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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 56 11565 10414 3126 2555 269 11905

Theodore T. Tsotsis publications per year

The chart shows the history of publications by Theodore T. Tsotsis between 1979 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Theodore T. Tsotsis published across 47 years, from 1979 to 2025, averaging 6.6 papers a year. Output peaked at 16 publications in 2019. 9 of the 308 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1979 to 2025. Vertical axis: number of publications, 0 to 16. Peak 16 publications in 2019. 1979: 1 publication 1980: 0 publications 1981: 2 publications 1982: 5 publications 1983: 3 publications 1984: 5 publications 1985: 3 publications 1986: 4 publications 1987: 4 publications 1988: 7 publications 1989: 4 publications 1990: 7 publications 1991: 4 publications 1992: 9 publications 1993: 5 publications 1994: 6 publications 1995: 6 publications 1996: 5 publications 1997: 3 publications 1998: 3 publications 1999: 4 publications 2000: 5 publications 2001: 8 publications 2002: 6 publications 2003: 5 publications 2004: 13 publications 2005: 6 publications 2006: 9 publications 2007: 10 publications 2008: 8 publications 2009: 11 publications 2010: 6 publications 2011: 10 publications 2012: 7 publications 2013: 11 publications 2014: 12 publications 2015: 9 publications 2016: 5 publications 2017: 4 publications 2018: 7 publications 2019: 16 publications 2020: 15 publications 2021: 8 publications 2022: 7 publications 2023: 11 publications 2024: 5 publications 2025: 4 publications
1979 2025

308 publications in total across all disciplines

View publications per year as a table
Theodore T. Tsotsis: publications per year, 1979 to 2025
Year Publications
1979 1
1980 0
1981 2
1982 5
1983 3
1984 5
1985 3
1986 4
1987 4
1988 7
1989 4
1990 7
1991 4
1992 9
1993 5
1994 6
1995 6
1996 5
1997 3
1998 3
1999 4
2000 5
2001 8
2002 6
2003 5
2004 13
2005 6
2006 9
2007 10
2008 8
2009 11
2010 6
2011 10
2012 7
2013 11
2014 12
2015 9
2016 5
2017 4
2018 7
2019 16
2020 15
2021 8
2022 7
2023 11
2024 5
2025 4
Total 308
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Theodore T. Tsotsis publications per year - data summary

  • Theodore T. Tsotsis, a Chemistry scholar from University of Southern California, has 308 publications recorded across 47 years, from 1979 to 2025.
  • The oldest publication on record dates to 1979 and the most recent to 2025.
  • The most productive year is 2019, with 16 publications.
  • The least productive year with any output is 1979, with 1 publication.
  • 1 of the 47 years in the span carries no publications at all (1980).
  • The rate of publication averages 6.6 papers per year over the whole span, or 6.7 per year counting only the 46 years with at least one publication.
  • The last 5 years on the chart (2021-2025) hold 35 publications, 11% of the career total.
  • Split into equal eras - 1979-1994: 69 publications (4.3 per year); 1995-2010: 108 publications (6.8 per year); 2011-2025: 131 publications (8.7 per year).
  • Comparing the opening and closing eras, the overall trend of publication is rising.

Theodore T. Tsotsis publication distribution in Chemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Chemistry in 2026. The highlighted bar marks where Theodore T. Tsotsis sits on this spectrum.

