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Table 3 Compounds identified by the present study by using GC-MS and LC-MS-QTOF in AEEA/CO2/H2O system at 135 °C

From: Thermal degradation of aqueous 2-aminoethylethanolamine in CO2 capture; identification of degradation products, reaction mechanisms and computational studies

Compound Abb. MW (g/mol) Structures Analytical technique
Diethanolamine DEA 105 GC–MS
LC-MS-QTOF
1-Piperazineethanol HEP 126 GC–MS
LC-MS-QTOF
1,4-Bis(2-hydroxyethyl)piperazine BHEP 130 GC–MS
LC-MS-QTOF
2-Imidazolidinone HEI 86 GC–MS
1-(2-Hydroxyethyl)-2-imidazolidinone HEIA 130 GC–MS
LC-MS-QTOF
2-((2-Aminoethyl)-(2-(2-aminoethylamino)-(ethylamino)ethanol AAEEA* 191
2-hydroxyethyl-2-oxazolidone HEOD 131 GC–MS
LC-MS-QTOF
Succinimide Succ 99 GC–MS
N-Methylsuccinimide MSucc 113 LC-MS-QTOF
N,N’-Dimethyl-2-imidazolidinone DMDZ 114 GC–MS
4-[(2-Hydroxyethyl)(nitroso)amino]-1-butanol HNAP 162 LC-MS-QTOF
1-Nitroso-4-piperidinol NP 117 LC-MS-QTOF
4-[Butyl(nitroso)amino]-2-butanol BNAB 173 LC-MS-QTOF
N-(Butyl(nitroso)amino)methyl)acetamide BNAMA 173 LC-MS-QTOF
(3-Aminopropyl)morpholine AMM 144 GC–MS
N-(2-hydroxyethyl)-N -methylpiperazine MPE 144 GC–MS
1,4-Diformylpiperazine DFP 142 GC–MS
Homoserine Hom 119 GC–MS
1-Methyl-4-nitrosopiperazine MNP 129 LC-MS-QTOF
Pyrazole-1-ethanol PE 112 LC-MS-QTOF
1-Piperazineethanamine AEP 129 GC–MS
1-(2-(2-Hydroxyethoxy)ethyl) piperazine HEEP 174 GC–MS
LC-MS-Q TOF
N-[2-[3-[N-Aziridyl]propyl]aminoethyl]piperazine APAP 212 GC–MS
Tetraethylenepentamine TEP 191 GC–MS