Details

Autor(en) / Beteiligte

• Zhang, L.-F.
• Liu, G.
• Wang, Y.-G.
• Shen, J.
• Li, R.-F.
• Du, J.-K.
• Yang, Z.-F.
• Xu, Q.-B.

Titel

Modification of coal tar pitch with P-phthalaldehyde to reduce toxic PAH content

Ist Teil von

• Energy sources. Part A, Recovery, utilization, and environmental effects, 2016-01, Vol.38 (5), p.737-743

Ort / Verlag

Taylor & Francis

Erscheinungsjahr

2016

Quelle

Taylor & Francis

Beschreibungen/Notizen

• Coal tar pitch (CTP) was modified with p-phthalaldehyde as a cross-linking agent, p-toluenesulfonic acid as a catalyst, and cyclohexane as solvent, to reduce the toxic PAH content. The optimum reaction conditions were obtained as follows: 8% of p-phthalaldehyde, 5% of p-toluenesulfonic acid, reaction temperature 60°C, and reaction time 4 h. Under the optimum conditions, the reduction rate of the 16 toxic PAHs in CTP achieved 82.75%. The physical properties of modified CTP were improved simultaneously. The detoxification mechanism was investigated via TG-DTG and FT-IR. It was proved that the electrophilic substitution cross-linking reaction took place between PAHs and p-phthalaldehyde, which might significantly contribute to the high reduction rate of the 16 toxic PAHs in CTP.