The Types segment classifies catalysts by their underlying chemistry into Metal‑oxide catalysts, Zeolite‑based catalysts, and Base‑metal (e.g., copper‑based) catalysts. Metal‑oxide formulations, typically vanadia‑titania or tungsten‑based, dominate the market due to their proven durability under high‑temperature, high‑pressure conditions, contributing roughly 50 % of total sales. Zeolite‑based catalysts, prized for their shape‑selectivity and lower sulfur tolerance, capture about 30 % of the market, especially in gas‑fired applications where flue‑gas composition fluctuates. Base‑metal catalysts, offering cost advantages and acceptable performance in low‑temperature regimes, occupy the remaining 20 % and are gaining traction in renewable‑integration setups where capital efficiency is paramount. This market taxonomy illustrates how each catalyst type’s technical attributes—thermal stability, sulfur resistance, and cost structure—directly affect adoption rates and, consequently, the aggregate market valuation.