The Type dimension of Hydrocarbon-based Biodiesel segmentation distinguishes three primary sub‑categories: alkyl‑ester biodiesel, hydrotreated renewable diesel (HRD), and hydrogenated vegetable oil (HVO). Alkyl‑ester biodiesel, produced via transesterification of hydrocarbon feedstocks, retains the conventional ester chemistry but offers improved oxidative stability. HRD, generated through catalytic hydro‑processing, eliminates oxygenates, yielding a product chemically analogous to conventional petroleum diesel, which facilitates higher blend ratios without engine modifications. HVO, derived from hydrogenation of vegetable oils or animal fats, creates fully saturated hydrocarbon chains, delivering the highest cetane numbers and cold‑flow performance among the three. Each type contributes distinctively to market size: alkyl‑ester biodiesel dominates volume due to established supply chains; HRD captures premium pricing linked to low‑emission credentials; HVO, though smaller in volume, drives growth in regions with stringent emission standards. Collectively, these sub‑types shape the overall Hydrocarbon-based Biodiesel market, reflecting divergent cost structures, regulatory incentives, and end‑user preferences.