Impacts of Organic Structures and Inherent Minerals of Coal on Soot Formation during Pyrolysis

He-Ming Dong, Qian Du, Dun Li, Zhao-Yang Cui, Jian-Min Gao and Shao-Hua Wu
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He-Ming Dong: Institute of Combustion Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China
Qian Du: Institute of Combustion Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China
Dun Li: Institute of Combustion Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China
Zhao-Yang Cui: Institute of Combustion Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China
Jian-Min Gao: Institute of Combustion Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China
Shao-Hua Wu: Institute of Combustion Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China

Energies, 2019, vol. 12, issue 23, 1-16

Abstract: The pyrolysis of four pairs of raw and acid-washed coals under N 2 atmosphere was carried out in a drop tube reactor at 1250 °C. The results show that both organic structures and metal elements have an important influence on the formation of soot. The total area of aromatic and aliphatic hydrogen absorption bands is positively correlated with soot yield. Aromatic compounds have a greater contribution to soot and tar formation. The absorption band area of oxygen structures in coal FTIR spectra is negatively correlated with the soot conversion rate of tar. During pyrolysis, metal substances in coal can catalyze the dehydrogenation and deoxygenation of tar, reduce the content and stability of the aliphatic compound, and catalyze aromatic ring rupturing. More importantly, gasified metals can inhibit the polymerization reaction of aromatic compounds.

Keywords: soot; coal pyrolysis; tar; FTIR (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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