期刊
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
卷 151, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jaap.2020.104927
关键词
Coal; Pyrolysis; Hematite; Tar
资金
- National Natural Science Foundation of China [51922052, 51778309, U1706222, 51704016]
- Natural Science Foundation of Shandong Province [ZR2018JL018]
- Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Land and Resources [KF2019-6]
- Qingdao Postdoctoral Research Project [A2020-003]
- Shandong Provincial Postdoctoral Application Research Project [202003113]
In this paper, to investigate the catalytic pyrolysis behavior of coal (XJ) volatiles over two hematite (HA and HB), a double-layered fixed-bed reaction apparatus, which was easy to separate coal and catalysts was employed to measure the pyrolysis tar yield, and the composition of pyrolysis tar and gas was investigated by GC-MS and GC. The results indicated that both hematite A and hematite B reduced the tar yield and caused an increase in CH4, CO2 and H-2 output. Analysis of the chemical composition of tar indicated that XJ had a high content of pitch (46.39 %). At the same time, the addition of HA and HB decreased the pitch content by 7.59 and 8.88 %, respectively. Then, the change in the hematite chemical composition and physical structure after catalytic pyrolysis was characterized by XRD, TEM, XPS, SEM and N-2 adsorption-desorption. Furthermore, a catalytic mechanism was proposed to illustrate the transformation of pyrolysis tar over hematite. Fe atoms and lattice oxygen are the decisive factors in the bond cleavage of pyrolysis tar. Fe atoms can break the C-C and C-H bonds of aliphatic hydrocarbons, while lattice oxygen can promote C-O bond cleavage and produce CO2.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据