| Classification of liptinite–ICCP System 1994 W Pickel, J Kus, D Flores, S Kalaitzidis, K Christanis, BJ Cardott, ... International Journal of Coal Geology 169, 40-61, 2017 | 671 | 2017 |
| On the fundamental difference between coal rank and coal type JMK O'Keefe, A Bechtel, K Christanis, S Dai, WA DiMichele, CF Eble, ... International Journal of Coal Geology 118, 58-87, 2013 | 365 | 2013 |
| Raman spectroscopy for the analysis of coal: a review S Potgieter‐Vermaak, N Maledi, N Wagner, JHP Van Heerden, ... Journal of Raman Spectroscopy 42 (2), 123-129, 2011 | 318 | 2011 |
| The occurrence of potentially hazardous trace elements in five Highveld coals, South Africa NJ Wagner, B Hlatshwayo International Journal of Coal Geology 63 (3-4), 228-246, 2005 | 193 | 2005 |
| Elemental and mineralogical anomalies in the coal-hosted Ge ore deposit of Lincang, Yunnan, southwestern China: Key role of N2–CO2-mixed hydrothermal solutions S Dai, P Wang, CR Ward, Y Tang, X Song, J Jiang, JC Hower, T Li, ... International Journal of Coal Geology 152, 19-46, 2015 | 177 | 2015 |
| Gaseous emissions and sublimates from the Truman Shepherd coal fire, Floyd County, Kentucky: a re-investigation following attempted mitigation of the fire JC Hower, JMK O'Keefe, KR Henke, NJ Wagner, G Copley, DR Blake, ... International Journal of Coal Geology 116, 63-74, 2013 | 135 | 2013 |
| Characterization of unburned carbon present in coarse gasification ash NJ Wagner, RH Matjie, JH Slaghuis, JHP Van Heerden Fuel 87 (6), 683-691, 2008 | 124 | 2008 |
| Investigation into the evolution of char structure using Raman spectroscopy in conjunction with coal petrography; Part 1 VP Chabalala, N Wagner, S Potgieter-Vermaak Fuel Processing Technology 92 (4), 750-756, 2011 | 120 | 2011 |
| A CO2 capture technology using multi-walled carbon nanotubes with polyaspartamide surfactant JM Ngoy, N Wagner, L Riboldi, O Bolland Energy Procedia 63, 2230-2248, 2014 | 117 | 2014 |
| Geochemistry of ultra-fine and nano-compounds in coal gasification ashes: a synoptic view MA Kronbauer, M Izquierdo, S Dai, FB Waanders, NJ Wagner, ... Science of the total environment 456, 95-103, 2013 | 106 | 2013 |
| Distribution of selected trace elements in density fractionated Waterberg coals from South Africa NJ Wagner, MT Tlotleng International Journal of Coal Geology 94, 225-237, 2012 | 86 | 2012 |
| Rare earth elements in select Main Karoo Basin (South Africa) coal and coal ash samples NJ Wagner, A Matiane International Journal of Coal Geology 196, 82-92, 2018 | 83 | 2018 |
| Coal gasification NJ Wagner, M Coertzen, RH Matjie, JC van Dyk Applied coal petrology, 119-144, 2008 | 72 | 2008 |
| An investigation of Wulantuga coal (Cretaceous, Inner Mongolia) macerals: paleopathology of faunal and fungal invasions into wood and the recognizable clues for their activity JC Hower, JMK O'Keefe, NJ Wagner, S Dai, X Wang, W Xue International Journal of Coal Geology 114, 44-53, 2013 | 66 | 2013 |
| Structural analysis of chars generated from South African inertinite coals in a pipe-reactor combustion unit N Malumbazo, NJ Wagner, JR Bunt, D Van Niekerk, H Assumption Fuel processing technology 92 (4), 743-749, 2011 | 52 | 2011 |
| Notes on the mechanisms of coal metamorphism in the Pennsylvania Anthracite Fields JC Hower, SM Rimmer, M Mastalerz, NJ Wagner International Journal of Coal Geology 202, 161-170, 2019 | 38 | 2019 |
| Development of a petrographic classification of fly-ash components from coal combustion and co-combustion.(An ICCP Classification System, Fly-Ash Working Group–Commission III.) I Suárez-Ruiz, B Valentim, AG Borrego, A Bouzinos, D Flores, ... International Journal of Coal Geology 183, 188-203, 2017 | 38 | 2017 |
| Synthesis and evaluation of carbon nanotubes composite adsorbent for CO2 capture: a comparative study of CO2 adsorption capacity of single-walled and multi … K Osler, D Dheda, J Ngoy, N Wagner, MO Daramola International Journal of Coal Science & Technology 4, 41-49, 2017 | 36 | 2017 |
| Full-plant analysis of a PSA CO2 capture unit integrated in coal-fired power plants: post-and pre-combustion scenarios L Riboldi, O Bolland, JM Ngoy, N Wagner Energy Procedia 63, 2289-2304, 2014 | 36 | 2014 |
| Testing reproducibility of vitrinite and solid bitumen reflectance measurements in North American unconventional source-rock reservoir petroleum systems PC Hackley, CV Araujo, AG Borrego, A Bouzinos, BJ Cardott, ... Marine and Petroleum Geology 114, 104172, 2020 | 35 | 2020 |
