Combustion characteristics of multi-component cedar bio-oil/kerosene droplet
Combustion characteristics of multi-component cedar bio-oil/kerosene droplet
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DOI：
10.1016/j.energy.2016.07.097
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发表时间：
2016-10
期刊：
影响因子：
9
通讯作者：
M. S. Wu;S. I. Yang
中科院分区：
文献类型：
--
作者：
M. S. Wu;S. I. Yang
本文研究了多组分生物液滴的化学动力学和燃烧特性。具体而言，采用火花点火煤油/水相生物油和煤油/油相生物油液滴的燃烧特性，通过使用热重分析和气相色谱-质谱。实验组分别将煤油与5wt%或10wt%的水相或油相生物油混合，采用相同的能量点燃液滴，观察其燃烧行为和燃烧速率。实验结果表明，KER组（纯煤油）的液滴直径根据d2定律减小，而KBO 05组（5wt%油相生物油/95wt%煤油）的液滴直径变化不一致。此外，KBO 10组（10重量%油相生物油/90重量%煤油）的液滴直径变化剧烈，在燃烧过程中表现出显着的膨胀，收缩和膨化行为。TGA结果表明，燃料物质的主要质量损失发生在快速蒸发过程中。应用生物油作为添加剂有助于产生可轻微分解的物质，从而诱导聚合反应并形成残留物。残渣的含量随着生物油中重质馏分量的增加而增加。因此，在燃烧阶段的活化能增加。
The present study examined the chemical kinetic and combustion characteristics of multicomponent bio-droplets. Specifically, spark ignition was employed to examine the combustion characteristics of kerosene/aqueous phase bio-oil and kerosene/oily phase bio-oil droplets by using thermogravimetric analysis and gas chromatography-mass spectrometry. The experimental groups involved mixing kerosene with 5 wt% or 10 wt% of aqueous-phase or oily-phase bio-oil, and the same amount of energy was adopted to ignite the droplets and observe their combustion behaviors and combustion rates. The experimental results showed that the droplet diameter of the KER group (pure kerosene) decreased according to the d2-law, whereas that of the KBO05 group (5 wt% oily-phase bio-oil/95 wt% kerosene) varied inconsistently. In addition, the droplet diameter of the KBO10 group (10 wt% oily-phase bio-oil/90 wt% kerosene) changed drastically, exhibiting notable expansion, shrinkage, and puffing behaviors during the combustion process. The TGA results revealed that the primary mass loss in the fuel substances occurred during the rapid evaporation. Applying the bio-oil as an additive facilitated generating substances that were slightly decomposable, thus inducing polymerization reactions and forming residues. The content of the residues increased with increasing amount of heavy fractions in the bio-oil. Consequently, the activation energy during the combustion stage increased.