Analysis and Characterization of Quinoline Insolubles in Coal Tar
HE Xin1, LIU Dan2, WANG Yonggang1, CHEN Yufei1, ZHANG Haiyong1
1 School of Chemical and Environmental Engineering, China University of Mining & Technology, Beijing 100083; 2 Hydrocarbon High-efficiency Utilization Technology Research Center, Shaanxi Yanchang Petroleum, Xi’an 710075
Abstract: Solid particles in the coal tar have an important effect on pyrolysis and condensation, as well as the microstructure of carbonized products. Due to the influence of raw material, structure of coke oven and coking conditions, there are big differences between the composition, structure, and particle size distribution of solid particles. In order to analyze the influence of these solid particles (often referred to as quinoline insolubles, QI) in coal tar on carbonization process of pitch, elemental analysis, particle size analysis, scanning electron microscopy (SEM) analysis, energy spectrum analysis, X-ray diffraction analysis and thermogravimetric analysis of the solid particles separated from coal tar were conducted, and their influence on the microstructure of coal tar pitch carbonized products was investigated. Results indicated that most of these particles were round, and some of them were aggregated, the yield was 3.44%, 95.29% of them were less than 10 μm. These particles mainly consisted of carbon, and content of carbon was about 98%. There were also some inorganic metallic elements, such as iron, calcium, aluminum, and silicon etc. This might be related to the coking process. The presence of solid particles tends to generate a Mosaic structure of green coke, therefore the preparation of high quality carbon materials needs to effectively remove these particles.
贺欣,刘丹,王永刚,陈宇飞,张海永. 煤焦油中固体颗粒物的分析与表征*[J]. 材料导报编辑部, 2017, 31(22): 142-145.
HE Xin, LIU Dan, WANG Yonggang, CHEN Yufei, ZHANG Haiyong. Analysis and Characterization of Quinoline Insolubles in Coal Tar. Materials Reports, 2017, 31(22): 142-145.
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2017, Vol. 31 
