Additive Manufacturing of Al₂O₃-Based Carriers for Heterogeneous Catalysis

Additive manufacturing techniques are known for their impressive possibilities in shaping complex structures, which would be beneficial in the production of alumina-based catalyst shaped bodies. 3D printing of dense ceramics, especially Al₂O₃, is known for various printing systems. However, only little effort was done to produce pure alumina parts with increased BET surface areas and sufficient mechanical strength to be used as catalyst carriers. The applicability of four different printing techniques is evaluated and discussed to determine possibilities, strategies and limitations of each technique.