High-strength charcoal briquette preparation from hydrothermal pretreated biomass wastes

Wu, Shunyan; Zhang, Shouyu; Wang, Caiwei; Chen, Mu; Huang, Xuewei

doi:10.1016/j.fuproc.2017.11.025

Cited by 91 publications

(38 citation statements)

References 47 publications

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“…Wood has a heterogeneous structure containing hemicellulose, cellulose, lignin, extractives (polysaccharides, proteins, etc. ), and ash forming material (mineral matter) in different proportions . Each component has its own decomposition characteristics under hydrothermal conditions.…”

Section: Resultsmentioning

confidence: 99%

“…), and ash forming material (mineral matter) in different proportions. 13 Each component has its own decomposition characteristics under hydrothermal conditions. Many reactions, such as hydrolysis, dehydration, decarboxylation, and aromatization, can take place during hydrothermal carbonization.…”

Section: T Eamentioning

confidence: 99%

“…Torrefaction has two applications, which are named as “dry torrefaction” and “wet torrefaction” based on process conditions . Dry torrefaction, or “mild pyrolysis,” occurs in inert atmosphere by heating up the material up to 300°C with low heating rates . The solid material (pyrochar or biochar) has lower volatile matter content and higher heating value.…”

Section: Introductionmentioning

confidence: 99%

“…10,11 Dry torrefaction, or "mild pyrolysis," occurs in inert atmosphere by heating up the material up to 300 C with low heating rates. 8,12,13 The solid material (pyrochar or biochar) has lower volatile matter content and higher heating value. Wet torrefaction or "hydrothermal carbonization" proceeds in the presence of water at temperatures around 180-250 C and under autogenous pressures (10-20 bar) in order to take advantage of specific properties of water under critical conditions.…”

Section: Introductionmentioning

confidence: 99%

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Pyrolysis and combustion characteristics and kinetics of wood sawdust and wood sawdust hydrochar

Kabakcı

2019

Env Prog and Sustain Energy

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This study compares the pyrolysis and combustion characteristics with the kinetics of wood sawdust and its hydrochar. Wood sawdust hydrochar was obtained by the hydrothermal treatment of wood sawdust (biomass/water: 1 g/4 mL) at 220°C, where the residence time was set as 90 min. After hydrothermal carbonization, carbon content and heating value were both increased by 14%. Pyrolysis and combustion of wood sawdust and its hydrochar were performed by thermogravimetric analysis at 10, 20, 30, and 40°C/min. Kissinger–Akahira–Sunose (KAS) method, Friedman method, Flynn–Wall–Ozawa (FWO) method, and Kissinger method were used for analyzing the pyrolysis data. For combustion, only KAS and FWO methods were used to determine the kinetic parameters. As compared to wood sawdust pyrolysis, average activation energy of hydrochar pyrolysis was lower (150.36 kJ/mol by using KAS method, 153.05 kJ/mol by using FWO method). Based on mean activation energies, pyrolysis reaction of hydrochar was more favorable than its combustion. In combustion, average activation energy of hydrochar combustion reaction was higher; indicating that combustion of wood sawdust was more favorable.

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Section: Resultsmentioning

confidence: 99%

Section: T Eamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Pyrolysis and combustion characteristics and kinetics of wood sawdust and wood sawdust hydrochar

Kabakcı

2019

Env Prog and Sustain Energy

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“…It has also been found that binders may not have to be used if the materials themselves provide the necessary binding properties (Yaman, ). Even the materials’ existing moisture might act as a binder (Wu, Zhang, Wang, Mu, & Huang, ; Yaman et al., ). Inorganic substances can also provide binding (Paul et al., ).…”

Section: Pelletizing Of Mixtures Of Organic Materialsmentioning

confidence: 99%

A preliminary experimental feasibility case study of energy upgrade of pellets of lignite and plastic waste mixtures

Lasithiotakis

Zoumboulakis

Soulis

et al. 2019

Environmental Quality Mgmt

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The calorific value enhancement of lignite by briquetting with novolac resin and plastic wastes is discussed in this work. Mixtures of several types of lignite with novolac as binder, with or without polypropylene, were manufactured in the form of pellets by curing. Pellets were pyrolyzed at 300 • C and 500 • C, and weight losses were determined. Chemical transformations during curing were studied by Fourier-transform infrared spectroscopy, and the corresponding changes in the microstructure of the pellets were investigated by optical microscopy. Specimens of cured pellets were tested for their impact resistance index (IRI) and water resistance index (WRI).The incorporation of polypropylene in the pellets leads to an increase of IRI and a decrease of WRI. The calorific value was measured for both cured and pyrolyzed pellets. All pellets exhibit increased lower calorific value compared with raw lignite, indicating an upgrade of their energy content. K E Y W O R D Scuring, Fourier-transform infrared spectroscopy (FTIR), lignite, novolac, pellets, pyrolysis

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Microbial fuel cells—A preferred technology to prevail energy crisis

et al. 2021

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With ever increasing waste production worldwide, the development of newly emerging technologies is rising and advancing proportionately. Entailed instalment of sophisticated energy-producing plants is constantly expanding to meet the socio-economic demands of communities and industries. Innumerable superior technologies have been introduced to minimise waste pollution while reducing emissions of greenhouse gases hence, combatting the impact of global warming. This review shows energy conversion technologies including gasification, pyrolysis, incineration, landfill, and bioelectrochemical technologies mainly microbial fuel cell (MFC), microbial electrolysis cells (MECs) and microbial electrosynthesis (MES). Traditionally, incineration and landfill are the main mean of waste conversion but not favourable because of their side effects, economic viability, secondary pollution and difficulty in mechanical compression. Recently, biological processes including anaerobic digestion have gained huge interest but possess some inherent drawbacks and cannot provide a comprehensive solution for future waste management. Among energy converting technologies, bio-electrochemical MFC system is highly preferred as an elementary, clean, safe, economically viable and environmentally beneficial technology. MFC a renewable energy technology possesses multidimensional applications of producing electric power and treat wastewater. In addition, the MFCs can be modified into MEC to generate hydrogen energy from various organic matters. Prospective modification recommendations for scale-up application of this technology are also presented.

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High-strength charcoal briquette preparation from hydrothermal pretreated biomass wastes

Cited by 91 publications

References 47 publications

Pyrolysis and combustion characteristics and kinetics of wood sawdust and wood sawdust hydrochar

Pyrolysis and combustion characteristics and kinetics of wood sawdust and wood sawdust hydrochar

A preliminary experimental feasibility case study of energy upgrade of pellets of lignite and plastic waste mixtures

Microbial fuel cells—A preferred technology to prevail energy crisis

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