Experimental study on supercritical water oxidation of oily sludge with auxiliary fuels

Zhang, Jie; Li, Hu‐Lin; Liu, Qian; Zhang, Hao; Li, Xiaoliang; Xing, Zheng

doi:10.1016/j.supflu.2023.105964

Cited by 8 publications

(2 citation statements)

References 64 publications

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“…There are ways to further enhance the degradation of organic compounds, such as staged oxidation, 39,40 as well as the addition of catalysts 23,24 and auxiliary fuels. 41 These various methods have been widely employed. Staged oxidation involves dividing the entire oxidation process into several parts, undoubtedly adding complexity to the entire system.…”

Section: Effect Of Catalysts On Cod Removal Efficiencymentioning

confidence: 99%

Experimental investigation and thermomechanical performance evaluation of supercritical water oxidation of n‐dodecane/tributyl phosphate

Mi,

Wang,

Sun

et al. 2024

J of Chemical Tech & Biotech

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BACKGROUNDNuclear energy has brought immense benefits while also generating a large amount of wastewater that urgently needs to be processed. Supercritical water oxidation (SCWO) technology serves as an efficient method for wastewater treatment. In this study, a SCWO experiment was carried out with organic solvent of 30% tributyl phosphate (TBP) and 70% n‐dodecane. This study investigated the operating parameters and the effects of enhanced oxidation techniques on chemical oxygen demand (COD) removal efficiency. An organic solvent SCWO process was developed, and its energy and exergy efficiencies were assessed using Aspen Plus.RESULTSThe COD removal was about 96.18% at the experimental parameters of 500 °C, 10 min, 25 MPa, oxidation coefficient of 1.5 and material concentration of 4 wt%. COD removal increased by 3.09% with the addition of CeO2. Finally, the overall energy and exergy efficiencies of the SCWO system were found to be 58.8% and 9.1% respectively by Aspen Plus.CONCLUSIONIt was found that the reaction temperature had the greatest effect on the COD removal rate compared with other reaction parameters. The decomposition of organic solvents can be divided into two stages, fast and slow, and the addition of alkali and catalyst can effectively promote the decomposition of waste organic solvents. The experiments showed that SCWO is feasible for the treatment of n‐dodecane/TBP. © 2024 Society of Chemical Industry (SCI).

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Section: Effect Of Catalysts On Cod Removal Efficiencymentioning

confidence: 99%

Experimental investigation and thermomechanical performance evaluation of supercritical water oxidation of n‐dodecane/tributyl phosphate

Mi,

Wang,

Sun

et al. 2024

J of Chemical Tech & Biotech

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“…Hence, this process usually is combined with a heat recovery or utilization unit for largely recovering energy. Compared to traditional treatment methods, SCWG offers other advantages, such as high efficiency, no need for chemical additives, minimal carbon dioxide emissions, and the generation of useful energy and resources (Jiang et al 2020;Li et al 2020;Zhang et al 2023). Researchers have conducted experiments using supercritical water for hydrogen-rich gas production from various organic waste materials, including pig manure (Ren et al 2022), kitchen waste (Su et al 2020), sludge (Gong et al 2022), and biomass (Wang et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Supercritical water gasification of oily sludge and its life cycle assessment

Qiu,

Liu,

Fang

et al. 2024

BioRes

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A supercritical water gasification strategy was employed to investigate the effects of different conditions on hydrogen-rich gas production from oily sludge, based on the Aspen Plus platform. Meanwhile, the entire process was assessed with a life cycle assessment (LCA) method. The results indicated that the gas yield was decreased by increasing the sludge concentration. The yield of hydrogen-rich gas (H2 and CH4) was improved with increasing temperature. Higher temperatures were more favorable to gas production. Excessive addition of oxidants could reduce the CH4 yield, thereby lowering the energy efficiency of the process. The LCA analysis found that, in comparison to the stages of raw material transportation, heat recovery, and wastewater treatment, the effect of more CO2 produced in cooling and separation stage on global warming potential (GWP) was more obvious. The corresponding process can be improved to mitigate the environmental effect of the whole gasification.

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Effect of methane addition on supercritical water oxidation of poultry manure in the flow mode

Fedyaeva,

Alekhin,

Morozov

et al. 2024

Biomass and Bioenergy

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Experimental study on supercritical water oxidation of oily sludge with auxiliary fuels

Cited by 8 publications

References 64 publications

Experimental investigation and thermomechanical performance evaluation of supercritical water oxidation of n‐dodecane/tributyl phosphate

Experimental investigation and thermomechanical performance evaluation of supercritical water oxidation of n‐dodecane/tributyl phosphate

Supercritical water gasification of oily sludge and its life cycle assessment

Effect of methane addition on supercritical water oxidation of poultry manure in the flow mode

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