Methane rich gasification of wood pellets

Abstract

Abstract. In the work there are shown the results of experimental studies on methane rich gasification of pinewood pellets in Bio-CONOx technology. The experiment was carried out on a laboratory scale gasifier (5 kW), which design features allow producing a high quality gas with a high methane content. In the results there was identified the impact of the quantity of Bio-CONOx on the amount of flammable gas compounds (methane, hydrogen and carbon monoxide) in the synthesis gas and the gas calorific value. The additive was added in 10,20,30 and 50% concentrations to the gasifier chamber. It has been shown that increasing the amount of the additive has a positive effect on the calorific value of the synthesis gas ( Fig.1,2). Gas with a high content of methane (and high calorific value) was obtained from gasification of biomass with a 50% addition of Bio-CONOx. There was also examined the proportion of blowing air (gasifying medium) for which the properties of obtained syngas were the best.

Effect of Woody Biomass Gasification Process Conditions on the Composition of the Producer Gas

“…As can be seen, CO is the main combustible gas in all cases, with concentrations ranging from 9-35 vol%. This study's CO concentrations are comparable and within the same range as those derived from other studies [30][31][32]34,[36][37][38]]. In the above-mentioned studies, the concentration of H 2 ranged from 2-35 vol% compared to a concentration from 4.0 to 4.3 vol% obtained in the producer gas from the gasification of the currently studied WB, which was similar to the results of Joka et al, Inayat et al, and Poskrobo et al [31][32][33].…”

“…This study's CO concentrations are comparable and within the same range as those derived from other studies [30][31][32]34,[36][37][38]]. In the above-mentioned studies, the concentration of H 2 ranged from 2-35 vol% compared to a concentration from 4.0 to 4.3 vol% obtained in the producer gas from the gasification of the currently studied WB, which was similar to the results of Joka et al, Inayat et al, and Poskrobo et al [31][32][33]. However, some studies of WB gasification in fixed-bed reactors by Brynda et al and Bhatia et al [34,37] also demonstrated higher concentrations of H 2 (16-25 vol%).…”

“…Likewise, a study on the gasification of empty fruit bunches by Lau Sze Yii et al [42] showed an overall higher volume percentage of H2, CO, and CO2 at 900 °C compared to those at 700 and 800 °C. The effect of temperature was similar also for household waste studied by Zeng et al [43], where H2, Estonian WB Pine sawdust [33] Pine pellets [32] Pine pellets [33] WB [31] Rice husks [35] WB [30] Woodchips [34] Average…”

“…The results obtained at 950 • C showed the highest concentration of combustible gases (H 2 , CO, and CH 4 ). These were compared to other studies on the gasification of wood chips and other biomass in air atmospheres at temperatures ranging from 700 to 1100 • C. These studies used WB [30,31], pine pellets [32,33], pine sawdust [33], woodchips [34], and rice husks [35] as feedstock. A comparison of the average gas composition for each study is shown in Figure 4.…”