文献类型：期刊文献

英文题名：In-Situ Study of Volatile Potassium Produced on Carbon Matrix and its Contribution to Other Char Particle Gasification

作者：Wang, Xingjun[1]; Chen, Qian[1]; Wei, Bing[1]; Wang, Weicheng[1]; Yu, Guangsuo[1]; Chen, Xueli[1]; Liu, Haifeng[1]; Wang, Fuchen[1]

机构：[1] Shanghai Engineering Research Center of Coal Gasification, Institute of Clean Coal Technology, East China University of Science and Technology, P. O. Box 272, Shanghai, 200237, China

年份：2022

外文期刊名：SSRN

收录：EI(收录号：20220310458)

语种：英文

外文关键词：Carbon - Chemical analysis - Chemical reactors - Gasification - Ion exchange

摘要：To understand the volatilization behavior between potassium and carbon matrix, the experiments were carried out in high temperature stage microscope (HTSM) and fixed-bed reactor. The migration of volatile potassium between particles was analyzed by SEM-EDS, while the chemical fraction of potassium species was determined by AAS, and XPS was used to investigated the elements on the surface of the samples. The results showed that potassium would volatile at 765-770°C, C/K≈6.2-9.5(wt%), which would be adsorbed by the other char particles, leading to an increasing of the content of soluble potassium and ion-exchanged potassium, promoting carbon conversion in a limited effect, resulting in a decreasing of hydroxyl functional groups on the char particles. Meanwhile, the potassium content was proportional to the migration distance, the migration distance was about 720-800 μm at maximum under HTSM. ? 2022, The Authors. All rights reserved.