Shock-induced pyrolysis of naphthalene and related polycyclic aromatic hydrocarbons (anthracene, pyrene, and fluoranthene) at pressures of 12–33.7 GPa
✍ Scribed by Koichi Mimura; Tetsuji Madono; Seiji Toyama; Kenichiro Sugitani; Ryuichi Sugisaki; Sho-ichi Iwamatsu; Shizuaki Murata
- Publisher
- Elsevier Science
- Year
- 2004
- Tongue
- English
- Weight
- 233 KB
- Volume
- 72
- Category
- Article
- ISSN
- 0165-2370
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✦ Synopsis
To examine the behavior of polycyclic aromatic hydrocarbons (PAHs) during shock-induced pyrolysis, we performed shock recovery experiments of various PAHs (naphthalene, anthracene, pyrene, and fluoranthene) at pressures ranging from 12.0 to 33.7 GPa. The shockinduced pyrolysis predominantly produced amorphous carbon. The pyrolysis consists of PAH reactions to synergic actions of thermal and high-pressure factors happening during the order of 1 ms (the first stage) and reactions to a thermal factor under the ambient pressure happening during the order of 10 ms (the second stage). In the first stage, we produced mainly amorphous carbon. In the second stage, the pyrolysis products were secondarily formed PAHs, including mainly methylation and dimerization compounds of the substrate. Because the products of shock-induced pyrolysis for PAHs contained rarely coplanar aromatic hydrocarbons including strongly carcinogenic compounds, shock pyrolysis should have various advantages in the safe decomposition of organic wastes.