| Type | Examples | Key Benefits |
|---|---|---|
| Inorganic Salts | KCl, NH₄Cl | Low cost, easy to use (ideal for shallow coal seams) |
| Cationic Polymers | Polyquaternium | High efficiency, long-lasting performance (suited for deep/complex formations) |
| Amphoteric Polymers | Amphoteric Polyacrylamide | Wide pH adaptability for varied operating conditions |