Monitoring coal-tar pitch composition changes during air-blowing by gas chromatography |
| |
Authors: | Domínguez A Blanco C Santamaría R Granda M Blanco C G Menéndez R |
| |
Institution: | Instituto Nacional del Carbón, CSIC, Apartado 73, 33080 Oviedo, Spain. padilla@incar.csic.es |
| |
Abstract: | A series of air-blown coal-tar pitches was studied by GC and GC-MS in order to achieve a deeper understanding of the behaviour of the different pitch components during air-blowing. Compounds present in the parent pitch were identified and quantified and then compared to those present in the air-blown pitches. The compounds observed were identical before and after the treatments, but the concentration of each compound changed with the treatment to a different extent depending on its molecular structure and consequently its reactivity to oxygen. The most reactive compounds were those with a mehylene-bridge in a five member ring, followed by those with a methyl group in their structure. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|