Synergistic effect of washing pretreatment and co-pyrolysis on physicochemical property evolution of biochar derived from bio-oil distillation residue and walnut shell

Diao, Rui; Sun, Mengchao; Huang, Yitao; Zhu, Xun

doi:10.1016/j.jaap.2021.105034

Cited by 22 publications

(2 citation statements)

References 49 publications

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“…The peak was largest for raw sorghum, and slightly smaller for washed sorghum. Diao et al ( 2021 ) also reported a similar reduction of the 3350 cm −1 peak by water washing. For the hydrochar, the peak decreased as the reaction time increased.…”

Section: Resultsmentioning

confidence: 64%

Effects of potassium on hydrothermal carbonization of sorghum bagasse

Yoshimoto

Luthfi

Nakano

et al. 2023

Bioresour. Bioprocess.

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Hydrothermal carbonization (HTC) reacts with biomass in water at a high temperature and pressure to produce hydrochar with a higher heating value (HHV) and lower ash content than dry torrefaction. The high potassium content in biomass can promote thermochemical conversion; however, it lowers the melting temperature of the ash, causing slugging and fouling. Therefore, this study, investigated the effect of potassium on the HTC of sorghum bagasse by comparing the removal of potassium by washing with the addition of K2CO3. Consequently, the ash content was the highest in the potassium-added hydrochar and was 3.81% at a reaction time of 2 h. Elemental analysis showed that the lower the potassium content, the higher the carbon content, and the hydrochar with potassium removed by water washing at a reaction time of 3 h had the highest carbon content at 68.3%. Fourier transform infrared spectrometer showed dehydration and decarboxylation reactions due to HTC, but no significant differences were observed between the potassium concentrations. The mass yield decreased with increasing potassium content, and was 27.2% for the potassium-added hydrochar after 3 h. This trend was more pronounced with increasing reaction temperature. On the other hand, HHV was not affected by the potassium content. Therefore, the energy yield was similar to the weight yield. Thermal gravimetry and derivative thermal gravimetry (TG-DTG) analysis showed that higher potassium tended to accelerate the decomposition of lignin and decrease the oxidation temperature. Graphical Abstract

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Section: Resultsmentioning

confidence: 64%

Effects of potassium on hydrothermal carbonization of sorghum bagasse

Yoshimoto

Luthfi

Nakano

et al. 2023

Bioresour. Bioprocess.

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show abstract

“…Studies have shown that washing pretreatment is a promising pre-hydrolysis method, which is particularly effective for lignocellulosic biomass. It can destroy the structure of biomass before pyrolysis, remove part of inorganic matter, and improve the carbon content of biochar (Diao et al, 2021). Dilute acid pretreatment is a widely used chemical pretreatment method for biomass, and the commonly used acid solutions are H 2 SO 4 , HCl, HNO 3 , and so on.…”

Section: Introductionmentioning

confidence: 99%

Microwave-Assisted Camellia oleifera Abel Shell Biochar Catalyzed Fast Pyrolysis of Waste Vegetable Oil to Produce Aromatic-Rich Bio-Oil

Xia

Ruan

et al. 2022

Front. Energy Res.

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In this work, Camellia oleifera Abel shell was used as a feedstock to prepare biochar by HNO3 impregnation and pyrolysis. The biochar was used for the catalytic pyrolysis of waste vegetable oil to prepare bio-oil. Experimental results showed that HNO3 solution treatment had an important effect on the groups and structure of the biochar catalyst. When the solid/liquid ratio of pretreatment was 1:3, the Brunauer–Emmett–Teller specific surface area of the 1:3–600°C biochar is 392.65 m2/g, which is approximately 677 times higher than that of untreated biochar. Moreover, the biochar catalyst had a remarkable catalytic performance. The selectivity of the monocyclic aromatic hydrocarbon in the bio-oil was up to 78.82%, and the oxy-compound could be completely removed at the catalytic temperature of 600°C. However, the increase of the catalyst-to-waste vegetable oil ratio and catalytic temperature decreased the bio-oil yield.

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Recent Development, Challenges, and Breakthroughs of Thermochemical Conversion Technologies

Ofori-Boateng

2024

Sustainability of Thermochemical Waste Conversion Technologies

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Synergistic effect of washing pretreatment and co-pyrolysis on physicochemical property evolution of biochar derived from bio-oil distillation residue and walnut shell

Cited by 22 publications

References 49 publications

Effects of potassium on hydrothermal carbonization of sorghum bagasse

Effects of potassium on hydrothermal carbonization of sorghum bagasse

Microwave-Assisted Camellia oleifera Abel Shell Biochar Catalyzed Fast Pyrolysis of Waste Vegetable Oil to Produce Aromatic-Rich Bio-Oil

Recent Development, Challenges, and Breakthroughs of Thermochemical Conversion Technologies

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