- Changes in the solid phase and gas composition resulting from the injected pulse can be investigated.
- Reduction, oxidation, and catalytic processes between solid catalyst and gaseous reactants can be investigated at desired temperatures.
- Very slight processes in the reaction can be monitored, since gas-solid reactions occur only during the duration of a pulse when PulseTA® is used.
- Injection of a known amount of gas into the carrier gas stream of the system during TA-EGA measurements allows for a more reliable quantitative calibration of the MS and FT-IR signals.
- The calibration is achieved by determining the relationship between the amount of the injected gas and the intensity of the MS and/or FT-IR signal(s).
- Sensitivities of less than 0.01 wt% can be easily achieved for the evolved species.
The humidity generator produces defined relative humidity by mixing wet and dry gas flows. A minimum humidity of 5% relative humidity at approx. 30°C (0.2% absolute humidity) can be achieved. The maximum humidity amounts to 90% relative humidity at 70°C (30% absolute humidity). Using a humidity generator requires a water vapor furnace for concentrations of ≥ 2% absolute humidity (100% relative humidity at 15°C). For low humidity (≤ 2%) any furnace can be used; however, condensation must be avoided. Humid atmosphere concentration is software-controlled (programmable ramps/steps). The system allows for easy refill while a measurement is running.
The OTS® oxygen trap system for the STA 449 F1/F3 Jupiter® and DSC 404 F1/F3 Pegasus® systems removes traces of residual oxygen in the gas atmosphere inside the instrument. A residual oxygen content of <1ppm can be achieved. Thanks to the getter ring, it is possible to almost entirely eliminate the residual oxygen after evacuation. Such low oxygen concentrations cannot be achieved unless the instrument is vacuum-tight and equipped with an evacuation system.
