A single-component water-lean post-combustion CO₂ capture solvent with exceptionally low operational heat and total costs of capture – comprehensive experimental and theoretical evaluation

Abstract

A comprehensive evaluation of a recently developed water-lean amine-based solvent, namely N-(2-ethoxyethyl)-3-morpholinopropan-1-amine (2-EEMPA), has been performed to analyze its post-combustion CO2 capture performance. This evaluation comprises (1) fundamental characterization of...

Amphilic Water‐Lean Carbon Capture Solvent Wetting Behavior through Decomposition by Stainless‐Steel Interfaces

“…This finding matches the negligible interactions of 2-EEMPA with steel as simulations above show. The lack of degradations also mirrors our previous studies showing high durability of 2-EEMPA running on simulated flue gas for 40 h. [18] Conversely, 60 % of 1-IPADM-2-BOL decomposed in the anhydrous condition, and degradation increased to 95 % with 5 wt.% added water. The only detectable decomposition products in the gas and liquid phase of 1-IPADM2-BOL were 1,3-dimethyl-2-imidazolidinone and 1-amino 2-propanol in a 1 : 1 ratio, which indicates that the degradation of the guanidine core appears to be hydrolysis of the guanidine core, as those two compounds are reagents used to synthesize 1-IPADM2-BOL.…”

“…[17] We recently confirmed approximately $5 per tonne CO 2 could be saved for by replacing 316-stainless-steel absorber and stripper packing with plastics such as polypropylene or nylon [6,6]. [6,18] Granted, not all plastics would be practical under CCS conditions because plastics would need to be mechanically stable at conditions of solvent-based processing, i. e., the stripper column (~120 °C). Replacing just the absorber packing provides an avenue to decrease $2.5 per tonne CO 2 .…”

“…Replacing just the absorber packing provides an avenue to decrease $2.5 per tonne CO 2 . [6,18] Other groups have started assessing the performance and durability of plastic packing, including new advanced packing geometries spurred on by advances in additive manufacturing and 3-D printing. [19] Although attractive, plastic packing may not be a panacea for aqueous solvents due to the higher contact angle and surface tension of water as compared to organics that comprise water-lean solvents.…”

Chemoinformatics-Driven Design of New Physical Solvents for Selective CO2 Absorption

“…94 The value is extremely high (~0.04 at 1 atm and 313K) as compared to other physical solvents (see below). Hence, considering the growing interest in water-lean solvents 95 , including the ones based on pure amines 96 , we have chosen three industrial amines (MDEA, EDEA, DEAE-EO) for the experimental assessment of CO 2 physical solubility.…”

Next steps for solvent-based CO2 capture; integration of capture, conversion, and mineralisation

“… 7 While not the lowest energy carbon capture and separation (CCS) approach, solvents can achieve 60% thermodynamic efficiency, while having the lowest total costs of capture ($45–47.1 (USD) per tonne CO 2 ). 8 Most importantly solvents are the only technologies that can currently be manufactured at the requisite scale 9 for point-sources such as coal and natural gas powerplants, cement kilns and steel furnaces.…”