Size-Segregated Particulate Matter from Gasification of Bulgarian Agro-Forest Biomass Residue

The main purpose of the present work was to evaluate efficiency gasification process three different types agro-forest biomass residue (rapeseed, softwood, and sunflower husks) along with characterization size-segregated particulates’ emissions. experiments were carried out in a drop tube furnace (DTF), using two gasifying agents (O2/N2 O2/N2/CO2) at atmospheric pressure constant temperature 1000 °C. In focus effect agent on syngas composition (CO, H2, CH4, CO2), cold gas carbon conversion efficiency, emissions by-products, such as particulate matter (PM), known for having negative environmental health impacts. collected particulates characterized by SEM/EDS XPS analysis. results reveal that: (i) introduction CO2 increased production CO CH4 syngas’ lower heating value (LHV), thus leading higher efficiency; (ii) decreased H2/CO ratio (between 0.25 0.9). Therefore, generated is suitable synthesis hydrocarbons, (iii) lowered char (cyclone) particles but overall PM10–0.3. Submicron size PM dominant fraction (PM1–0.3) O2/N2 (PM1.6–0.3) O2/N2/CO2. Unimodal distribution observed, except husks O2/N2/CO2; (iv) analysis confirmed that submicron-sized PM1–0.3 contain above 80% associated soot, due incomplete oxidation, whereas cyclone (char) particles, about 50%. showed K Cl are typical constituents submicron PM, alkaline earth metals detected mainly fine coarse particulates. Detailed (C1s) spectra most common oxygen-containing groups PM1 surface carbonyl carboxyl.