Within the types dimension, catalyst solutions are classified into homogeneous, heterogeneous, supported, and bi‑functional categories, each shaping the Catalysts for Acrylonitrile Production market in distinct ways. Homogeneous catalysts, typically transition‑metal complexes dissolved in the reaction medium, offer superior activity and selectivity, capturing about 40 % of the market due to their adaptability in large‑scale continuous processes. Heterogeneous catalysts, based on solid‑state metal oxides or phosphates, contribute roughly 30 % as they enable easier separation and recycling, aligning with stricter environmental regulations. Supported catalysts, where active sites are immobilized on carriers such as silica or alumina, hold a 20 % share, balancing activity with operational robustness in high‑temperature polymerization reactors. Finally, bi‑functional catalysts, integrating both acidic and basic sites, account for the remaining 10 % and are gaining traction for their ability to streamline multi‑step reactions, reducing overall process complexity. These type‑based segments collectively define the market taxonomy, influencing investment decisions and R&D focus across the catalyst landscape.