STUDY OF THE ELEMENTAL COMPOSITION AND PHYSICOCHEMICAL PROPERTIES OF BIOCHAR OBTAINED FROM COTTON STALK WASTE BY PYROLYSIS

In this study, the authors developed a thermochemical loading method for producing biochar through the pyrolysis of cotton waste, and conducted a physicochemical analysis of the results. The cotton waste was thermally processed at a temperature range of 500÷600 °C to obtain high-carbon, solid heat biochar. Using the PQ-100 “Pipe-in-a-Pipe” type pyrolysis device (Figure 1), high-carbon, porous, multifunctional biochar samples were obtained from the cotton waste, the subject of experimental research (Figure 2). The elemental composition of the biochar samples was analysed using energy-dispersive X-ray spectroscopy (EDS), and the amounts of the available products were determined: carbon (70÷72%), oxygen (11÷15%), hydrogen (3.0÷3.1%), nitrogen (0.8÷1.8%) and nitrogen (0.8÷1.8%). EDS spectrum analysis indicates that the biochar has a high carbon content.