State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, PR China.
State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, PR China.
Bioresour Technol. 2021 Jan;320(Pt B):124375. doi: 10.1016/j.biortech.2020.124375. Epub 2020 Nov 7.
The combustion behaviours of three components, namely hemicellulose, cellulose, and lignin, and four types of biomass, namely rice straw, bamboo, peanut shell, and chestnut shell, were examined in a drop tube furnace set at 1273 K, in O/N atmospheres containing 21-100% O. Radiant energy analysis technology was employed to infer the temperatures of the samples. The results show that the ignition mechanisms of cellulose and hemicellulose change at 30% and 70% O, respectively, and the lignin particle ignites homogeneously at 20-30% O, heterogeneously at 50% O, and hetero-homogeneously at 70-100% O, respectively. The changes in the ignition mechanisms of biomass particles with lignin content > 10% and < 10% under a certain oxygen concentration depend considerably on the lignin and cellulose contents in the biomass particle, respectively. The expansion of biomass particles with lignin content > 10% and < 10% during combustion process are caused by lignin and hemicellulose, respectively.
在 1273 K 的滴落管式炉中，在含有 21-100%O 的 O/N 气氛中，研究了三种成分（半纤维素、纤维素和木质素）和四种生物质（稻草、竹子、花生壳和板栗壳）的燃烧行为。采用辐射能分析技术推断样品的温度。结果表明，纤维素和半纤维素的点火机制分别在 30%和 70%O 下发生变化，木质素颗粒在 20-30%O 下均匀点火，在 50%O 下异相点火，在 70-100%O 下异相-均匀点火。在一定氧气浓度下，木质素含量大于 10%和小于 10%的生物质颗粒的点火机制变化很大，分别取决于生物质颗粒中的木质素和纤维素含量。木质素含量大于 10%和小于 10%的生物质颗粒在燃烧过程中的膨胀分别是由木质素和半纤维素引起的。
