Evaluation of Amine Solutions for CO2Absorption by TOC/TN

User Benefits

- Separation and recovery processes for the greenhouse effect gas (GHG) CO₂ by amine solutions can be evaluated by using the TOC-L analyzer. - The concentration of inorganic carbon, such as the concentrations of dissolved CO₂ and hydrogen carbonate ions, can be obtained by inorganic carbon (IC) measurement of amine solutions. - Concentration control of amine solutions is possible by TOC/TN measurement.

Introduction

Global warming, which has become an issue in recent years, is caused by the increasing concentration of greenhouse effect gases (GHG) in the atmosphere. In particular, it is feared that the effects of CO₂ may affect ecosystems at the global scale. As a countermeasure for this problem, research on technologies such as CCS (carbon capture and storage) and CCUS (carbon capture, utilization, and storage) for separation and recovery of CO₂ and reuse of CO₂ by conversion to valuable substances is underway with the aim of realizing carbon neutrality. CO₂ recovery techniques include chemical absorption methods, physical absorption methods, and membrane separation methods. The optimum method is selected based on the physical properties of the discharge source, such as the CO₂ concentration and pressure. Among these various approaches, chemical absorption methods utilizing amine-based solutions, which bond strongly with CO₂ by chemical reaction, have the advantage of applicability to low partial pressures such as combustion off-gas and other sources of CO₂ because of their high reactivity, and various research efforts are in progress. This article introduces an example of measurement of CO₂ capture by amine-based solutions and TN measurement and TOC measurement of the amine solutions by adding a TNM-L total nitrogen measurement unit to Shimadzu TOC-L total organic carbon analyzer.

April 5, 2022 GMT