(343g) Novel Technology for Studying Mixing and Reaction State Using Electrical Resistance Tomography
AIChE Annual Meeting
2021 Annual Meeting
Topical Conference: Sensors
General Poster Session in Sensors - Virtual
Monday, November 15, 2021 - 10:30am to 12:00pm
Our ERT system can collect more than 1000 datasets per second with 104 data points per dataset. These real-time datasets contain rich information that can be extracted by data processing. The test case of titration is currently done in a small vessel that acts as a batch reactor, which provides the best similarity to the future application. 0.1 molar hydrochloric acid is titrated with 1.0 molar sodium hydroxide to produce sodium chloride. This reaction has an extensive conductivity range and provides the best case for identifying the reaction's endpoint. Figure 1 shows an online real-time ERT measurement to detect the titration reaction's endpoint at 88.0 seconds. When compared to other methods to find the endpoint of the reaction, it can be seen that the start of the upward trend after the dip matches up closely to those measured endpoints. Additionally, more accurate time points can be obtained by the ERT system comparing to other methods. Another significant benefit of the 2D planar measuring is the ability to monitor the fluid mixing. Figure 2 reveals a location with slower mixing relative to the rest of the vessel. Knowing where these spots exist allows for monitoring the products for any potential defects due to this imperfect mixing. The future work is testing larger-scale vessels and a variety of chemical reactions. This novel technology can be potentially used in large reactors where visibility, testing access, or conditions restrict access to the vessel, such as higher pressure and temperatures.