Effects of organic chlorine on the chemical composition and carbon number distribution of pyrolysis tars

Journal Article · Thu Dec 31 23:00:00 EST 1992 · Combustion and Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(93)90205-H· OSTI ID:6931353

Mulholland, J A; Sarofim, A F; Sosothikul, P; Lafleur, A L ^[1]

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1. Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Chemical Engineering

This paper reports that in order to quantify the effects of chlorine on the composition and distribution of tar products, droplets containing varying amounts of toluene and chlorinated hydrocarbon additives were pyrolyzed in nitrogen. Three chlorinated organics were studied: o-dichlorobenzene, 1,2-dichloroethane, and trichloroethylene. It was found that the pyrolysis of chloro-organics results in the sequestration of hydrogen, leading to a higher propensity for soot formation, a higher degree of ring fusion of the aromatic compounds produced, and little chlorination of arenes at low Cl/H molar ratios. More specifically, little aryl chlorine was found in tars from pyrolysis at high temperatures with Cl/H [lt] 0.3, and most of the aryl chlorine that was detected was bound to unfused benzene rings. Pyrolysis of fuels with higher chlorine content (0.3 [lt] C;/H [lt] 0.6) produced tars containing significant quantities of monochlorinated and dichlorinated aromatics; in these tars, the extent of chlorine substitution decreased as aromatic carbon number increased.

• OSTI ID: 6931353
• Journal Information: Combustion and Flame; (United States), Journal Name: Combustion and Flame; (United States) Vol. 92:1-2; ISSN CBFMAO; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010409* -- Coal
Lignite
& Peat-- Pyrolysis & Carbonization-- (1987-)
010600 -- Coal
Lignite
& Peat-- Properties & Composition
ADDITIVES
ALKYLATED AROMATICS
AROMATICS
CHEMICAL BONDS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHLORINE
CHLORINE COMPOUNDS
COAL TAR
DECOMPOSITION
DISTRIBUTION
DROPLETS
ELEMENTS
HALOGEN COMPOUNDS
HALOGENS
HYDROCARBONS
HYDROCHLORIC ACID
HYDROGEN
HYDROGEN COMPOUNDS
INORGANIC ACIDS
INSTABILITY
NITROGEN
NONMETALS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OTHER ORGANIC COMPOUNDS
PARTICLES
PYROLYSIS
QUANTITY RATIO
SOOT
TAR
THERMOCHEMICAL PROCESSES
TOLUENE