[Analysis Case] Quantitative Analysis of CO2 Emitted During Cement Heating

One method to understand CO2 emissions is the TG-MS (Thermogravimetric Mass Spectrometry) method, which allows for quantitative analysis of CO2.

This report introduces a case where CO2 generated from commercially available cement was quantified when heated under a simulated air atmosphere (He/O2=4/1 (v/v)). **[Analysis Sample]** Commercial powder cement **[Analysis Equipment]** TG-DTA: Rigaku Thermo plus EVO2 GC-MS: Agilent 8890GC/5977B Inert Plus **[Analysis Method and Results]** CO2 generated from the sample was quantified using the TG-MS method while heating the sample from around 30°C to 1,000°C (20°C/min) under a simulated air atmosphere. After creating a calibration curve (Figure 1) using standard substances, a SIM ion thermogram was drawn using the characteristic ion of CO2 generated from the sample (m/z 44), and the amount of CO2 generated in the temperature range of 513 to 825°C was determined. The results are shown in Table 1. As a result, it was found that the sample measured generated 30 wt% of CO2. **[Summary]** The TG-MS method allows for the quantification of CO2 generated from the sample over any temperature range. Additionally, since the measurement atmosphere can be chosen from inert gas (He) and simulated air, analysis that simulates the usage environment is possible.

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