Inert ceramic support balls can often be reused during catalyst changeout if each graded layer remains mechanically sound, chemically stable, clean and correctly sized. Keep layers separated during unloading and base reuse on inspection rather than age alone.

Broken ceramic support balls create smaller fragments that reduce void space, increase pressure drop, allow bed settlement and promote catalyst migration. Investigate the cause before simply replacing damaged media.

Catalyst particles can migrate into ceramic support layers when the void structure is too coarse or catalyst fragments during service. Properly graded transition layers reduce penetration without creating excessive pressure drop.

Support-ball diameter and layer depth influence reactor pressure drop. Larger balls preserve open flow area, while smaller transition balls retain catalyst particles. Grading balances hydraulic capacity with particle support.

Higher-alumina ceramic balls provide benefits in demanding temperature, wear, strength or purity service, but conventional inert ceramic grades remain appropriate for many catalyst beds. Select alumina content from process requirements rather than automatically choosing the highest percentage.