| Polymer composites and self-healing | 1160 |
| Atmospheric and Environmental Gas Dynamics | 1154 |
| Methane Hydrates and Related Phenomena | 1012 |
| Catalytic Processes in Materials Science | 928 |
| Catalysis and Oxidation Reactions | 747 |
| Catalysts for Methane Reforming | 677 |
| Hydrocarbon exploration and reservoir analysis | 581 |
| Anaerobic Digestion and Biogas Production | 467 |
| Coal Properties and Utilization | 372 |
| Ruminant Nutrition and Digestive Physiology | 369 |
| Carbon dioxide utilization in catalysis | 293 |
| Biodegradable Polymer Synthesis and Properties | 274 |
| Advanced Sensor and Energy Harvesting Materials | 233 |
| Combustion and flame dynamics | 224 |
| Advanced Combustion Engine Technologies | 224 |
| Flame retardant materials and properties | 216 |
| Spectroscopy and Laser Applications | 213 |
| Electrospun Nanofibers in Biomedical Applications | 211 |
| Atmospheric chemistry and aerosols | 206 |
| Genomics and Phylogenetic Studies | 192 |