Application of evolved gas analysis

This paper describes a set of experiments in which a low-load diesel soot sample was progressively de-gassed at successively higher temperatures in vacuo, and the changes in microstructure and SSA were compared with the released volatiles. The sample was heated successively at 120, 190, 290 and 340 o C, and each volatile fraction collected. The SSA and pore character were determined before and after each heating stage. This technique was also compared with standard methods of UHC extraction, viz., ultrasonication and soxhlet extraction