Abstract
Mass flow meters (MFMs) are widely used to secure reliable flow rates based on the mass value of the gas being measured. However, chemical reactions produce various kinds of gases, and their composition also changes in real time. Thus, there may be a large deviation in the gas flow if the gases’ composition and its mixing ratio are not known. In this study, we derived a gas flow rate measurement method using a chemically stable chemical specie and verified the precision of the proposed method through comparative analysis with an MFM. The flow rate by this method showed reliable results in both single and mixed gases. Notably, the results were within ±2.74% of the injected flowrate values in the gas mixtures. This method is expected to be able to fundamentally overcome the limitations of the mechanical flowmeter because it is not affected by changes in gas composition or mixing ratio during the reaction.
Highlights
Mass flow meters (MFMs) are widely used to secure reliable flow rates based on the mass value of the gas being measured
Because the MFM was calibrated with nitrogen only, the flow rate measured by the MFM significantly deviated
We analyzed the applicability of the conservative element as a reliable method for measuring gas flow rate during a chemical reaction by comparing it with a method for measuring gas flow rate during a chemical reaction by comparing it with a mechanical device (MFM)
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. The qualitative and quantitative analyses of gas components generated during chemical reactions provide information for estimating the reaction mechanism [1,2,3]. Previous studies have not reliably determined the flow rate, but rather have estimated the reaction mechanism through simple concentration analysis [2]. Various types of flow meters can be applied to determine the gas flow rate, obtaining more reliable information is limited due to the issue of gas composition change following the generation of various types of gases during the reaction process
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