摘要
电石渣是生产乙炔过程中伴生的工业固体废弃物,大量堆积污染环境。在碳中和背景下,为资源化利用固体废弃物,以电石渣为骨架材料,NaNO_(3)为相变材料,采用冷压缩-热烧结法制备电石渣基复合相变储热材料。采用X射线衍射法(XRD)、热重‑差示扫描量热法(TG‑DSC)和激光导热分析法(LFA)对该材料进行了表征和分析。结果表明,该复合材料具备良好的化学相容性,NaNO_(3)和电石渣质量比为5∶5时,各种热物理性能最好,为最佳比例。该比例下复合材料的导热系数最大为0.18 W/(m∙K),50~500℃内的储热密度为457.2 J/g,具备良好的储热性能。
Calcium carbide slag is an industrial solid waste associated with the production of acetylene,and a large number of accumulations pollute the environment. Under the background of carbon neutralization,calcium carbide slag-based composite phase change heat storage material was prepared by cold compression-hot sintering method with calcium carbide slag as skeleton material and NaNO_(3)as phase change material for resource utilization of solid waste. The material was characterized by X-ray diffraction(XRD),thermogravimetry-differential scanning calorimetry(TG-DSC)and laser thermal conductivity analysis(LFA).The results showed that the composite had good chemical compatibility.When the mass ratio of NaNO_(3)to carbide slag was 5∶5,various thermophysical properties were the best,which was the best ratio.Under this ratio,the maximum thermal conductivity of the composite was 0.18 W/(m∙K),and the thermal storage density was 457.2 J/g at50~500 ℃,which showed good thermal storage performance.
作者
熊亚选
王辉祥
胡子亮
药晨华
宋超宇
丁玉龙
XIONG Yaxuan;WANG Huixiang;HU Ziliang;YAO Chenhua;SONG Chaoyu;DING Yulong(Key Lab of HVAC,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Birmingham Centerfor Energy storage,University of Birmingham,Birmingham B152TT,UK)
出处
《综合智慧能源》
CAS
2022年第4期71-75,共5页
Integrated Intelligent Energy
基金
北京市教委科研项目(KM201910016011)。
关键词
固体废弃物
电石渣
骨架材料
相变材料
热能储存
冷压缩-热烧结法
碳中和
solid waste
calcium carbide slag
framework material
phase change materials
thermal energy storage
cold compression-hot sintering method
carbon neutrality
