| First letter | Keywords | Number |
|---|
| 0-9 | 25th anniversary (2), 3DIC (1), 1,3-PDO (1), 5-(hydroxymethyl)furfural (1), 2D Ising model (1), 13C-Metabolic flux analysis (1) etc. | 9 |  |
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| A | Adsorption (14), Activated carbon (4), ALD (4), Antibody (4), Absorption (4), Atomic Layer Deposition (4) etc. | 195 | |
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| B | biomass (6), bubble dynamics (4), biomanufacturing (3), Biological system (2), biogas (2), Biomaterial (2) etc. | 108 | |
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| C-CH | CFD (8), Carbon neutral (7), CCU (6), catalyst (6), carbon nanotube (6), Carbon dioxide (5) etc. | 171 | |
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| CI-CZ | CO2 (10), Crystallization (10), CO2 separation (5), CO2 capture (5), CO2 electroreduction (3), CVD (3) etc. | 181 | |
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| D | deep eutectic solvent (9), Drying (4), Dry reforming (3), Discrete Element Method (3), deep eutectic solvents (3), dispersion (3) etc. | 145 | |
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| E | electrocatalyst (9), Extraction (8), electrocatalysts (4), Emulsion (4), Enzyme (3), encapsulated MFI zeolite (2) etc. | 117 | |
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| F | fluidized bed (7), Fuel cell (7), Flame spray pyrolysis (4), Fouling (3), freeze drying (3), fluorescence (2) etc. | 98 | |
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| G | Gas separation (4), Gold (3), Green ammonia (3), graft polymerization (3), gas diffusion layer (3), Gas hydrate (2) etc. | 68 | |
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| H | Hydrogen (9), hydrogel (8), Hydrothermal (6), Hydrogen peroxide (5), Hydrothermal treatment (4), hydrothermal synthesis (3) etc. | 138 | |
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| I | ionic liquid (7), Interfacial polymerization (5), Image analysis (3), Immobilized catalyst (2), ionomer (2), inhibitor (2) etc. | 76 | |
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| J | Japanese Company (1), juvenile hormone (1), Janus multifunctional nanofiber (1), Jump test (1) | 4 | |
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| K | kinetic analysis (2), Kinetic TSA separation (1), Korteweg force (1), Kinetic Modeling (1), KMC (1), kappa-carrageenan (1) etc. | 12 | |
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| L | Lithium-ion battery (5), Liposome (4), Liquid-liquid equilibria (3), Liposomes (3), Life cycle assessment (3), LDES (3) etc. | 93 | |
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| M-MH | Machine learning (26), membrane (15), Metal-organic frameworks (7), Methanation (6), membrane separation (6), membrane reactor (4) etc. | 161 | |
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| MI-MZ | mixing (10), Molecular dynamics (9), Microwave (5), microcapsule (3), Molecularly Imprinted Polymer (3), MOF (3) etc. | 127 | |
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| N | nanoparticles (7), numerical simulation (5), Nanoparticle (5), Nucleation (5), Nanofiltration (3), Neural network potential (2) etc. | 80 | |
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| O | Organic solvent nanofiltration (4), Optimization (3), osmotic pressure (3), Oxygen Reduction Reaction (3), Oxygen-enriched air (2), organic material (1) etc. | 54 | |
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| P-PH | PFAS (6), PEFC (6), Peptide (5), Pervaporation (3), Permeability (3), Phase equilibria (2) etc. | 97 | |
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| PI-PZ | polymer electrolyte fuel cell (6), polymer (6), Plasma (4), polyelectrolyte complex (4), precious metals (3), Powder compaction (3) etc. | 173 | |
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| Q | Quantitative Evaluation (1), quantum computer (1), questionnaire survey (1), Quartz Crystal Microbalance (1), quasi-solid (1), QCM (1) etc. | 7 | |
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| R | Rheology (4), recycling (3), Reactive crystallization (3), Risk assessment (3), Residence time distribution (3), Redox (3) etc. | 81 | |
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| S-SO | separation (8), solvent extraction (7), Solubility (5), Silica (5), simulation (4), slurry (3) etc. | 144 | |
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| SP-SZ | Supercritical carbon dioxide (7), Startup (7), Supercritical CO2 (5), supercritical water (4), Surface modification (4), Surface treatment (3) etc. | 101 | |
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| T | transdermal delivery (4), Thermal energy storage (4), Transdermal drug delivery (4), thermal plasma (2), Transdermal (2), titanium dioxide (2) etc. | 79 | |
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| U | ultrasound (3), Upcycling (2), Ultrafiltration (1), Ultrafine bubble (1), Urea (1), ultrasonic irradiation (1) etc. | 22 | |
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| V | vaccine (5), viscosity (4), viscoelasticity (1), VUV (1), Visible-light photocatalyst (1), virus filtration (1) etc. | 30 | |
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| W | Water Treatment (2), Wound healing (2), Wastewater treatment (2), Women's Empowerment (2), wettability (2), Water electrolysis (2) etc. | 36 | |
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| X | xylose (2), XANES/ELNES (1), X-ray CT imaging (1), xylitol (1) | 5 | |
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| Y | Yoshino cypress (1), Yttrium doping (1) | 2 | |
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| Z | zeolite (11), Zwitterionic nanofiltration membrane (1), Zeolites (1), ZSM-5 (1), Zinc (1), ZSM-5 zeolite membrane (1) etc. | 29 | |
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| 非英数字 | * (5), precision medicine (1) | 6 | |
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