Abstract
Thermogravimetric analysis is one of the evaluation means widely used to characterize thermoinduced chemical reaction and mass variation processes. However, the emergence of photothermal characteristics research makes traditional thermogravimetric analysis unable to meet the requirements. Therefore, a novel direct light-driven thermogravimetric analyzer is designed for fast photothermal integrated pyrolysis weight loss measurement based on the principle of high temperature measurement under light flux. The photothermal conversion characteristics are studied by analyzing the calcination progress of the blackened calcium carbonate particles. At the same time, the error and uncertainty analysis of the instrument is carried out. Compared with the conventional thermogravimetric electric heating approach, the direct light-driven thermogravimeter provides the same environment as the actual solar photothermal capture and utilization scenarios and enables getting deep insights into the mechanism of the photothermal conversion and chemical reaction kinetics involved which are consistent with the real solar-thermal energy applications. Its unique photothermal integrated design is also valuable for the composition analysis, kinetic analysis or evaluation of solid-gas balance of the materials, which provides an important analysis method for solar photothermal conversion.
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