Quantitative Gas Evolution Analysis via Combination of Online Thermal Mass Flow and Mass Spectrometry Data

A unique methodology has been developed to identify and quantify gas evolution associated with a chemical reaction, where multiple gas components are generated. This methodology employs the use of multiple process analytical technologies: reaction calorimetry, online mass spectrometry, and gas evolution measurement via a thermal mass flow meter. The technique is supported by an in-house Excel macro that resolves ion overlaps in the mass spectrometer data. Careful synchronization of the separate analytical instrumentation is critical to obtaining accurate data. The identity, evolution rates, and quantification of each gas generated are determined. This information is vital for pilot plant and manufacturing facilities to determine if they have the capability to ensure a basis of safe operation for processes that generate multiple, noncondensable, hazardous gases.