AI 中文总结
本研究结合定量同步辐射μCT与三维颗粒分辨模拟，实现生物质热解的高分辨率原位分析，揭示热解过程中质量与体积损失捕捉的不足，为固体燃料燃烧耦合机制研究提供支撑。
AI 中文摘要
理解固体燃料燃烧中输运、化学反应动力学与结构响应的耦合关系，需要高空间分辨率的原位测量。为研究生物质热解动力学，本研究优化同步辐射X射线显微计算机断层扫描（μCT），并开展三维颗粒分辨模拟。采用可控加热与流速的微聚焦加热池，实现最高1240 K的温度，以及3.24 μm空间分辨率、亚分钟级时间分辨率的三维成像。研究考察了三种生物质材料在10-14 K/min样品加热速率下的热解过程，μCT测量捕捉到孔隙变形、开裂、各向异性收缩，同时提供热重与热体积分析以研究特定二次热解路径。考虑详细动力学与结构响应的互补三维模拟重现了观测到的关键趋势，并识别出热解过程中同时捕捉质量与体积损失存在的不足。
英文摘要
Understanding the coupling between transport, chemical kinetics, and structural response within solid fuel combustion requires in situ measurements at high spatial resolution. To examine the dynamics of biomass pyrolysis, we optimize synchrotron X-ray micro-computed tomography ($μ$CT), and conduct 3D particle-resolved simulations. A micro-focused heating cell with controlled heating and flow rate is employed, achieving temperatures of up to 1240 K and 3D imaging at 3.24 $μ$m spatial and sub-minute temporal resolutions. The pyrolysis of three biomass materials at sample heating rates of 10-14 K/min are examined. The $μ$CT measurements capture pore deformation, cracking, anisotropic shrinkage, and provide simultaneous thermogravimetric and thermovolumetric analyses to examine specific secondary pyrolysis pathways. Complementary 3D simulations considering detailed kinetics and structural response reproduce the key trends observed, and identify deficiencies in capturing simultaneous mass and volume losses during pyrolysis.
CommentsSupplementary material included as an ancillary file. Experimental and simulation data available at https://doi.org/10.25740/tf116vx1269
Journal refProc. Combust. Inst. 41 (2026) 106384
DOI：10.1016/j.proci.2026.106384
