Parametric Process Design and Economic Analysis of Post-Combustion CO2 Capture and Compression for Coal- and Natural Gas-Fired Power Plants

Abstract

For the envisaged large number of commercial-scale carbon capture and storage (CCS) projects that are to be implemented in the near future, a number of issues still need to be resolved, the most prominent being the large capital and operational costs incurred for the CO2 capture and compression process. An economic assessment of the capture and compression system based on optimal design data is important for CCS deployment. In this paper, the parametric process design approach is used to optimally design coal and natural gas monoethanolamine (MEA)-based post-combustion CO2 absorption–desorption capture (PCC) and compression plants that can be integrated into large-scale 550 MW coal-fired and 555 MW natural gas combined cycle (NGCC) power plants, respectively, for capturing CO2 from their flue gases. The study then comparatively assesses the energy performance and economic viabilities of both plants to ascertain their operational feasibilities and relative costs. The parametric processes are presented and discussed. The results indicate that, at 90% CO2 capture efficiency, for the coal PCC plant, with 13.5 mol.% CO2 in the inlet flue gas, at an optimum liquid/gas ratio of 2.87 kg/kg and CO2 lean loading of 0.2082 mol CO2/mol MEA, the CO2 avoidance cost is about $72/tCO2, and, for the NGCC PCC plant, with 4.04 mol.% CO2 in the inlet flue gas, at an optimum liquid/gas ratio of 0.98 kg/kg and CO2 lean loading of 0.2307 mol CO2/mol MEA, the CO2 avoidance cost is about $94/tCO2.

K2CO3-Impregnated Al/Si Aerogel Prepared by Ambient Pressure Drying for CO2 Capture: Synthesis, Characterization and Adsorption Characteristics

“…In this paper, Al-B-20K has a small specific surface area and specific pore volume with an ink bottle-shaped pore, which hinders the internal diffusion process of H 2 O and CO 2 , and the KHCO 3 product layer is easy to block the pores, these factors are not conducive to the occurrence of a carbonation reaction. In addition, scholars generally believe that there are two possible intermediate products of K 2 CO 3 carbonation reaction: K 2 CO 3 ∙1.5 H 2 O and K 4 H 2 (CO 3 ) 3 ∙1.5 H 2 O, and the surface properties of the support and the distribution characteristics of K 2 CO 3 will affect the formation of intermediate products during the carbonation reaction [ 53 , 54 , 55 , 56 , 57 ]. Al-B-20K has strong hydrophilicity, under a watery atmosphere, K 2 CO 3 will react with H 2 O to generate a large amount of K 2 CO 3 ∙1.5 H 2 O.…”

Pre‐combustioncarbon dioxide capture: A thermo‐economic comparison for dual‐stage Selexol process and combinedSulfinol‐Selexolprocess

“…Therefore, the acid gas absorption efficiency varies with change in lean solvent temperature 62 which in turn affects solvent circulation rate. 63 This results in varying the equipment size and utilities demand. Meanwhile, lowering of lean solvent temperature increases chilling load.…”

A Review on Pyrolysis for Sustainable Biomass Conversion

“…Fossil fuels are most required in worldwide industrial societies which are a finite practical convenient source of energy [3]. Depletion of Coal, oil, and gas is evidence of growing global warming with air pollutants such as NO x , SO 2 , and Hg and many chemical fertilizers [4]. Alternative energy source becomes a necessity for those; biomass is an acceptable source as another option in the renewable field [5].…”