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The ignitability fuel ratio and ash fusion temperatures of torrefied woody biomass

机译：烘焙木质生物质的可燃性燃料比和灰分熔融温度

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摘要

The impact of torrefaction temperature on the ignitability, fuel ratio and ash fusion temperatures of two tropical deciduous woods (Teak and Melina) were investigated in a setup of tubular furnace. The properties considered are calorific value, fuel ratio, ignitability index, ash compositions and ash fusion temperatures of the biomass. Six different temperatures (220, 240, 260, 280, 300 and 320 °C) at 60 min reaction time were considered. The results indicated that as torrefaction temperature increased, the calorific value, fuel ratio and ignitability index of the biomass also increased. The ignitability index of biomass (40–63) was better than the value (35) recommended for fuel applicable in thermal plants for power generation. The ash compositional analysis revealed that there was no variation in the quantity of SiO , Al O , CaO along with other minerals for the raw and torrefied biomass. This implied that the temperature up to 320 °C has no significant impact on the compositions of biomass ash during torrefaction. The ash fusion temperature test showed that the biomass ash softens at 1200 °C and finally fused at 1300 °C. The study concluded that an increase in torrefaction temperature increases the thermal properties of the torrefied biomass without affecting the compositions of biomass ash or lowering the ash fusion temperatures.
机译：在管式炉中研究了焙干温度对两种热带落叶木材（柚木和梅利纳）的可燃性，燃料比和灰分熔融温度的影响。考虑的性质是生物质的热值，燃料比，可燃性指数，灰分组成和灰分熔融温度。考虑了60分钟反应时间时的六个不同温度（220、240、260、280、300和320°C）。结果表明，随着焙烧温度的升高，生物质的热值，燃料比和可燃性指数也随之升高。生物质的可燃性指数（40-63）优于推荐用于火力发电厂的燃料的推荐值（35）。灰分组成分析表明，生的和焙烧的生物质的SiO，Al O，CaO以及其他矿物质的含量没有变化。这意味着在烘烤过程中，高达320°C的温度对生物质灰分的组成没有明显影响。灰熔融温度测试表明，生物质灰在1200°C时软化并最终在1300°C时熔融。研究得出的结论是，焙烧温度的升高会提高焙烤过的生物质的热性能，而不会影响生物质灰分的组成或降低灰分熔融温度。

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