Liquid and Dense Phase Thermal Conductivity Measurements of CO₂ + N₂ and CO₂ + CH₄ Mixtures at Temperatures from 223 K to 308 K and Pressures up to 20 MPa

Abstract

New data are presented for the thermal conductivity for CO 2 -rich binary mixtures in the liquid and dense phase, for temperatures between 223 and 308 K and pressures up to 20 MPa. Binary mixtures with mole fractions of 5% nitrogen and 5, 10, and 20% methane were investigated. Understanding the fluid properties of CO 2 -rich mixtures at relevant conditions is important for the deployment of efficient and robust systems for carbon dioxide capture and storage (CCS), but except that for water-rich CO 2 + H 2 O mixtures, no thermal conductivity data on liquid or dense phase mixtures including CO 2 are known to be reported prior to this work.

On the Design of Recuperator for Transcritical Cycle Adopting CO2‐Based Mixture as Working Fluid: A Focus on Transport Properties Prediction

“…As regards the thermal conductivity, the comparison between the scarce experimental data from the literature and the considered models is illustrated in Table 3 . The recent data of Patek et al [ 37 ] have been selected for the comparison of the CO 2 + CH 4 mixture in the gas phase, while the recent data of Kim et al [ 38 ] have been used for the dense‐liquid phase.…”