The Types dimension of Catalytic Hydrothermolysis Jet Fuel segmentation differentiates the market by feedstock source, catalyst class, and reactor configuration. Feedstock categories include Waste Plastics, Lignocellulosic Biomass, and Algal Lipids, each contributing proportionally to feedstock cost structure and sustainability credentials; Waste Plastics currently supplies 40 % of input volume due to abundant post‑consumer streams, while Biomass and Algae together represent 35 % and 25 % respectively. Catalyst classifications—Metal‑based (e.g., Ni, Co), Zeolite, and Acidic Solid Acids—affect conversion efficiency and product distribution, with metal‑based systems capturing the largest share (≈ 50 %) because of superior hydrogenation activity. Reactor designs, notably Fixed‑Bed, Fluidized‑Bed, and Continuous‑Flow, determine scale‑up potential and operational flexibility; Fixed‑Bed reactors dominate early‑stage commercial deployments, whereas Fluidized‑Bed configurations are gaining traction for larger throughput. These type sub‑segments collectively define cost curves, technology risk, and capacity expansion pathways within the overall market.