Inhaltszusammenfassung

Organic binders for the manufacturing of refractory bricks are complex carbon mixtures. These mixtures contain hundreds of very similar compounds, such as polycyclic aromatic hydrocarbons and their heteroatom derivatives. In addition, the majority of these compounds are characterized by their low volatility and solubility. These aspects lead to the fact that, despite intensive research, the exact chemical composition of such carbon mixtures remains unclear. This study presents an approach for...Organic binders for the manufacturing of refractory bricks are complex carbon mixtures. These mixtures contain hundreds of very similar compounds, such as polycyclic aromatic hydrocarbons and their heteroatom derivatives. In addition, the majority of these compounds are characterized by their low volatility and solubility. These aspects lead to the fact that, despite intensive research, the exact chemical composition of such carbon mixtures remains unclear. This study presents an approach for the analysis of complex carbon mixtures using the example of a commercial binder which is needed in refractory industry. In particular, it was shown that high-resolution time-of-flight mass spectrometry (HR-TOFMS) combined with prior sample separation is a powerful tool. Matrix simplification was performed using two-dimensionalgas chromatographic separation (GCxGC) for the volatile fraction. The semi-volatile fraction was separated based on different boiling points using a temperature gradient under vacuum. Due to reduced separation efficiency in the semivolatile fraction, data processing plays an important role. A method for resolution-enhanced data processing was applied,which enabled the detailed visualization of high-resolution mass spectrometric data. The individual compounds could thus be assigned to different substance classes.» weiterlesen» einklappen

Autoren

Klassifikation

DFG Fachgebiet:
Materialwissenschaft

DDC Sachgruppe:
Ingenieurwissenschaften