TY - JOUR
T1 - A study of slow pyrolysis of one low rank coal via pyrolysis-GC/MS
AU - Lievens, C.
AU - Ci, Donghui
AU - Bai, Yu
AU - Ma, Linge
AU - Zhang, Rui
AU - Chen, Jing Yun
AU - Gai, Qingqing
AU - Long, Yinhua
AU - Guo, Xiaofen
PY - 2013/12
Y1 - 2013/12
N2 - This paper describes the study of one low rank coal (LRC). To investigate its molecular structure, a LRC was characterized by proximate and ultimate analyses, XRD, FTIR, Raman spectroscopy, and pyrolysis-GC/MS (py-GC/MS). The light volatile fraction of LRC was characterized via py-GC/MS. LRC's aromatic ring structures consist of 59% amorphous structures, 22% of highly ordered structures with no less than 6 rings, 16% of aromatic structures characterized by aliphatic and/or ether substitutions and 3% of substituted benzene rings. XRD results show that the crystalline unit of LRC contains 1.44 aromatic carbon atoms per aliphatic carbon atom. Aromatic cluster structures within LRC are interconnected via ether- and covalent CC bonds. Hydroxyl, ether and carbonyl functionalities give LRC its polar character. The slow pyrolysis of LRC resulted in a light volatile GC/MS detected fraction consisting of 20% aromatic ring compounds, 45% of phenolics, 30% of aliphatic hydrocarbons and 5% O-compounds, of which the concentration, evolution and nature were dependent on the heating rates and end temperatures. Generally, slow pyrolysis of LRC at 700 C yielded the highest concentrations of unsaturated acyclic hydrocarbons, aromatics and phenolics.
AB - This paper describes the study of one low rank coal (LRC). To investigate its molecular structure, a LRC was characterized by proximate and ultimate analyses, XRD, FTIR, Raman spectroscopy, and pyrolysis-GC/MS (py-GC/MS). The light volatile fraction of LRC was characterized via py-GC/MS. LRC's aromatic ring structures consist of 59% amorphous structures, 22% of highly ordered structures with no less than 6 rings, 16% of aromatic structures characterized by aliphatic and/or ether substitutions and 3% of substituted benzene rings. XRD results show that the crystalline unit of LRC contains 1.44 aromatic carbon atoms per aliphatic carbon atom. Aromatic cluster structures within LRC are interconnected via ether- and covalent CC bonds. Hydroxyl, ether and carbonyl functionalities give LRC its polar character. The slow pyrolysis of LRC resulted in a light volatile GC/MS detected fraction consisting of 20% aromatic ring compounds, 45% of phenolics, 30% of aliphatic hydrocarbons and 5% O-compounds, of which the concentration, evolution and nature were dependent on the heating rates and end temperatures. Generally, slow pyrolysis of LRC at 700 C yielded the highest concentrations of unsaturated acyclic hydrocarbons, aromatics and phenolics.
KW - Coal structure
KW - Coal volatile fraction
KW - Low rank coal
KW - py-GC/MS
KW - ITC-ISI-JOURNAL-ARTICLE
UR - https://ezproxy2.utwente.nl/login?url=https://doi.org/10.1016/j.fuproc.2013.04.026
UR - https://ezproxy2.utwente.nl/login?url=https://library.itc.utwente.nl/login/2013/isi/lievens_stu.pdf
U2 - 10.1016/j.fuproc.2013.04.026
DO - 10.1016/j.fuproc.2013.04.026
M3 - Article
AN - SCOPUS:84878347385
SN - 0378-3820
VL - 116
SP - 85
EP - 93
JO - Fuel processing technology
JF - Fuel processing technology
ER -