| Thermochemical Biomass Conversion Processes | Lifetime | 74 | CN 19 | 99.39 |
| Catalysis and Hydrodesulfurization Studies | Lifetime | 298 | CN 76 | 98.29 |
| Biodiesel Production and Applications | Lifetime | 249 | CN 36 | 98.12 |
| Coal and Its By-products | Lifetime | 151 | CN 54 | 97.45 |
| Municipal Solid Waste Management | Lifetime | 202 | CN 50 | 96.13 |
| Recycling and Waste Management Techniques | Lifetime | 757 | CN 190 | 95.53 |
| Catalysts for Methane Reforming | Lifetime | 687 | CN 196 | 95.96 |
| Anaerobic Digestion and Biogas Production | Lifetime | 958 | CN 261 | 92.62 |
| Subcritical and Supercritical Water Processes | Lifetime | 391 | CN 115 | 89.36 |
| Chemical Looping and Thermochemical Processes | Lifetime | 691 | CN 239 | 89.43 |
| Coal Combustion and Slurry Processing | Lifetime | 958 | CN 237 | 86.33 |
| Thermochemical Biomass Conversion Processes | 2021-2025 | 4 | CN 3 | 99.81 |
| Coal and Its By-products | 2021-2025 | 8 | CN 7 | 98.48 |
| Catalysis and Hydrodesulfurization Studies | 2021-2025 | 46 | CN 29 | 98.39 |
| Municipal Solid Waste Management | 2021-2025 | 39 | CN 13 | 97.34 |
| Anaerobic Digestion and Biogas Production | 2021-2025 | 77 | CN 44 | 96.96 |
| Catalytic Processes in Materials Science | 2021-2025 | 668 | CN 506 | 96.71 |
| Recycling and Waste Management Techniques | 2021-2025 | 316 | CN 118 | 95.64 |
| Catalysts for Methane Reforming | 2021-2025 | 247 | CN 133 | 94.23 |
| Lignin and Wood Chemistry | 2021-2025 | 229 | CN 154 | 94.65 |
| Industrial Gas Emission Control | 2021-2025 | 106 | CN 87 | 91.49 |
| Advanced oxidation water treatment | 2021-2025 | 471 | CN 357 | 93.57 |
| Phosphorus and nutrient management | 2021-2025 | 251 | CN 135 | 88.83 |
| Chemical Looping and Thermochemical Processes | 2021-2025 | 194 | CN 113 | 89.97 |
| Biodiesel Production and Applications | 2021-2025 | 526 | CN 84 | 90.26 |
| Biofuel production and bioconversion | 2021-2025 | 941 | CN 362 | 88.62 |
| Thermal and Kinetic Analysis | 2021-2025 | 271 | CN 153 | 88.85 |
| Catalysis and Oxidation Reactions | 2021-2025 | 994 | CN 654 | 88.00 |
| Environmental remediation with nanomaterials | 2021-2025 | 565 | CN 458 | 84.82 |
| Petroleum Processing and Analysis | 2021-2025 | 518 | CN 250 | 85.10 |
| Subcritical and Supercritical Water Processes | 2021-2025 | 150 | CN 93 | 82.71 |
| Flame retardant materials and properties | 2021-2025 | 971 | CN 768 | 74.43 |
| Heat transfer and supercritical fluids | 2021-2025 | 639 | CN 405 | 72.09 |
| Constructed Wetlands for Wastewater Treatment | 2021-2025 | 954 | CN 531 | 71.90 |
| Clay minerals and soil interactions | 2021-2025 | 850 | CN 330 | 68.68 |
| Process Optimization and Integration | 2021-2025 | 629 | CN 217 | 69.25 |
| Photovoltaic Systems and Sustainability | 2021-2025 | 515 | CN 77 | 62.18 |
| Coal Combustion and Slurry Processing | 2021-2025 | 684 | CN 310 | 61.39 |
| Healthcare and Environmental Waste Management | 2021-2025 | 856 | CN 74 | 50.71 |
| Electrokinetic Soil Remediation Techniques | 2021-2025 | 450 | CN 268 | 43.36 |
