State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, School of Chemical Engineering and Technology, Xinjiang University, Xinjiang Key Laboratory of Coal Clean Conversion and Chemical Engineering Process
School of Resources and Environmental Engineering, East China University of Science and Technology

针对我国富油粉煤资源未被充分合理利用的问题,设计并搭建了一种高频炉快速热解装置,以新疆富油粉煤为原料,研究了快速热解对初始热解产物生成规律的影响。结果表明:随着热解终温和升温速率的增加,轻质可燃气体产量增加,H2摩尔分数超过45%;焦油产率提高,最高可达到煤样格金焦油产率的125%,但也伴随重质组分增加,导致焦油品质降低;GC/MS分析表明,与慢速热解相比,快速热解下焦油中长链烷烃的质量分数降低至1.33%(主要为十六烷),而多环芳烃类物质的质量分数显著增加至61.26%,焦油组分的相对分子质量和芳香性增加;通过比表面积分析发现,快速热解半焦的孔结构部分坍塌或融合,比表面积和微孔数量减少,降低了对氧气的吸附能力,从而降低了半焦自燃的可能性。

To address the underutilization of oil-rich pulverized coal resources in China, a high-frequency furnace rapid pyrolysis system was designed and built. Using oil-rich pulverized coal from Xinjiang as feedstock, the effects of rapid pyrolysis on the formation patterns of prima- ry pyrolysis products were investigated. The results show that as the final pyrolysis temperature and heating rate increase, the yield of light combustible gases also increase, with H mole frac- tion over 45% of the generated gases. Additionally, the tar yield reaches 125% of the G-K tar yield of the coal sample, however,this is accompanied by an increase in heavy fractions, leading to a decline in tar quality. GC/MS analysis reveal that compared to slow pyrolysis, the mass frac- tion of long-chain alkanes in tar decreases to 1.33% (mainly hexadecane), while the mass frac- tion of polycyclic aromatic hydrocarbons (PAHs) significantly increases to 61.26%, resulting in higher relative molecular weight and aromaticity of tar components. BET analysis show that the pore structures of rapid pyrolysis char partially collapse or fuse, leading to a reduction in specific surface area and micropore quantity. Consequently,this alteration lowers the char’s oxygen ad- sorption capacity and mitigates the risk of spontaneous combustion.

新疆维吾尔自治区自然科学基金重点项目(2023D01D02)和上海市科技创新行动计划课题(21DZ1209003).

黄飞宇,姚宏哲,张维祥,等.新疆富油粉煤快速热解特性研究[J].煤炭转化,2024,47(6):15-25

HUANG Feiyu,YAO Hongzhe,ZHANG Weixiang,et al.Study on rapid pyrolysis characteristics of Xinjiang oil-rich pulverized coal[J].Coal Conversion,2024,47(6):15-25