Effect of Torrefaction Temperature on Lignin Distribution of <scp>Larix kaempferi</scp>C. and <scp>Liriodendron tulipifera</scp>L. Cubes and the Impact of Binder on Durability of Pellets Fabricated with the Torrefied Cubes

Oh, Seung‐Won; Park, Dae Hak; Lee, Soo Min; Ahn, Byoung Jun; Ahn, Sye Hee; Yang, In

doi:10.1002/ep.13190

Cited by 5 publications

(2 citation statements)

References 48 publications

(94 reference statements)

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“…The glucose content was reduced (22%) after torrefaction at 225 • C. The reduction after torrefaction is related to the degradation of hemicellulose and cellulose as sources of glucose. However, the glucose content of T 275 increased to 27% compared with that of T 225 because of the fragmentation of hemicellulose via aromatization and crosslinking of degraded sugars [34]. After alkali treatment, the glucose content increased, except in T 300 .…”

Section: Sugar Composition Of Biomassmentioning

confidence: 95%

Synergistic Effects of Torrefaction and Alkaline Pretreatment on Sugar and Bioethanol Production from Wood Waste

Cahyanti,

Shanmugam,

Kikas

2023

Energies

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Abundant availability of lignocellulosic biomass (LCB) coupled with diverse pretreatment methods have made it a promising option for energy production. However, it faces several challenges, some of which can be overcome by integrating pretreatment processes. The present study aims to optimize the integration of two different pretreatment methods—torrefaction (to reduce moisture content and fractionate biomass) and alkaline pretreatment of wood waste (to delignify biomass)—and utilize it for bioethanol production. Pretreatment performance was evaluated based on delignification, biomass hydrolysis, and bioethanol production. Initially, torrefaction was performed in a continuous reactor at a temperature range of 225–300 °C, followed by optimization of the critical parameters of alkaline pretreatment of torrefied wood waste (TWW), that is, the temperature, reaction time, solid–liquid ratio, and alkali concentration. Subsequently, the chemical and carbohydrate compositions of raw wood waste (RWW) and TWW were studied, followed by enzymatic hydrolysis and bioethanol fermentation. Integrated pretreatment positively impacted the cellulose and glucose contents of raw and torrefied biomass at lower temperatures. The enzymatic hydrolysis of TWW treated with alkali produced higher levels of glucose and bioethanol than (stand-alone) TWW. These results can be used as a basis for choosing the most suitable pretreatment for enhanced biomass conversion.

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Section: Sugar Composition Of Biomassmentioning

confidence: 95%

Synergistic Effects of Torrefaction and Alkaline Pretreatment on Sugar and Bioethanol Production from Wood Waste

Cahyanti,

Shanmugam,

Kikas

2023

Energies

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“…The associated merits, challenges, and recommendations are briefly highlighted in Table 5. The energy produced from the by-products of these processes can be utilized to operate the treatment facility or be sold to the power grid, thus generating extra income [107] Processes Torrefied biomass has a higher calorific value, making it a strong feedstock as biofuel [112], and its high energy density can significantly decrease transport costs [113]. However, there are challenges associated with the use of torrefied biomass.…”

Section: Torrefied Biomass With Vacuum Bw Challenges and Recommendationmentioning

confidence: 99%

Effectiveness of Torrefaction By-Products as Additive in Vacuum Blackwater under Anaerobic Digestion and Economic Significance

Chiang,

Claire,

Han

et al. 2023

Processes

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Blackwater (BW) is a vital source of bio-energy and nutrients for the sustainable development of human society in the future owing to its organic and nutrient-rich properties. Therefore, biomass and water must be used properly to avert environmental challenges and promote the viable development of nutrient recovery and bioenergy production. Moreover, vacuum-collected BW (VCBW) as a renewable source can offer outstanding potential in bioenergy and nutrition sustainability. This review reports previous and present investigations on decentralized wastewater, water conservation, the recovery of nutrients, and the ecological implications and economic significance of integrating torrefaction with anaerobic digestion (AD), notably the continuous stirred tank reactor. The mixtures (torrefied biomass and VCBW) can be converted into valuable materials by combining torrefaction and AD technology for environmental and economic gains. This way, the heat and energy used in the process could be reused, and valuable materials with high energy contents could be obtained for financial gain. The economic evaluation shows that the minimum selling price of the torrefied biomass to reach breakeven could be reduced from 199 EUR/t for standalone torrefaction to 185 EUR/t in the case of torrefaction integrated with AD. The concept can be applied to an existing waste- or wastewater-treatment facility to create a cleaner and more efficient BW with biomass recycling. However, a comprehensive techno-economic analysis must be conducted: (1) Application of tor-biochar towards vacuum BW in AD process is feasible; (2) Digestate as a soil conditional to improve soil condition is effective; (3) Mesophilic and thermophilic conditions are applicable on AD vacuum BW; (4) Economic significance indicates technological feasibility.

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Co‐pelletization of edible fungi cultivation residue and pine sawdust: The optimal variable combinations

Jiang

et al. 2019

Env Prog and Sustain Energy

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Co‐pelletization of edible fungi cultivation residue and pine sawdust would help reduce the problems of residue disposal and resource limitation of pellet production. The objective of this work was to obtain the optimal variable formulations for pellets production from blends of Flammulina velutipes residue and Pinus sylvestris var. mongolica Litv. sawdust. Response surface methodology was employed to design the experiments. A uniaxial piston‐cylinder compression apparatus was used to produce pellets. The effects of variables of residue adding amount, moisture content, temperature, and pressure on responses of specific energy consumption, relaxed density, and Meyer Hardness were analyzed. Variance analysis of the data demonstrates that the differences between adjusted R2 and predicted R2 values are all within 0.2. The optimal variable combinations with residue content varying 0–40% were obtained according to the set response goals. Validation experiments were carried out using the same apparatus and relative percentage errors between the response predicted values and the experimental results were analyzed to improve the models. Most final errors were reduced below 10% indicating the high accuracy of the models. Further calculation of calorific value and ash content manifests that pellet performances could be improved by co‐pelletization.

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Effect of Torrefaction Temperature on Lignin Distribution of Larix kaempferiC. and Liriodendron tulipiferaL. Cubes and the Impact of Binder on Durability of Pellets Fabricated with the Torrefied Cubes

Cited by 5 publications

References 48 publications

Synergistic Effects of Torrefaction and Alkaline Pretreatment on Sugar and Bioethanol Production from Wood Waste

Synergistic Effects of Torrefaction and Alkaline Pretreatment on Sugar and Bioethanol Production from Wood Waste

Effectiveness of Torrefaction By-Products as Additive in Vacuum Blackwater under Anaerobic Digestion and Economic Significance

Co‐pelletization of edible fungi cultivation residue and pine sawdust: The optimal variable combinations

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