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CO2 Solubility in Fast Pyrolysis Bio-oil

Baehr, Clarissa 1; Acar, Ramazan 1; Hamrita, Chaima 1; Raffelt, Klaus 1; Dahmen, Nicolaus 1
1 Institut für Katalyseforschung und -technologie (IKFT), Karlsruher Institut für Technologie (KIT)

Abstract:

Preheating and the use of additives, such as alcohols, are common strategies to treat fast pyrolysis bio-oil after production or before its intended use. Such strategies lower the viscosity of bio-oil and slow chemical reactions occurring in bio-oil during storage. Furthermore, they influence the physical-chemical properties, environmental performance, and cost of the final product. This work suggests the use of CO2 as an alternative and environmental strategy. In contrast to other additives, CO2 has the advantage of being a byproduct of the pyrolysis process. To assess CO2 as an additive and solvent for bio-oil, solubility data on CO2 in acetol, pure bio-oil, and mixtures of bio-oil with an added compound are provided. Experiments were conducted at 50 °C and pressures of 20–100 bar. As additional compounds, acetic acid, acetol, furfural, guaiacol, and water are deployed. The results showed that the CO2 solubility is below 0.1 wt % at subcritical pressures but elevated at supercritical pressures. At 95 bar, the CO2 solubility equates to 0.45 wt %. This is below the CO2 solubility of butanol, which accounts for 0.6–0.7 wt % at the same pressure and is generally higher than the solubility in bio-oil. ... mehr

Zugehörige Institution(en) am KIT Institut für Katalyseforschung und -technologie (IKFT)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 27.09.2023
Sprache Englisch
Identifikator ISSN: 0888-5885, 1520-5045
KITopen-ID: 1000163499
HGF-Programm 38.05.01 (POF IV, LK 01) Anthropogenic Carbon Cycle
Erschienen in Industrial & Engineering Chemistry Research
Verlag American Chemical Society (ACS)
Band 62
Heft 38
Seiten 15378–15385
Vorab online veröffentlicht am 13.09.2023
Nachgewiesen in Web of Science
Dimensions
OpenAlex
Scopus
Globale Ziele für nachhaltige Entwicklung Ziel 7 – Bezahlbare und saubere EnergieZiel 12 – Nachhaltiger Konsum und Produktion

Verlagsausgabe §
DOI: 10.5445/IR/1000163499
Veröffentlicht am 26.10.2023
Originalveröffentlichung
DOI: 10.1021/acs.iecr.3c02070
Scopus
Zitationen: 1
Web of Science
Zitationen: 1
Dimensions
Zitationen: 1
Seitenaufrufe: 63
seit 26.10.2023
Downloads: 71
seit 01.12.2023
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