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Suitability of thermogravimetry and differential thermal analysis techniques for characterization of pitches

✍ Scribed by Amelia Martínez-Alonso; Jenaro Bermejo; Marcos Granda; Juan M.D. Tascón

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
790 KB
Volume
71
Category
Article
ISSN
0016-2361

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✦ Synopsis

The pyrolysis of a number of coal tar and petroleum pitches was studied by means of thermogravimetry, derivative thermogravimetry and differential thermal analysis (DTA). Acenapthylene was used as a model compound to interpret the results of pitch pyrolysis. DTA exo-and endothermal peaks were assigned to different types of phenomena such as devolatilization, polymerization, condensation and cracking. It was found that endothermal phenomena (devolatilization) are prevalent for binder coal tar pitches, whereas exothermal phenomena predominate for petroleum pitches. Results obtained with various pitch fractions provided evidence of interactions among constituents of fractions.

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✍ Jenaro Bermejo; Marcos Granda; Rosa Menéndez; Juan M.D. Tascón 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 941 KB

Seventeen pitches differing in origin, preparation method, and foreseeable use were fractionated by extrography into classes of compounds. The distribution of pitch constituents among extrographic fractions allowed one to characterize the various pitches according to their chemical composition. The