Using vegetal biomass for energy receiving reveals a lot of difficulties connected with biomass inhomogeneity, its high moisture content, low calorific value and low ash melting temperature. One of the variants of receiving stable energy supply, when using biomass, is using gasifier. However, gasifier stable functioning is impossible without the coordination of its design and technological parameters and without investigation of their influence on wood gas quality.

So, the aim of this investigation is to determine gasifier design-technological parameters influence on wood gas output and CO concentration in it.

In this work, an experimental installation is used, consisted of gasifier, gas cooling and purified system, air supply system and gas analyzer. To determine the interconnection between air supply, recovery chamber height and wood gas quantity and Co concentration in it experiments were done. As a raw material, cubic shape wood pieces of hardwood with side measurements from 10 to 40 mm were used.

With the multifactor regressive analysis on equations that describes dependencies were received. Namely wood gas output dependency from recovery chamber height, CO concentration dependency from recovery chamber height, recovery chamber height dependency from an air supply, CO concentration dependency from air supply for different recovery chamber heights.

The results show that for minimal recovery chamber height when the air supply is growing, CO concentration goes down. For maximal recovery chamber, height CO concentration rises more rapidly than for medium chamber height. So recovery chamber height influences wood gas producing greatly.


1. Channiwala S.A., Ratnadhariya J.K. (2009). Three zone equilibrium and kinetic free modelling of biomass gasifier – a novel approach. Renewable Energy, 34 (4), 1050–1058 [in Eng.]. https://doi.org/10.1016/j.renene.2008.08.001
2. Dafiqurrohman H., Surjosatyo A., Gibran F.R. (2016). Air Intake Modification for Pyrolysis Optimization on Rice Husk Fixed Bed Downdraft Gasifier With Maximum Capacity of 30 Kg /Hour. International Journal of Technology, 7 (8), 1352–1361 [in Eng.]. doi:10.14716/ijtech.v7i8.6889.
3. Dejtrakulwong C., Patumsawad S. (2014). Four Zones Modeling of the Downdraft Biomass Gasification Process: Effects of moisture content and air to fuel ratio. 2013 International Conference on Alternative Energy in Developing Countries and Emerging Economies, 52, 142–149 [in Eng.]. doi:10.1016/j.egypro.2014.07.064
4. Golub G.A., Kukharets S.M., Yarosh Y.D., Kukharets V.V. Integrated use of bioenergy conversion technologies in agroecosystems. INMATEH – Agricultural Engineering, 51 (1), 93–100 [in Eng.].
5. Jayathilake R., Rudra S. (2017). Numerical and Experimental Investigation of Equivalence Ratio (ER) and Feedstock Particle Size on Birchwood Gasification. Energies, 10 (8) [in Eng.]. doi:10.3390/en10081232
6. Patra T.K., Sheth P.N. (2015). Biomass gasification models for downdraft gasifier: A state-of-the-art review. Renewable and Sustainable Energy Reviews, 50, 583–593 [in Eng.]. https://doi.org/10.1016/j.rser.2015.05.012
7. Ramos-Carmona S., Perez J F. (2017). Effect of Torrefied Wood Biomass under an Oxidizing Environment in a Downdraft Gasification Process. Bioresources, 12 (3), 6040-6061 [in Eng.]. doi:10.15376/biores.12.3.6040–6061
8. Salem A.M., Paul M.C. (2018). An integrated kinetic model for downdraft gasifier based on a novel approach that optimises the reduction zone of gasifier. Biomass and Bioenergy, 109, 172–181 [in Eng.]. https://doi.org/10.1016/ j.biombioe.2017.12.030
9. Sheth P.N., Babu B.V. Experimental studies on producer gas generation from wood waste in a downdraft biomass gasifier. Bioresource Technology, 100 (12), 3127–3133 [in Eng.]. https://doi.org/10.1016/j.biortech.2009.01.024
10. Susastriawan A.A.P., Saptoad H., Purnomo. Small-scale downdraft gasifiers for biomass gasification: A review. Renewable and Sustainable Energy Reviews, 76, 989–1003 [in Eng.]. https://doi.org/10.1016/j.rser.2017.03.112

Abstract views: 36
PDF Downloads: 35
How to Cite
Yarosh, Y., Golub, G., Kukharets, S., Tsyvenkova, N., Chuba, V., & Shvets, R. (2018). JUSTIFICATION OF RECOVERY CHAMBER HEIGHT AND AIR SUPPLY INFLUENCE ON WOOD GAS OUTPUT AND QUALITY. Vidnovluvana Energetika, (3 (54), 86-96. Retrieved from https://ve.org.ua/index.php/journal/article/view/168