| Autor: |
Irene Coralli, Lorenzo Spada, Daniele Fabbri, Seyedeh Rojin Sahriati Pour, Jessica Fiori, Ivano Vassura, Stelios Stefanidis, Angelos Lappas, Lee A. Stevens, Colin E. Snape |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
Journal of Chromatography Open, Vol 5, Iss , Pp 100108- (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2772-3917 |
| DOI: |
10.1016/j.jcoa.2023.100108 |
| Popis: |
Solid sorbents based on silica and polyethyleneimine (PEI) are intensively investigated in the field of carbon capture and storage (CCS). Pyrolysis was proposed as a thermal process to recover the pure silica from exhausted sorbents and convert PEI into potentially useful products, such as alkylated pyrazines. A GC–MS method based on internal standardisation with 2-methoxypyrazine was developed and evaluated to determine the concentration of six pyrazines in the pyrolysis oils of exhausted silica-PEI sorbent pyrolysed at 400, 500, 600 and 650 °C. The most abundant pyrazines were 2-ethyl and 2,3-dimethyl, occurring at concentrations of 5–28 mg g–1, followed by pyrazine, 2-methyl, 2-ethyl-3-methyl and 2-propylpyrazine. The GC–MS results were compared to those from a HPLC-DAD method using the Welch's test. The 37 % discrepancy of concentrations was attributed to spectral interference in LC-DAD. GC was slightly less precise than HPLC, calibration errors were lower and enabled the identification of highly alkylated pyrazines. Both methods provided comparable values of total pyrazine yields (around 4–7 % by weight). |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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