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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 44 16723 15098 4147 3406 125 8500

Ranjani Siriwardane publications per year

The chart shows the history of publications by Ranjani Siriwardane between 1981 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Ranjani Siriwardane published across 45 years, from 1981 to 2025, averaging 3.2 papers a year. Output peaked at 8 publications in 2013. 8 of the 142 publications appeared in the last two years.

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

142 publications in total across all disciplines

View publications per year as a table
Ranjani Siriwardane: publications per year, 1981 to 2025
Year Publications
1981 1
1982 0
1983 4
1984 1
1985 3
1986 1
1987 2
1988 1
1989 1
1990 3
1991 1
1992 0
1993 1
1994 2
1995 1
1996 0
1997 1
1998 0
1999 2
2000 3
2001 2
2002 2
2003 6
2004 1
2005 3
2006 2
2007 7
2008 4
2009 5
2010 6
2011 7
2012 6
2013 8
2014 6
2015 8
2016 2
2017 3
2018 8
2019 4
2020 6
2021 4
2022 1
2023 5
2024 5
2025 3
Total 142
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Ranjani Siriwardane 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 Ranjani Siriwardane 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, 121–140 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: 125 publications — 7th percentile

7% 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
121–140 918 125
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
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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Ranjani Siriwardane 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 Ranjani Siriwardane 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, 44–45 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: 44 D-Index — 7th percentile

7% 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 44
46–47 776
48–49 835
50–51 861
52–53 872
54–55 933
56–57 1,051
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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Overview

Ranjani Siriwardane is affiliated with the United States Department of Energy in the United States. Their research primarily spans the fields of Engineering and Materials Science, with a strong focus on specialized subfields, including Biomedical Engineering, Materials Chemistry, Mechanical Engineering, Catalysis, and Renewable Energy, Sustainability and the Environment.

The main topics of their work are centered around Chemical Looping and Thermochemical Processes, which constitutes a significant portion of their publications. Additional subjects include Catalysts for Methane Reforming, Industrial Gas Emission Control, Oil, Gas, and Environmental Issues, Thermal and Kinetic Analysis, Catalytic Processes in Materials Science, and Thermochemical Biomass Conversion Processes.

Ranjani Siriwardane's recent published papers reflect this focus, appearing mainly in domains related to energy and materials science. Notable papers include:

  • "Technoeconomic analysis for hydrogen and carbon Co-Production via catalytic pyrolysis of methane" (2021) published in the International Journal of Hydrogen Energy
  • "Investigation of methane and ethane pyrolysis with highly active and durable iron-alumina catalyst to produce hydrogen and valuable nano carbons: Continuous fluidized bed tests and reaction rate analysis" (2023) published in the International Journal of Hydrogen Energy
  • "Bench scale analysis of the physical attrition properties for copper-ferri-aluminate oxygen carriers during chemical looping combustion" (2020) published in Powder Technology
  • "Development of CuFeMnAlO4+δ oxygen carrier with high attrition resistance and 50-kWth methane/air chemical looping combustion tests" (2021) published in Applied Energy
  • "A particle-scale reduction model of copper iron manganese oxide with CO for chemical looping combustion" (2020) published in Applied Energy

The frequent coauthors collaborating with Siriwardane provide insight into their research network. These include Jarrett Riley, Chris Atallah, James Poston, Michael Bobek, and William Benincosa.

Key publication venues contributing to their academic output include:

  • Microscopy and Microanalysis
  • International Journal of Hydrogen Energy
  • Applied Energy
  • Energy & Fuels
  • Powder Technology

Best Publications

  • Adsorption of CO2 on molecular sieves and activated carbon

    Ranjani V. Siriwardane;Ming-Shing Shen;Edward P. Fisher;James A. Poston

  • Adsorption of CO2 on Zeolites at Moderate Temperatures

    Ranjani V. Siriwardane;Ming-Shing Shen;Edward P. Fisher;James Losch

  • Optimization of a Pressure-Swing Adsorption Process Using Zeolite 13X for CO2 Sequestration

