| Initial letter | Keywords | Count |
|---|
| 0-9 | 5-hydroxymethylfurfural (3), 3D printing (3), 2,2'-bipyridine (1), 2'-Octoxyacetophenone (1), 3DIC (1), 3D imaging (1), etc. | 10 |  |
|---|
| A | Adsorption (11), ammonia (7), aqueous two-phase system (3), Antibody (3), Agglomeration (3), atomic layer deposition (3), etc. | 157 | |
|---|
| B | biomass (5), Biomethanation (3), bio-oil (3), Biochar (3), Biomass gasification (3), Biopharmaceuticals (2), etc. | 89 | |
|---|
| C-CH | CFD (8), carbon nanotube (8), catalyst (6), Carbon Neutral (6), Carbon dioxide (5), CCS (5), etc. | 157 | |
|---|
| CI-CZ | CO2 capture (12), Crystallization (8), CO2 (7), Computational Fluid Dynamics (6), COSMO-SAC (5), CO2 methanation (4), etc. | 171 | |
|---|
| D | Deep eutectic solvent (6), deep learning (6), Deep Tech (5), Direct Air Capture (4), Drying (4), Dehydration (4), etc. | 128 | |
|---|
| E | Escherichia coli (5), electrocatalysts (5), electrolysis (4), Extraction (4), economic evaluation (3), electrocatalyst (3), etc. | 108 | |
|---|
| F | Fischer-Tropsch synthesis (2), Flame spray pyrolysis (2), Fischer-Tropsch (2), Flue gas (2), Fast Pyrolysis Bio-Oil (2), Fluid Mechanics (2), etc. | 69 | |
|---|
| G | graphene (3), Green transformation (2), Green Hydrogen (2), Gas separation membrane (1), gap analyses (1), gel foams (1), etc. | 53 | |
|---|
| H | Hydrogen production (15), Hydrogen (11), Hydrogel (7), Hydrogen storage (5), hydrothermal synthesis (2), Hydrate (2), etc. | 128 | |
|---|
| I | I-V characteristics (2), interfacial affinity (2), ion gel (2), interfacial polymerization (2), intrinsic carbon defect (1), Intercalaton (1), etc. | 63 | |
|---|
| K | Knowledge Management (1), Key group (1), key parameters (1), kolbe electrolysis (1), kinetic parameters (1), kernel method (1), etc. | 8 | |
|---|
| L | liquid-liquid mixing (3), liposome (3), Lithium-ion battery (3), Lithium-ion batteries (3), Lithium-ion battery recycling (2), Life cycle assessment (2), etc. | 78 | |
|---|
| M-MH | Machine learning (36), Membrane (12), Metal-organic frameworks (11), Metabolic Engineering (9), mechanochemistry (5), Methane Fermentation (4), etc. | 154 | |
|---|
| MI-MZ | molecular dynamics (12), mixing (11), molecular dynamics simulation (5), Microalgae (3), microfluidic device (3), Morphology (2), etc. | 107 | |
|---|
| N | numerical simulation (12), Nanoparticles (4), nanoparticle (4), Neural Network (3), Nanofiltration (2), nucleation (2), etc. | 89 | |
|---|
| Non alphanumeric | * (17) | 17 | |
|---|
| O | Optimization (4), organic chelating ligand (2), Operations and Maintenance (2), organic ligand (1), organic solvent reverse osmosis (1), Ozonation (1), etc. | 43 | |
|---|
| P-PH | PFAS (6), Photocatalyst (3), pervaporation (3), phase equilibrium (2), Particle Size (2), peptide (2), etc. | 81 | |
|---|
| PI-PZ | Process simulation (9), polymer (5), Process modeling (5), Process design (3), Plot Plan (2), Plastic (2), etc. | 139 | |
|---|
| Q | Quadrupole Mass Spectrometry (1), Qualification system (1), Questionnaire Survey (1), quantitative visualization (1), Quantum computing (1) | 5 | |
|---|
| R | renewable energy (4), Redox flow battery (4), Recycling (4), Rotating bed (3), Regenerative medicine (3), Recycle (3), etc. | 84 | |
|---|
| S-SO | seawater electrolysis (4), Simulation (4), slug flow (4), Softsensor (3), SOEC (3), Slurry (2), etc. | 112 | |
|---|
| SP-SZ | Supercritical Fluid Deposition (5), Startup (5), Surfactant (4), Suspension (3), Spray drying (3), super-critical carbon dioxide (2), etc. | 94 | |
|---|
| T | Thermal management (2), transfer learning (2), Temperature-responsive polymer (1), Technoeconomics (1), Taylor vortex flow (1), template effect (1), etc. | 58 | |
|---|
| U | ultrasound (3), ultrafiltration membrane (1), Ultrafine bubbles (1), University (1), Unsaturated polyester resin (1), UVGI (1), etc. | 15 | |
|---|
| V | viscosity (5), vesicle (3), Viscoelastic Fluid (2), Value chain (1), Valve (1), VHH (1), etc. | 27 | |
|---|
| W | water electrolysis (10), water treatment (7), woody biomass (3), Waste utilization (2), Water plasma (1), Waste water treatment (1), etc. | 45 | |
|---|
| X | X-Ray CT (1) | 1 | |
|---|
| Y | Yttrium doping (1), Yield stress (1), Yarrowia lipolytica (1), yielding behavior (1) | 4 | |
|---|
| Z | zeolite (12), zif-8 (2), Zn-air battery (1), zwitterionic polymer (1), ZnO formation (1), Zero Liquid Discharge (1), etc. | 21 | |
|---|
