The paper presents ways to reduce the carbon footprint through the reuse of microalgae biomass as biofuels (related to bio-CCU). The processing of microalgae biomass into biochar has applications in carbon sequestration, as a feedstock for thermal energy production, as well as activated carbon and adsorption of toxic compounds from polluted air, water and soil. That’s why presents the results of complex thermogravimetric and differential thermal analyzes of the heat-generating capacity of the biofuel from chlorophyll-synthesizing microalgae Chlorella vulgaris, obtained as a result of the sorption of greenhouse gases formed during the burning of solid, liquid, or gaseous fuels. Combustion of samples of biofuel obtained from microalgae, which absorbed, in addition to carbon dioxide, sulfur dioxide and nitrogen oxides, which is present in gas emissions, is accompanied by more significant exothermic effects. According to the results of thermal studies, it was established that the heat-generating capacity of such biofuel exceeds the heat-generating capacity of aspen (Populus tremula), which is an alternative source of energy in the territory of Ukraine, and is close to the heat-generating capacity of the selectively bred energetic willow (Salix Viminalis).
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