Distribution of Metallic Elements in Four Group Components of High-Temperature Coal Tar Pitch

Weijie Cheng; Shaoqing Guo; Zhengxuan Sun; Xian-Xian Wei; Libing Gao; Yanzhi Cao

doi:10.1021/acsomega.2c06981

Distribution of Metallic Elements in Four Group Components of High-Temperature Coal Tar Pitch

ACS Omega. 2023 May 1;8(19):16612-16619. doi: 10.1021/acsomega.2c06981. eCollection 2023 May 16.

Authors

Weijie Cheng¹, Shaoqing Guo¹, Zhengxuan Sun¹, Xian-Xian Wei¹, Libing Gao¹, Yanzhi Cao¹

Affiliation

¹ School of Environment and Resources, Taiyuan University of Science and Technology, Taiyuan, Shanxi 030024, P. R. China.

Abstract

The metallic elements in high-temperature coal tar pitch (HCTP) will affect the properties of carbon materials produced from the HCTP. The study on the metallic elements in HCTP is essential for the quality improvement of its derived carbon materials. In this paper, the content of 15 metallic elements in HCTP and its four group components, including n-heptane-soluble substance (HS), n-heptane-insoluble-toluene-soluble substance (HI-TS), toluene-insoluble-quinoline-soluble substance (TI-QS), and quinoline-insoluble substance (QI), was determined. The results show that the content of Na, Ca, Fe, Mg, Zn, K, Pb, and Al is more than 100 ppm and is much higher than that of other metallic elements. The content of Ni, V, Cr, Mo, Sb, Cu, and Mn ranges from 0 to 50 ppm. By mass calculation of the contents of four group components in HCTP, it can be concluded that Na and Fe are randomly distributed in the group components. Al, Zn, Pb, V, and Mn are mainly distributed in the inorganic form in the QI component. Ca, Mg, K, Ni, Cr, Mo, Sb, and Cu are mainly distributed in the small molecular group components such as HS and HI-TS.