Pre-charged bladder & diaphragm expansion tanks are commonly referred to as an Air Elimination System, see what types are available and how to install them.
Expansion and Compression Tanks in Hydronic Systems (Part 4): Acceptance Volume, by R. L. Deppmann
Hydronic HVAC Systems: Air Elimination vs. Air Control
CA Series Expansion Tanks
Amtrol No. 30 Expansion Tank for Hydronic/Boiler EX-30 - The Home Depot
Replacing old (bladderless) expansion tank - Community Forums
What is an Air Separator?
Expansion and Compression Tanks in Hydronic Systems (Part 4): Acceptance Volume, by R. L. Deppmann
Air Removal from Hydronic Systems
Expansion Tanks
Tangential Air Separators
Expansion & Compression Tanks in Hydronic Systems: Air Elimination System
Expansion Tank Sizing in Hydronic Systems: Air Elimination Systems
Hydronics 102 System Components - Document - Gale Academic OneFile