Impurity impacts on the purification process in oxy-fuel combustion based CO2 capture and storage system

Modelling of the CO2 process- and transport chain in CCS systems—Examination of transport and storage processes

“…If the captured CO 2 is not pure, it should be examined if a purification unit is affordable (Li et al, 2009). If the costs are not too high, this extra process would lead to easier operation of the pipeline and well and it would also increase storage volume.…”

The Influence of Modified Atmosphere on Natural Gas Combustion

“…The consequence of fuel combustion in oxygen-enriched atmospheres in O 2 + CO 2 system (replacing nitrogen by CO 2 ), is the reduction of pollutants emissions, mainly NO x (Amann et. al, 2009;Li, Yan & Yan, 2009;Muskał et al, 2008). In the studied system (modified atmosphere: oxygen-enriched air combustion) lower concentrations of nitrogen oxide NO are not obtained, but on the contrary, more than threefold increase in NO concentration was observed (Fig.…”

An Improved CO2 Separation and Purification System Based on Cryogenic Separation and Distillation Theory

“…At the same separation pressure of 60 bar and initial CO 2 concentration of 80%, the CO 2 purity in the product of the CO 2 -H 2 mixture is 99.47%, for the CO 2 -N 2 mixture it's 98.01%, whereas for CO 2 -O 2 and CO 2 -Ar mixtures, it sharply reduces to 95.5% and 95.69%, respectively. This is because there exist significant differences in the physical properties of the different impurity gases, which affect the thermodynamic properties such as dew and bubble points, heat capacity, enthalpy and entropy of the CO 2 mixture, so the operating conditions and separation performance of the purification process will thus vary accordingly, resulting in different CO 2 purity in the product [27]. Generally, if the physical properties of the impurity gas are distinguished from those of the CO 2 (H 2 for example), it is easier to separate them by high pressure cryogenic separation [31].…”

“…In this case, the refrigeration energy penalty increases substantially, and CO 2 frost formation becomes highly possible, thereby threatening equipment safety [23]. Attention should thus be paid to raising the phase transition temperature of CO 2 to improve the cryogenic separation method and consequently avoid facility freezing problems and high energy penalty [24][25][26][27].…”