The Energy Reducing and Safety Concept for CO2 Injection Platform

Abstract

Abstract The global warming has been focused as severe problem due to climate change, thus a large number of countries endeavor to reduce global warming gas. CCS technology is an inevitable option as long as the renewable energy sources cannot supply energy demand. The development of economical technology regarding CO2 injection is crucial for establishing a presence in the CO2 injection market. Therefore, we need to identify effective pathways to lower the cost of CO2 injection. This study's purposes constructing offshore fixed or floating type platform for CO2 injection with economical option. We conducted several case studies for CO2 injection system with additional process via process simulation, and the results indicated that high efficiency system can reduce electric power consumption by more than half. For the safety of CO2 injection system, we conducted risk assessment of solidification such as dry ice and CO2 hydrate via process simulation and lab scale experiments. The results indicated the risk of dry ice is affected from circumstance and phase of CO2. The CO2 hydrate risk is assessed by conducting a matching experimental data of batch reactor with experimental data of flow reactor. In addition, we conducted pilot-scale CO2 injection experiment to verify process simulation results and find consideration for design philosophy and operation philosophy. The results of pilot-scale experiment presented that various factors can be reflected in operation philosophy such as start-up, emergency stop. Furthermore, multi-phase flow was also considered during make up of designing pressure and temperature, which was also verified via fluid simulation. The overall results can be utilized to economical CO2 injection platform design. The results of this paper can introduce options to reduce electrical power consumption of CO2 injection system. In addition, the essential consideration can be conducted for designing CO2 injection platform especially in CO2 solidification and multi-phase flow.