Additives to improve the CO2 capture process using chemical solvents: a review

The current chemical solvents used in the carbon dioxide (CO2) capture process have allowed an adequate treatment of this greenhouse gas; however, new solvents have being considered due to the operational problems that traditional solvents might cause. Research on chemical additives is needed to improve efficiency during the CO2 capture process while keeping the existing industrial infrastructure and avoiding higher costs. For this reason, the need to generate a database gathering information on this type of additives is evident. The following work is presented as a bibliographic compilation of different researches that propose solvents to improve the CO2 capture process. Different solvents are analyzed considering kinetic and thermodynamic aspects or operational improvements in the infrastructure, such as corrosion reduction and reduction in solvent losses by evaporation. In this review, different works published between 2000 and 2020 are considered that focus on (i) improving the capture process, (ii) gathering data of CO2 emissions by productive sectors, and (iii) addressing the problems and inconveniences in equipment that entails the use of conventional solvents. The search strategy was defined in three steps. First, selection of databases and keywords that best fit the area of study. Second, a compilation of published research papers related to CO2 capture. Third, review and analysis of trends over the last 20 years regarding new solvents, type of gas used in the capture processes, organization of additives according to their chemical nature, and the type of improvement, kinetic, thermodynamic, or operational that the additives provide. It was concluded that there is sufficient evidence to consider that compounds containing an amino group, and especially alkanolamines, are the most widely used additives for CO2 capture processes. Since they have a hydroxyl group in their structure, they facilitate their dissolution, and due to the great variety of compounds, they exhibit kinetic, thermodynamic, and operational improvements. It is expected that this work will allow the development of further research focused on CO2 capture since it is not only a domestic problem but also of international interest.

• المؤلف الرئيسي: Loachamin Maldonado, Dennis Patricio (author)
• التنسيق: bachelorThesis
• اللغة: eng
• منشور في: 2021
• الموضوعات: Dióxido de carbono (CO2); Proceso de captura; Aditivos; Aminas; Solventes químicos; Carbon dioxide (CO2); Capture process; Additives; Amines; Chemical solvents
• الوصول للمادة أونلاين: http://repositorio.yachaytech.edu.ec/handle/123456789/359