Technology Innovation Advancements for Shell Cansolv CO2 capture solvents

摘要

This paper will present the most recent advancements in Shell Cansolv CO2 Capture Technology. The first part of the paper will focus on the CANSOLV DC201 solvent for CO2 capture performance. This solvent has been extensively tested in 2012, 2013 and 2014. It has been proven to be highly effective at reducing energy consumption for the CO2 capture plant, which is at a fixed CO2 removal efficiency ~ 90 %. A detailed description will be provided as to the methodology used by Shell Cansolv to develop a predictive simulation/model for CO2 capture applications. This methodology will be described in a general context, so the process can be applied in the development of other CO2 scrubbing amine solvents models. Instructions on the sequence of parameter estimation and regressions is provided; where it is important to commence model development with an accurate definition of pure component parameters followed by good representation for binary and ternary model parameters. The second part of the paper will explain how the model was developed with a comprehensive set of thermo-physical properties and validated with high quality pilot plant data (1-8 tons CO2/day). The acquisition of high quality pilot plant data is an essential part for the development of a predictive model. A commercial design can only be performed by Shell Cansolv once a simulation/model is validated with real plant data and appropriate margins are identified for critical variables.