No. of scientists
250 500 750 1,000 1,250
Bar chart with 63 bars. Horizontal axis: publications, 61–80 to 1,295+. Vertical axis: number of scientists, 0 to 1,350. Most scientists, 1,350, have 161–180 publications. The last bar groups every scientist with 1,295 publications or more. The highlighted bar, 261–280 publications, is where this scientist sits. 61–80 publications: 66 scientists 81–100 publications: 302 scientists 101–120 publications: 623 scientists 121–140 publications: 918 scientists 141–160 publications: 1,218 scientists 161–180 publications: 1,350 scientists 181–200 publications: 1,344 scientists 201–220 publications: 1,281 scientists 221–240 publications: 1,216 scientists 241–260 publications: 1,100 scientists 261–280 publications: 979 scientists 281–300 publications: 939 scientists 301–320 publications: 764 scientists 321–340 publications: 643 scientists 341–360 publications: 628 scientists 361–380 publications: 522 scientists 381–400 publications: 459 scientists 401–420 publications: 397 scientists 421–440 publications: 327 scientists 441–460 publications: 270 scientists 461–480 publications: 265 scientists 481–500 publications: 252 scientists 501–520 publications: 201 scientists 521–540 publications: 185 scientists 541–560 publications: 148 scientists 561–580 publications: 148 scientists 581–600 publications: 132 scientists 601–620 publications: 114 scientists 621–640 publications: 104 scientists 641–660 publications: 91 scientists 661–680 publications: 92 scientists 681–700 publications: 73 scientists 701–720 publications: 57 scientists 721–740 publications: 54 scientists 741–760 publications: 67 scientists 761–780 publications: 45 scientists 781–800 publications: 46 scientists 801–820 publications: 39 scientists 821–840 publications: 32 scientists 841–860 publications: 36 scientists 861–880 publications: 29 scientists 881–900 publications: 26 scientists 901–920 publications: 24 scientists 921–940 publications: 14 scientists 941–960 publications: 23 scientists 961–980 publications: 28 scientists 981–1,000 publications: 15 scientists 1,001–1,020 publications: 29 scientists 1,021–1,040 publications: 12 scientists 1,041–1,060 publications: 19 scientists 1,061–1,080 publications: 12 scientists 1,081–1,100 publications: 6 scientists 1,101–1,120 publications: 8 scientists 1,121–1,140 publications: 12 scientists 1,141–1,160 publications: 5 scientists 1,161–1,180 publications: 6 scientists 1,181–1,200 publications: 14 scientists 1,201–1,220 publications: 7 scientists 1,221–1,240 publications: 2 scientists 1,241–1,260 publications: 6 scientists 1,261–1,280 publications: 4 scientists 1,281–1,294 publications: 6 scientists 1,295+ publications: 100 scientists
61–80 publications 1,295+

This scientist: 269 publications — 55th percentile

55% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,295 publications or more.

View publications distribution as a table
Number of Chemistry scientists by publication count, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
Publications Scientists This scientist
61–80 66
81–100 302
101–120 623
121–140 918
141–160 1,218
161–180 1,350
181–200 1,344
201–220 1,281
221–240 1,216
241–260 1,100
261–280 979 269
281–300 939
301–320 764
321–340 643
341–360 628
361–380 522
381–400 459
401–420 397
421–440 327
441–460 270
461–480 265
481–500 252
501–520 201
521–540 185
541–560 148
561–580 148
581–600 132
601–620 114
621–640 104
641–660 91
661–680 92
681–700 73
701–720 57
721–740 54
741–760 67
761–780 45
781–800 46
801–820 39
821–840 32
841–860 36
861–880 29
881–900 26
901–920 24
921–940 14
941–960 23
961–980 28
981–1,000 15
1,001–1,020 29
1,021–1,040 12
1,041–1,060 19
1,061–1,080 12
1,081–1,100 6
1,101–1,120 8
1,121–1,140 12
1,141–1,160 5
1,161–1,180 6
1,181–1,200 14
1,201–1,220 7
1,221–1,240 2
1,241–1,260 6
1,261–1,280 4
1,281–1,294 6
1,295+ 100
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Theodore T. Tsotsis publication distribution in Chemistry in 2026 - data summary

  • The chart plots the publication count of all 17,934 Chemistry scientists ranked by Research.com in 2026, grouped into 63 ranges running from 61–80 to 1,295+ publications.
  • Theodore T. Tsotsis, a Chemistry scholar from University of Southern California, records 269 publications - the 55th percentile of the discipline.
  • 55% of ranked Chemistry scientists score the same or lower than Theodore T. Tsotsis, and about 45% score higher.
  • The median of the discipline falls in the 241–260 publications range, and Theodore T. Tsotsis ranks above the median.
  • The most crowded range is 161–180 publications, holding 1,350 scientists (8% of the field).
  • 77% of the field sits in the lowest quarter of the value range (up to 361–380 publications), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 1,295 publications or more, 100 scientists in all (<1% of the field).

