High-pressure CO2 separation and conversion processes with ionic liquids: COSMO-SAC evaluation, subsea carbon capture, and RWGS reaction.

• Grant number: 21/07155-6
• Support type: Scholarships in Brazil - Post-Doctorate
• Effective date (Start): May 01, 2022
• Effective date (End): April 30, 2024
• Field of knowledge: Engineering - Chemical Engineering - Chemical Process Industries
• Principal researcher: Claudio Augusto Oller do Nascimento
• Grantee: Murilo Leite Alcantara
• Home Institution: Escola Politécnica (EP). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Company: Universidade de São Paulo (USP). Escola Politécnica (EP)
• Associated research grant: 20/15230-5 - Research Centre for Greenhouse Gas Innovation - RCG2I, AP.PCPE

Abstract

Carbon capture and utilization (CCU) technologies can be enhanced by using suitable ionic liquids (ILs). However, the complexity of IL-CO2 interactions makes it challenging to develop IL-based CCU processes, especially at high pressures. In addition, at high-pressures (>73.8 bar) and moderate temperatures (>31°C), the CO2 became a supercritical fluid, presenting other unique properties. These aspects must be considered in the development of high-pressure IL-based CCU processes. The COSMO-SAC model would predict IL-CO2 interaction of two IL-based CCU process developments through this project. One case study would be focused on high-pressure CO2 separation from light hydrocarbons, simulating its removal at a subsea level station of natural gas or oil production. The second case study would be focused on the use of ILs to enhance high-pressure CO2 conversion to CO by the reverse water-gas shift reaction. Both cases are related to implemented projects at the University of São Paulo and the Research Center for Greenhouse Gas Innovation (RCG2I).