Journal article
Treatment of wastewater from biomass pyrolysis and recovery of its organic compounds with char-assisted drying
Fuel, Vol.312, Art. 122825
2022
Abstract
This study proposes a new process that treats pyrolytic wastewater (PWW) from biomass pyrolysis with char-assisted drying. It can be operated at two modes: (I) one-stage drying for PWW treatment; and (II) two-stage drying and condensation for both treating PWW and recovering valuable chemicals (e.g., acetic acid). The process is proved via drying the mixture of a char and a synthetic PWW solution containing acetic acid, acetol, furfural, and phenol at different temperatures (60, 80, and 105 °C) and char-to-PWW mass ratios (1.0, 1.5, and 2.0). The results, supported by density functional theory (DFT) calculations, demonstrate that under Mode I, the char captures over 97.1% of the organic compounds in the PWW at 60 °C and a char-to-PWW ratio of 2.0, while evaporating almost all the water. The evaporated stream can be potentially discharged into the atmosphere without condensation or condensed into wastewater with a significantly reduced content of total organic carbon. Under Mode II, the char-PWW mixture is sequentially dried at 60 and 105 °C, with the exhaust gases being separately condensed. This yields a stream of purified acetic acid solution (concentration: ∼76 wt%) concentrated by a factor of ∼6.3 (compared with the PWW), with a recovery rate of ∼29%.
Details
- Title
- Treatment of wastewater from biomass pyrolysis and recovery of its organic compounds with char-assisted drying
- Authors/Creators
- A.Z. Mofrad (Author/Creator) - Murdoch UniversityX. Gao (Author/Creator) - Murdoch UniversityI. Oluwoye (Author/Creator) - Murdoch UniversityJ-I Hayashi (Author/Creator) - Kyushu UniversityM. Altarawneh (Author/Creator) - United Arab Emirates UniversityH. Wu (Author/Creator) - Curtin University
- Publication Details
- Fuel, Vol.312, Art. 122825
- Publisher
- Elsevier BV
- Identifiers
- 991005541031207891
- Copyright
- © 2021 Elsevier Ltd.
- Murdoch Affiliation
- Harry Butler Institute; School of Mathematics, Statistics, Chemistry and Physics; Centre for Water, Energy and Waste
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 7 Engineering & Materials Science
- 7.139 Energy & Fuels
- 7.139.89 Gasification
- Web Of Science research areas
- Energy & Fuels
- Engineering, Chemical
- ESI research areas
- Engineering