Theodore T. Tsotsis D-index placement in Chemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Chemistry scientists ranked by Research.com in 2026. The highlighted bar marks where Theodore T. Tsotsis sits on this spectrum.

No. of scientists
250 500 750 1,000
Bar chart with 61 bars. Horizontal axis: D-Index, 40–41 to 159+. Vertical axis: number of scientists, 0 to 1,051. Most scientists, 1,051, have 56–57 D-Index. The last bar groups every scientist with 159 D-Index or more. The highlighted bar, 56–57 D-Index, is where this scientist sits. 40–41 D-Index: 289 scientists 42–43 D-Index: 612 scientists 44–45 D-Index: 808 scientists 46–47 D-Index: 776 scientists 48–49 D-Index: 835 scientists 50–51 D-Index: 861 scientists 52–53 D-Index: 872 scientists 54–55 D-Index: 933 scientists 56–57 D-Index: 1,051 scientists 58–59 D-Index: 930 scientists 60–61 D-Index: 882 scientists 62–63 D-Index: 834 scientists 64–65 D-Index: 731 scientists 66–67 D-Index: 775 scientists 68–69 D-Index: 683 scientists 70–71 D-Index: 646 scientists 72–73 D-Index: 561 scientists 74–75 D-Index: 501 scientists 76–77 D-Index: 437 scientists 78–79 D-Index: 388 scientists 80–81 D-Index: 354 scientists 82–83 D-Index: 292 scientists 84–85 D-Index: 275 scientists 86–87 D-Index: 254 scientists 88–89 D-Index: 235 scientists 90–91 D-Index: 185 scientists 92–93 D-Index: 192 scientists 94–95 D-Index: 155 scientists 96–97 D-Index: 163 scientists 98–99 D-Index: 125 scientists 100–101 D-Index: 105 scientists 102–103 D-Index: 105 scientists 104–105 D-Index: 112 scientists 106–107 D-Index: 88 scientists 108–109 D-Index: 68 scientists 110–111 D-Index: 69 scientists 112–113 D-Index: 65 scientists 114–115 D-Index: 79 scientists 116–117 D-Index: 61 scientists 118–119 D-Index: 44 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 40 scientists 124–125 D-Index: 33 scientists 126–127 D-Index: 26 scientists 128–129 D-Index: 34 scientists 130–131 D-Index: 35 scientists 132–133 D-Index: 25 scientists 134–135 D-Index: 27 scientists 136–137 D-Index: 17 scientists 138–139 D-Index: 16 scientists 140–141 D-Index: 20 scientists 142–143 D-Index: 20 scientists 144–145 D-Index: 15 scientists 146–147 D-Index: 9 scientists 148–149 D-Index: 9 scientists 150–151 D-Index: 16 scientists 152–153 D-Index: 11 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 3 scientists 158 D-Index: 3 scientists 159+ D-Index: 98 scientists
40–41 D-Index 159+

This scientist: 56 D-Index — 36th percentile

36% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 159 D-Index or more.

