A Theoretical Model of the Gasification Rate of Biomass and Its Experimental Confirmation

Savelii Kukharets (), Gennadii Golub, Marek Wrobel, Olena Sukmaniuk, Krzysztof Mudryk, Taras Hutsol (), Algirdas Jasinskas, Marcin Jewiarz, Jonas Cesna and Iryna Horetska
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Savelii Kukharets: Department of Mechanics and Agroecosystems Engineering, Polissia National University, Staryi Blvd., 7, 10008 Zhytomyr, Ukraine
Gennadii Golub: Department of Tractors, Automobiles and Bioenergy Resources, National University of Life and Environmental Sciences of Ukraine, Heroev Oborony Str., 15B, 03040 Kyiv, Ukraine
Marek Wrobel: Faculty of Production and Power Engineering, University of Agriculture in Krakow, 30-149 Krakow, Poland
Olena Sukmaniuk: Department Machines Processes and Agroengineering Equipment, Polissia National University, Staryi Blvd., 7, 10008 Zhytomyr, Ukraine
Krzysztof Mudryk: Faculty of Production and Power Engineering, University of Agriculture in Krakow, 30-149 Krakow, Poland
Taras Hutsol: Department of Mechanics and Agroecosystems Engineering, Polissia National University, Staryi Blvd., 7, 10008 Zhytomyr, Ukraine
Algirdas Jasinskas: Department of Agricultural Engineering and Safety, Faculty of Engineering, Vytautas Magnus University, Agriculture Academy, Studentu Str., 15A, Akademija, LT-53362 Kaunas, Lithuania
Marcin Jewiarz: Faculty of Production and Power Engineering, University of Agriculture in Krakow, 30-149 Krakow, Poland
Jonas Cesna: Department of Mechanical, Energy and Biotechnology Engineering, Vytautas Magnus University, Agriculture Academy, Studentu Str., 11, Akademija, LT-53362 Kaunas, Lithuania
Iryna Horetska: Department of Mechanics and Agroecosystems Engineering, Polissia National University, Staryi Blvd., 7, 10008 Zhytomyr, Ukraine

Energies, 2022, vol. 15, issue 20, 1-15

Abstract: The gasification rate of fuel, biomass gasification in particular, is an important parameter which is worth considering in the process of creating a gasifier with a continuous operation process. The gasification of biomass is a complex thermochemical process. The theoretical and practical studies of the gasification rate of biomass are complicated because of a high thermochemical rate of reactions in the functioning zones of a gasifier. The complexity of the study prevents the achievement of the required accuracy of the analytical model of the gasification rate of biomass. The known theoretical models of the gasification rate only partially describe the dynamics of the gasification rate of biomass. Moreover, most scientific studies are focused on establishing the effects of gasifier parameters and the gasification process on the quality indicators of the received gas but not on the gasification rate of fuel. To build an accurate model of the gasification rate the authors propose a series of experimental studies in a well-defined range of the parameters of a gasifier. The paper suggests a simple mathematical model of the gasification rate of biomass, which is proportional to the amount of plant biomass that remained non-gasified. The coefficients of the gasification rate for straw pellets, wood pellets and wood in pieces have been determined. Under a minimal air supply into an active zone of a gasifier (0.00088 m 3 /s) a coefficient of gasification rate is nearly the same for the test fuel materials and it differs by 4.7% between wood pellets and straw pellets. When the air supply increases, the gap between the coefficients increases as well and it reaches 9.44 × 10 −5 c −1 for wood pellets, 1.05 × 10 −4 c −1 for straw pellets and 8.64 × 10 −5 c −1 for wood in pieces under air supply into an active zone of a gas generator of 0.01169 m 3 /s. Straw pellets have the highest gasification rate and wood in pieces has the lowest gasification rate.

Keywords: straw; wood; biomass; pellets; coefficient; gasification; rate; mathematical model (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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