| First letter | Keywords | Number |
|---|
| 0-9 | 3D printing (2), 3D bioprinting (2), 2,2'-bipyridine (1), 3D Convolutional Neural Network (3D CNN) (1), 13C labeling (1), 3DIC (1) etc. | 11 |  |
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| A | Adsorption (10), active matter (4), Air separation (3), Ammonia Cracking (3), Amine (3), absorption (3) etc. | 162 | |
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| B | Biomass (6), Biopharmaceuticals (2), Biodegradable polymer (2), Bioethanol (2), Bubble rise motion (2), Blockage (1) etc. | 92 | |
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| C-CH | Catalyst (11), Carbon dioxide (8), CFD (8), carbon nanotube (4), CCU (3), Chemical Recycling (3) etc. | 154 | |
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| CI-CZ | Crystallization (11), CO2 capture (11), CO2 electrolysis (6), coating (3), CO2 Absorption (3), CO2 (3) etc. | 185 | |
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| D | Deep eutectic solvent (12), direct air capture (8), drying (6), Drop-in fuel (5), degradation (4), Distillation (3) etc. | 153 | |
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| E | Emulsion (8), Extraction (7), electrodialysis (4), Electrocatalyst (4), Electrolysis (4), Encapsulation (3) etc. | 134 | |
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| F | fuel cell (5), Fluidized bed (4), Flame spray pyrolysis (4), Fine Bubble (4), Fischer-Tropsch synthesis (3), Freezing (3) etc. | 121 | |
|---|
| G | Gold (4), Gold nanoparticles (4), Gasification (4), Gas separation (3), gold nanoparticle (3), Gel (3) etc. | 84 | |
|---|
| H | hydrogen production (16), hydrogen (8), hydrogel (7), HSP (3), Hydrogen evolution reaction (3), Hydrolysis (3) etc. | 143 | |
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| I | Interfacial polymerization (10), Ionic Liquid (6), Interface (4), Image analysis (2), in-situ observation (2), Iron (2) etc. | 95 | |
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| J | Janus particle (2), jam (1), Japanese Traditional Company (1) | 4 | |
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| K | Kinetics (2), kinetic model (1), K promotion (1), Kinetic Analysis (1), Komagataella phaffii (1), Kinetic analysis of hydrodefluorination (1) etc. | 7 | |
|---|
| L | liposome (4), lithium-ion battery (4), liquid-liquid phase separation (3), lipid assembly (3), LLM (3), liquid crystal (3) etc. | 98 | |
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| M-MH | Machine learning (31), metal-organic frameworks (15), methanation (8), membrane (7), Metal-organic framework (6), membrane separation (4) etc. | 165 | |
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| MI-MZ | mixing (9), MOF (5), molecular dynamics (4), Microwave (4), Microwave heating (3), Microcapsule (3) etc. | 114 | |
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| N | Numerical simulation (5), nanoparticles (4), Ni catalyst (3), Nickel (3), nanoparticle (3), nanofiber (3) etc. | 83 | |
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| O | organic solvent reverse osmosis (5), Organic solvent nanofiltration (5), Oxygen evolution reaction (2), Oxygen Reduction Reaction (2), Oxidation (2), Organosilica membrane (2) etc. | 64 | |
|---|
| P-PH | Peptide (8), Photocatalyst (7), PFAS (7), pervaporation (4), Phase equilibria (3), Phase Change Material (3) etc. | 118 | |
|---|
| PI-PZ | Process simulation (6), Plant oil deoxygenation (5), Polyamide membrane (5), pyrolysis (4), Polymer electrolyte fuel cell (4), protein (4) etc. | 183 | |
|---|
| Q | quartz crystal microbalance (2), QCM (2), quality (1), Quincke Roller (1), Quantitative Evaluation (1), Quality management (1) etc. | 9 | |
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| R | Recycling (4), rheology (3), Renewable energy (2), rare earth (2), Reverse osmosis (2), Redox (2) etc. | 72 | |
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| S-SO | Simulation (7), self-assembly (6), silica (4), Separation (4), solid catalyst (3), solid oxide fuel cell (3) etc. | 135 | |
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| SP-SZ | Surfactant (7), Startup (6), supercritical water (4), Supercritical carbon dioxide (4), Surface modification (4), Structured catalyst (4) etc. | 132 | |
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| T | Transdermal delivery (3), Thermal conductivity (3), Transfer learning (3), Taylor-Couette flow (3), Temperature-responsive polymer (2), Titanium oxide (2) etc. | 76 | |
|---|
| U | Upcycling (5), Ultrafine Bubble (4), UiO-66 (2), Ultrasound (2), UV Irradiation (1), ultrasound wave (1) etc. | 29 | |
|---|
| V | viscosity (6), Viscoelastic fluid (4), Value Chain (2), Vapor-liquid equilibria (2), Viscoelasticity (2), Value delivery (1) etc. | 36 | |
|---|
| W | Woody biomass (8), Water electrolysis (4), Waste plastics (3), Water Treatment (2), Water electrolyzer (2), Waste tire (1) etc. | 43 | |
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| X | X-type zeolite membrane (1), XPS analysis (1), X-ray CT (1) | 3 | |
|---|
| Y | YSZ (1), Yeast promoter engineering (1) | 2 | |
|---|
| Z | Zeolite (10), zwitterionic polymer (2), Zwitterion (1), Zinc (1), zeolite membrane (1), Zinc concentrates (1) etc. | 31 | |
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