View D-Index distribution as a table
Number of Chemistry scientists by D-index, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
D-Index Scientists This scientist
40–41 289
42–43 612
44–45 808
46–47 776
48–49 835
50–51 861
52–53 872
54–55 933
56–57 1,051 56
58–59 930
60–61 882
62–63 834
64–65 731
66–67 775
68–69 683
70–71 646
72–73 561
74–75 501
76–77 437
78–79 388
80–81 354
82–83 292
84–85 275
86–87 254
88–89 235
90–91 185
92–93 192
94–95 155
96–97 163
98–99 125
100–101 105
102–103 105
104–105 112
106–107 88
108–109 68
110–111 69
112–113 65
114–115 79
116–117 61
118–119 44
120–121 37
122–123 40
124–125 33
126–127 26
128–129 34
130–131 35
132–133 25
134–135 27
136–137 17
138–139 16
140–141 20
142–143 20
144–145 15
146–147 9
148–149 9
150–151 16
152–153 11
154–155 9
156–157 3
158 3
159+ 98
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Theodore T. Tsotsis D-index placement in Chemistry in 2026 - data summary

  • The chart plots the discipline H-index (D-index) of all 17,934 Chemistry scientists ranked by Research.com in 2026, grouped into 61 ranges running from 40–41 to 159+ D-Index.
  • Theodore T. Tsotsis, a Chemistry scholar from University of Southern California, records 56 D-Index - the 36th percentile of the discipline.
  • 36% of ranked Chemistry scientists score the same or lower than Theodore T. Tsotsis, and about 64% score higher.
  • The median of the discipline falls in the 62–63 D-Index range, and Theodore T. Tsotsis ranks below the median.
  • The most crowded range is 56–57 D-Index, holding 1,051 scientists (6% of the field).
  • 70% of the field sits in the lowest quarter of the value range (up to 70–71 D-Index), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 159 D-Index or more, 98 scientists in all (<1% of the field).

Overview

Theodore T. Tsotsis is affiliated with the University of Southern California in the United States. Their research primarily focuses on engineering disciplines, specifically within the subfields of mechanical engineering, mechanics of materials, biomedical engineering, catalysis, and ocean engineering.

Their work spans multiple key topics, including:

  • Hydrocarbon exploration and reservoir analysis
  • CO2 sequestration and geologic interactions
  • Membrane separation and gas transport
  • Catalysts for methane reforming
  • Carbon dioxide capture technologies
  • Hydraulic fracturing and reservoir analysis
  • Coal properties and utilization

Frequent venues for publication include:

  • Industrial & Engineering Chemistry Research
  • Chemical Engineering Journal
  • Chemical Engineering and Processing - Process Intensification
  • International Journal of Hydrogen Energy
  • Journal of Membrane Science

Recent papers authored or co-authored by Theodore T. Tsotsis feature diverse research themes in energy and environmental engineering:

  • Impacts of the subsurface storage of natural gas and hydrogen mixtures, 2020, International Journal of Hydrogen Energy
  • A carbon molecular sieve membrane-based reactive separation process for pre-combustion CO2 capture, 2020, Journal of Membrane Science
  • CO2 induced changes in Mount Simon sandstone: Understanding links to post CO2 injection monitoring, seismicity, and reservoir integrity, 2020, International Journal of Greenhouse Gas Control
  • Influence of geochemical reactions on the creep behavior of Mt. Simon sandstone, 2020, International Journal of Greenhouse Gas Control
  • A reactive separation process for pre-combustion CO2 capture employing oxygen-blown coal gasifier off-gas, 2020, Chemical Engineering Journal

Tsotsis's collaboration network includes several frequent co-authors, such as Kristian Jessen, Zhuofan Shi, Linghao Zhao, Vasilios I. Manousiouthakis, and Malancha Gupta. These collaborators have contributed to multiple joint publications, indicating sustained research partnerships.

Best Publications

  • Statistical and continuum models of fluid-solid reactions in porous media

    Muhammad Sahimi;George R. Gavalas;Theodore T. Tsotsis

  • A study by in situ techniques of the thermal evolution of the structure of a Mg–Al–CO3 layered double hydroxide

    Weishen Yang;Yongman Kim;Paul K.T. Liu;Muhammad Sahimi

  • Electrochemical Reaction Dynamics - A Review

    J.L. Hudson;T.T. Tsotsis

  • Catalytic Membranes and Membrane Reactors

    José G. Sanchez Marcano;Theodore T. Tsotsis

  • Removal of Trace Levels of Arsenic and Selenium from Aqueous Solutions by Calcined and Uncalcined Layered Double Hydroxides (LDH)

