JUSTIFICATION OF PARAMETERS AND HEATING MODES OF A PYROLYSIS-GASIFICATION UNIT WITH INTEGRATED PROCESSES OF SYNTHESIS GAS CLEANING AND ENRICHMENT

• Datum: 2026
• 1. Verfasser: Omarov , I.
• Format: Artikel
• Sprache: Ukrainisch
• Veröffentlicht: Institute of Renewable Energy National Academy of Sciences of Ukraine 2026
• Schlagworte: pyrolysis-gasification unit; biomass; synthesis gas; cleaning and enrichment zone; electric heating capacity.
• Online Zugang: https://ve.org.ua/index.php/journal/article/view/617
• Назва журналу: Vidnovluvana energetika

The object of the study is the process of thermochemical conversion of lignocellulosic biomass in a combined pyrolysis-gasification unit with integrated zones for reduction, cleaning, and enrichment of syn-gas. The aim of the work is the thermotechnical substantiation of the operating modes of the dry pyrolysis chamber and the reduction zone, taking into account the formation of water vapor and the course of high-temperature heterogeneous reactions. It has been established that during the pyrolysis of 1 kilogram of pellets, approximately 0.269 kg of water vapor is formed, which corresponds to 27% of the mass of the initial feedstock. About 52% of the total amount of water vapor is released within the temperature range of 100–130°C, which determines the maximum thermal load on the reduction zone. The water vapor enters the reaction volume at a temperature close to 100°C and requires additional heat input to be heated to the operating range of 800–1000°C. An assessment of the heat consumption for the water vapor and ensuring the progress of endothermic reactions upon its interaction with carbon has been carried out. The reserve of internal energy of the heated charcoal layer has been determined for an allowable temperature decrease from 1000 to 820°C. The additional power required to compensate for peak thermal loads in the reduction zone has been calculated. It has been shown that a total electric heating power of 6.5 kW ensures the maintenance of a stable temperature regime. The required thickness of the thermal insulation layer made of charcoal has been substantiated. The minimum calculated thickness is 70 mm. In the design implementation, a thickness of 100 mm was adopted, taking into account an operational safety margin. The calculated heating rate of pellets in the dry pyrolysis chamber is 5.08°C/min. Experimental verification demonstrated high agreement between calculated and experimental data; the coefficient of determination is 0.989. The obtained results confirm the feasibility of stable production of syn-gas with increased heating value through the integration of pyrolysis and reduction processes within a unified technological scheme.