Sequential Extraction of Coal Tar Pitch and Structural Characterization of Enriched Large Polycyclic Aromatic Hydrocarbons

2019 ◽  
Vol 4 (17) ◽  
pp. 4874-4882
Author(s):  
Xiao‐Hua Fan ◽  
Wei Li ◽  
Lei Chen ◽  
Ting Ouyang ◽  
Youqing Fei
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Sequential Extraction ◽  
Structural Characterization ◽  
Aromatic Hydrocarbons ◽  
Coal Tar ◽  
Coal Tar Pitch ◽  
Polycyclic Aromatic ◽  
Large Polycyclic Aromatic Hydrocarbons

Modification of Coal Tar Pitch to Reduce the Carcinogenic Polycyclic Aromatic Hydrocarbons

2013 ◽  
Vol 295-298 ◽  
pp. 3098-3103 ◽  
Author(s):  
De Min He ◽  
Jun Guan ◽  
Di Wu ◽  
Shu Chang Zhao ◽  
Qiu Min Zhang
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Reaction Time ◽  
Epoxy Resin ◽  
Aromatic Hydrocarbons ◽  
Coal Tar ◽  
Coal Tar Pitch ◽  
Temperature Reaction ◽  
Polycyclic Aromatic ◽  
Soft Point

This research investigated on reducing carcinogenic polycyclic aromatic hydrocarbons(PAHs),especially benzo[a]pyrene (BaP) in coal tar pitch by modifying with the two selected modifiers: Paraformaldehyde and Epoxy Resin. The reaction emphasis on the change of temperature, reaction time and the quantity of the modifiers. The results indicated that Paraformaldehyde and Epoxy Resin could decrease the PAHs content greatly. The BaP decreasing rate reached 75.86% and 53.45% respectively. And the BaP equivalency content of the pitch decreased from 2.94% to 1.41% and 1.47% respectively. The properties of the modified coal tar pitch, including soft point (SP), toluene insolubles (TI), quinoline insolubles (QI) have changed a lot.

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