    Li Yang;Zoya Shahrivari;Paul K. T. Liu;Muhammad Sahimi

  • Catalytic ceramic membrane steam-hydrocarbon reformer

    Ronald G. Minet;Theodore T. Tsotsis

  • An experimental investigation of spontaneous imbibition in gas shales

    B. Roychaudhuri;T.T. Tsotsis;K. Jessen

  • Detailed chemical kinetic mechanism for surrogates of alternative jet fuels

    Chitralkumar V. Naik;Karthik V. Puduppakkam;Abhijit Modak;Ellen Meeks

  • Propagation and extinction of premixed dimethyl-ether/air flames

    Y.L. Wang;A.T. Holley;C. Ji;F.N. Egolfopoulos

  • FUNDAMENTAL AND ENVIRONMENTAL ASPECTS OF LANDFILL GAS UTILIZATION FOR POWER GENERATION

    W. Qin;F.N. Egolfopoulos;T.T. Tsotsis

  • Strain-rate effects on hydrogen-enhanced lean premixed combustion

    J.-Y Ren;W Qin;F.N Egolfopoulos;T.T Tsotsis

  • Experiments and Simulation of Transport and Separation of Gas Mixtures in Carbon Molecular Sieve Membranes

    Mehran G. Sedigh;William J. Onstot;Lifang Xu;Wildon L. Peng

  • Studies of C4 and C10 methyl ester flames

    Yang L. Wang;Qiyao Feng;Fokion N. Egolfopoulos;Theodore T. Tsotsis

  • Porous Silicon Carbide Sintered Substrates for High-Temperature Membranes

    Varaporn Suwanmethanond;Edward Goo;Paul K. T. Liu;George Johnston

  • Gas Generation, Transport, and Extraction in Landfills

    Sumadhu G. Arigala;Theodore T. Tsotsis;Ian A. Webster;Yanis C. Yortsos

  • Transport and morphological characteristics of polyetherimide-based carbon molecular sieve membranes

    Mehran G. Sedigh;Lifang Xu;Theodore T. Tsotsis;Muhammad Sahimi

  • Chemisorption, physisorption and hysteresis during hydrogen storage in carbon nanotubes

    Seyed Hamed Barghi;Theodore T. Tsotsis;Muhammad Sahimi

  • A percolation model of catalyst deactivation by site coverage and pore blockage

    Muhammad Sahimi;Theodore T. Tsotsis

  • Impacts of the subsurface storage of natural gas and hydrogen mixtures

    Zhuofan Shi;Kristian Jessen;Theodore T. Tsotsis

  • Silicon carbide membranes for gas separation applications

    Bahman Elyassi;Muhammad Sahimi;Theodore T. Tsotsis

  • A continuous pervaporation membrane reactor for the study of esterification reactions using a composite polymeric/ceramic membrane

    Y. Zhu;R.G. Minet;T.T. Tsotsis

  • Nonequilibrium Molecular Dynamics Simulation of Transport of Gas Mixtures in Nanopores

    Lifang Xu;Mehran G. Sedigh;Muhammad Sahimi;Theodore T. Tsotsis

Frequent Co-Authors

Muhammad Sahimi
Muhammad Sahimi University of Southern California
Fokion N. Egolfopoulos
Fokion N. Egolfopoulos University of Southern California
Charles J. Werth
Charles J. Werth The University of Texas at Austin
Marc-Olivier Coppens
Marc-Olivier Coppens University College London
William A. Goddard
William A. Goddard California Institute of Technology
Sidney W. Benson
Sidney W. Benson SRI International
Angela Goodman
Angela Goodman National Energy Technology Laboratory
S. Joe Qin
S. Joe Qin Lingnan University
Weishen Yang
Weishen Yang Dalian Institute of Chemical Physics
Matthias Ihme
Matthias Ihme Stanford University

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