Одређивање продуката сагоревања брикета биомаса

Abstract

The combustion of biomass as a renewable energy source can significantly impact the environment, depending on the type of biomass, its physico-chemical properties, and combustion conditions. This study investigates the combustion products (CO, CO₂, SO₂, NO, and NOx) of briquettes made from various biomass types: tobacco and soybean stalks, wheat straw, sunflower head residues, maize cobs, and beech wood sawdust. The analysis was conducted in a 65 kW thermal power boiler according to instruction UP.53.540.01 and the SRPS M.E2.203:1980 standard. All biomass samples were combusted under identical conditions including furnace temperature, water temperature in the boiler, and water mass flow rate. Flue gases were analyzed using the MRU GmbH User Manual Vario Plus gas analyzer (MRU, Germany). The results showed that the lowest O₂ content was observed during the combustion of sunflower head residues (11.70%), while the highest was recorded in tobacco stalks (12.88%). The lowest CO₂ content was measured in maize cob briquettes (7.90%), and the highest in sunflower head residues (9.57%). CO concentrations ranged from 1590.34 mg/m³ (tobacco stalks) to 2952.3 mg/m³ (corn cobs). The highest NO concentration (273.67 mg/m³) was recorded in tobacco stalks and sunflower head residues, while the lowest was found in beech wood sawdust (142.34 mg/m³). For NOx, the highest value was also recorded in tobacco stalks (419.67 mg/m³), and the lowest in beech sawdust (213.34 mg/m³). The data obtained for combustion products in this study indicate that tobacco stalks, and other tested biomass samples, fall within the emission limits prescribed by environmental regulations, confirming their environmental suitability for use as biofuel