不同热解温度骨炭孔隙结构的Micro-CT原位三维可视化表征  

In Situ 3D Visualization of Pore Structure Changes of Bone Charat Different Pyrolysis Temperatures by Micro - CT

作　　者：朱瀛 王梦妍 黄圆萍 解茹越 刘贤[1] 韩鲁佳[1] ZHU Ying;WANG Mengyan;HUANG Yuanping;XIE Ruyue;LIU Xian;HAN Lujia(College of Engineering,China Agricultural University,Beijing 100083,China)

机构地区：[1]中国农业大学工学院,北京100083

出　　处：《农业机械学报》2023年第9期407-413,共7页Transactions of the Chinese Society for Agricultural Machinery

基　　金：现代农业(奶牛)产业技术体系建设专项资金项目(CARS-36);教育部“创新团队发展计划”项目(IRT1293)。

摘　　要：骨炭作为不同动物源骨粉资源化利用的一种重要产物,含有丰富的孔隙结构和活性位点,可被用作于催化剂载体或水体、土壤等环境中的吸附剂。为了三维、原位可视化表征不同动物源骨炭颗粒的孔隙结构特征,选择热解温度为400、500、600、700、800℃的猪、牛骨炭颗粒为研究对象。骨炭颗粒Micro-CT扫描条件为:管电压50 kV、管电流200 mA、图像分辨率10μm;Micro-CT图像二值化方法为Adaptive mean-C。结果表明:UM和ACE相结合的Micro-CT图像滤波处理方法最优;不同热解温度骨炭颗粒的断层结构图像和容积模型与电镜结果相近;骨炭颗粒比表面积、孔隙率和孔径分布的定量表征结果与实验室BET法的测定值相吻合。研究结果可为骨炭孔隙结构原位三维分析提供一种非破坏、可视化的表征新手段。Bone char,as an important product for the resource utilization of bone meal of different animal sources,contains rich pore structure and active sites that can be used as catalyst carriers or adsorbents in water,soil and other environments.In order to characterize the pore structure of different animal-derived bone char particles in three-dimensional and in situ visualization,porcine and bovine bone char particles with pyrolysis temperatures of 400℃,500℃,600℃,700℃and 800℃were used.The Micro-CT scanning conditions of bone char particles were tube voltage 50 kV,tube current 200 mA,image resolution 10μm;Micro-CT image binarization method was Adaptive mean-C.The results showed that the Micro-CT image filtering method combining UM and ACE was optimal.The optimal parameters of the UM method were Radius value set to 5,Amount value set to 90%,Threshold value set to 0,and ACE using adaptive model.The tomographic structure images and volume model of bone char particles at different pyrolysis temperatures were similar to the electron microscopy results.The quantitative characterization results of specific surface area,porosity and pore size distribution of bone char particles were in good agreement with those determined by laboratory BET method.The results can provide a nondestructive and visualized means for in situ 3D analysis of bone char pore structure.

关 键 词：骨炭孔隙结构 原位三维可视化 MICRO-CT 图像处理 

分 类 号：S24[农业科学—农业电气化与自动化]