthew Korey;Kai Li;Katie Copenhaver

  • Polylactic acid (PLA) synthesis and modifications: a review

    Yanling Cheng;Yanling Cheng;Shaobo Deng;Paul Chen;Roger Ruan

  • Microwave-assisted pyrolysis of biomass: Catalysts to improve product selectivity

    Yiqin Wan;Yiqin Wan;Paul Chen;Bo Zhang;Changyang Yang

  • Review of biological and engineering aspects of algae to fuels approach

    Paul Chen;Min Min;YiFeng Chen;Liang Wang

  • Inactivation of Escherichia coli on almonds using nonthermal plasma.

    Shaobo Deng;Roger Ruan;Chul Kyoon Mok;Guangwei Huang

  • Integration of algae cultivation as biodiesel production feedstock with municipal wastewater treatment: strains screening and significance evaluation of environmental factors.

    Yecong Li;Wenguang Zhou;Bing Hu;Min Min

  • Bio-mitigation of carbon dioxide using microalgal systems: Advances and perspectives

    Wenguang Zhou;Jinghan Wang;Jinghan Wang;Paul Chen;Chengcheng Ji

  • Jet fuel production from waste plastics via catalytic pyrolysis with activated carbons

    Yayun Zhang;Yayun Zhang;Dengle Duan;Hanwu Lei;Elmar Villota

  • Novel Fungal Pelletization-Assisted Technology for Algae Harvesting and Wastewater Treatment

    Wenguang Zhou;Yanling Cheng;Yanling Cheng;Yun Li;Yun Li;Yiqin Wan

  • A hetero-photoautotrophic two-stage cultivation process to improve wastewater nutrient removal and enhance algal lipid accumulation

    Wenguang Zhou;Min Min;Yecong Li;Bing Hu

  • Production of phenols and biofuels by catalytic microwave pyrolysis of lignocellulosic biomass.

    Quan Bu;Hanwu Lei;Shoujie Ren;Lu Wang

Frequent Co-Authors

Paul Chen
Paul Chen University of Minnesota
Yuhuan Liu
Yuhuan Liu Nanchang University
Hanwu Lei
Hanwu Lei Washington State University
Wenguang Zhou
Wenguang Zhou Nanchang University
Jinhui Peng
Jinhui Peng Kunming University of Science and Technology
Arthur J. Ragauskas
Arthur J. Ragauskas University of Tennessee at Knoxville
Chi Chen
Chi Chen University of Minnesota
Shulin Chen
Shulin Chen Washington State University
Gerald C Shurson
Gerald C Shurson University of Minnesota
Juming Tang
Juming Tang Washington State University

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