    Daeho Ko;Ranjani Siriwardane;Lorenz T. Biegler

  • Adsorption of CO2, N2, and O2 on Natural Zeolites

    Ranjani V. Siriwardane;Ming-Shing Shen;Edward P. Fisher

  • In situ Fourier transform infrared (FTIR) investigation of CO2 adsorption onto zeolite materials

    Robert W. Stevens;Ranjani V. Siriwardane;Jennifer Logan

  • Decomposition of the sulfates of copper, iron (II), iron (III), nickel, and zinc: XPS, SEM, DRIFTS, XRD, and TGA study

    Ranjani V Siriwardane;James A Poston;Edward P Fisher;Ming-Shing Shen

  • Optimization of Pressure Swing Adsorption and Fractionated Vacuum Pressure Swing Adsorption Processes for CO2 Capture

    Daeho Ko;Ranjani Siriwardane;Lorenz T. Biegler

  • Chemical-Looping Combustion of Coal with Metal Oxide Oxygen Carriers

    Ranjani Siriwardane;Hanjing Tian;George Richards;Thomas Simonyi

  • Kinetics of Magnetite (Fe3O4) Oxidation to Hematite (Fe2O3) in Air for Chemical Looping Combustion

    Esmail R. Monazam;Ronald W. Breault;Ranjani Siriwardane

  • Monte Carlo simulation of single- and binary-component adsorption of CO2, N2, and H2 in zeolite Na-4A

    E. Demet Akten;Ranjani Siriwardane;David S. Sholl

  • Kinetics of the reduction of hematite (Fe2O3) by methane (CH4) during chemical looping combustion: A global mechanism

    Esmail R. Monazam;Ronald W. Breault;Ranjani Siriwardane;George Richards

  • Reduction of hematite (Fe2O3) to wüstite (FeO) by carbon monoxide (CO) for chemical looping combustion

    Esmail R. Monazam;Ronald W. Breault;Ranjani Siriwardane

  • Synergetic effects of mixed copper–iron oxides oxygen carriers in chemical looping combustion

    Ranjani Siriwardane;Hanjing Tian;Thomas Simonyi;James Poston

  • Chemical looping coal gasification with calcium ferrite and barium ferrite via solid–solid reactions

    Ranjani Siriwardane;Jarrett Riley;Jarrett Riley;Hanjing Tian;Hanjing Tian;George Richards

  • Interactions of SO2 with sodium deposited on silica

    Ranjani V Siriwardane;Ranjani V Siriwardane;Jason M Cook;Jason M Cook

  • Novel Regenerable Sodium-Based Sorbents for CO2 Capture at Warm Gas Temperatures

    Ranjani V. Siriwardane;Clark Robinson;Ming Shen;Tom Simonyi

  • Novel Regenerable Magnesium Hydroxide Sorbents for CO2 Capture at Warm Gas Temperatures

    Ranjani V. Siriwardane;Robert W. Stevens

  • Evaluation of reaction mechanism of coal-metal oxide interactions in chemical-looping combustion

    Ranjani Siriwardane;Hanjing Tian;Duane Miller;George Richards

  • Thermal decomposition of the rare earth sulfates of cerium(III), cerium(IV), lanthanum(III) and samarium(III)

    James A. Poston;Ranjani V. Siriwardane;Edward P. Fisher;Angela L. Miltz

  • Regenerable sorbents for CO2 capture from moderate and high temperature gas streams

    Ranjani V. Siriwardane

Frequent Co-Authors

Lorenz T. Biegler
Lorenz T. Biegler Carnegie Mellon University
J. Karl Johnson
J. Karl Johnson University of Pittsburgh
James J. Spivey
James J. Spivey Louisiana State University
Robert M. Enick
Robert M. Enick University of Pittsburgh
David S. Sholl
David S. Sholl Georgia Institute of Technology
Jinhu Wu
Jinhu Wu Chinese Academy of Sciences

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