Synthesis of carbon-based materials by microwave-assisted hydrothermal process

Guiotoku, Marcela; Rambo, Carlos R.; Maia, C. M. B. de F.; Hotza, Dachamir

doi:10.5772/20089

Cited by 11 publications

(7 citation statements)

References 46 publications

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“…Moreover, this hydrothermal technology offers the lowest reaction temperature as compared to other thermochemical conversion techniques. During the process, water (H 2 O) acts as a solvent, reactant, catalyst, and as a medium for both mass and energy transfer [61], where it will facilitate the hydrolysis, dehydration, decarboxylation and depolymerization process [62]. Besides, at temperature of 200-280°C, H 2 O that possesses similar behavior to mild acid and mild base at the same time results in an acceleration of biomass decomposition [61,63].…”

Section: Hydrothermal Carbonizationmentioning

confidence: 99%

A Mini Review of Biochar Synthesis, Characterization, and Related Standardization and Legislation

Rashidi¹,

Yusup²

2020

Applications of Biochar for Environmental Safety

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The abundance of biomass in Malaysia creates an avenue for growth of bio-economic sector through the research and development (R&D) activities on the biochar production. Biochar that is described as a carbonaceous material derived from the thermochemical process at temperature of usually lower than 700°C is promising due to its applicability in wider range of applications, such as in soil amendment (fertilizer) and as a low-cost adsorbent for the pollution remediation, apart from minimizing the solid waste disposal problems. Therefore, this chapter discusses the current trends on various production techniques of biochar from both the lignocellulosic (plantation based waste materials) and non-lignocellulosic sources, as well as the physiochemical characteristics of the resulting biochar. In addition, overview of the biochar industry in Malaysia is presented in this chapter. Lastly, recap of standardization and legislation particularly related to the biochar utilization as a soil amendment agent is included to grasp readers' attention prior to the large scale applications.

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Section: Hydrothermal Carbonizationmentioning

confidence: 99%

A Mini Review of Biochar Synthesis, Characterization, and Related Standardization and Legislation

Rashidi¹,

Yusup²

2020

Applications of Biochar for Environmental Safety

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“…The main requirement to effective influence of microwave irradiation on material is that the material should be dielectric and characterized with definite complex of dielectric properties (Danilov et al, 2010;Guiotoku et al, 2011). One of such materials is peat.…”

Section: Literature Reviewmentioning

confidence: 99%

Synthesis of Carbon-Base Materials by Microwave Irradiation of Peat

Kitaeva¹,

Bannova²

2015

MAS

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The production of carbon adsorbents by carbonization of peat under the effect of microwave irradiation within the environment of own gases was studied. The optimization of conditions and parameters for carbonization of peat was conducted. By means of FTIP-spectroscopy, elemental analysis, thermographic analysis, nitrogen sorption-desorption and model indicators' occlusion it was found that in consequence of carbonization the content of loaded surface sites is reduced due to the destruction of functional organic compounds, dispersion is decreased, adsorption properties of carbon-base materials are increased.

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“…There are several ways for synthesizing carbon-rich solid products from lignocellulosic biomass materials to convert waste into valuable products which may be used as an alternative solid fuel for energy applications. The conversion methods may be chemical, biological, physical or thermochemical (Guiotoku et al, 2011). Artificial coalification is one of such energy-efficient thermochemical conversion techniques in which feedstock is heated in a subcritical water environment at 180-250 °C under pressure to produce hydrochar (Lucian et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Effect of Hydrothermal Temperature on Sawdusthydrochar Production Produced Throughmicrowave-Assisted Artificial Coalification

KOMALABHARATHI¹,

SUBRAMANIAN²,

RAMESH³

et al. 2022

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A microwave mode of heating was utilized to produce sawdust hydrochar through the artificial coalification process. Hydrochar was synthesized at temperatures 180, 200 and 220 Â°C with a 1:10 solid to water ratio and residence time of 40 minutes. Hydrochar was characterized for proximate properties and energy quality. With the increase in the temperature from 180 to 220 Â°C, hydrochar yield decreased from 76.69 to 58.35 %. The volatile matter and ash content depicted a decreasing trend and the energy content of hydrochar showed an increasing trend with the increase in the process temperature. The ratio of energy densification of hydrochar was in the range of 1.04 to 1.26.

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Synthesis of carbon-based materials by microwave-assisted hydrothermal process

Cited by 11 publications

References 46 publications

A Mini Review of Biochar Synthesis, Characterization, and Related Standardization and Legislation

A Mini Review of Biochar Synthesis, Characterization, and Related Standardization and Legislation

Synthesis of Carbon-Base Materials by Microwave Irradiation of Peat

Effect of Hydrothermal Temperature on Sawdusthydrochar Production Produced Throughmicrowave-Assisted Artificial Coalification

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