Effects of different drying methods on the grinding characteristics of Ximeng lignite

Zhu, Jiachen; Liu, Jianzhong; Wu, Ji; Cheng, Jun; Wang, Zhihua; Zhou, Junhu; Cen, Kefa

doi:10.1016/j.fuel.2015.09.028

Cited by 18 publications

(3 citation statements)

References 29 publications

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“…Apart from the catalytic reactions, MW heating technology has been used in separation fields, involving drying, − extraction, − and demulsification. − In terms of product dryness, MW irradiation can selectively heat the water molecules in the matter and hence accelerate their escape. This heating mode can significantly reduce the reaction time and therefore overcome the problems ( e.g ., oxidation or loss of some volatile components) caused by long-term roasting occurring in traditional routes. , The selective heating behavior of water molecules has exhibited significant advantages in organic extraction, because the induced evaporation of water inside the cells can cause the rupture of biological tissue and cells and the accelerated discharge of bioactive compounds. , The rapid heating of the water phase by MWs can also be used to disturb the water–oil interface, which is conducive to the demulsification of a water-in-oil emulsion. This effect can help decrease the amount of toxic demulsifier in the field of crude oil treatment.…”

Section: Fundamentals Of Mail Techniquesmentioning

confidence: 99%

“…This heating mode can significantly reduce the reaction time and therefore overcome the problems (e.g., oxidation or loss of some volatile components) caused by long-term roasting occurring in traditional routes. 82,83 The selective heating behavior of water molecules has exhibited significant advantages in organic extraction, because the induced evaporation of water inside the cells can cause the rupture of biological tissue and cells and the accelerated discharge of bioactive compounds. 77,84 The rapid heating of the water phase by MWs can also be used to disturb the water−oil interface, which is conducive to the demulsification of a water-in-oil emulsion.…”

Section: Mw Induced Process Intensificationmentioning

confidence: 99%

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Microwave Encounters Ionic Liquid: Synergistic Mechanism, Synthesis and Emerging Applications

Zhao,

Li,

Gao

2023

Chem. Rev.

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Progress in microwave (MW) energy application technology has stimulated remarkable advances in manufacturing and high-quality applications of ionic liquids (ILs) that are generally used as novel media in chemical engineering. This Review focuses on an emerging technology via the combination of MW energy and the usage of ILs, termed microwave-assisted ionic liquid (MAIL) technology. In comparison to conventional routes that rely on heat transfer through media, the contactless and unique MW heating exploits the electromagnetic wave−ions interactions to deliver energy to IL molecules, accelerating the process of material synthesis, catalytic reactions, and so on. In addition to the inherent advantages of ILs, including outstanding solubility, and well-tuned thermophysical properties, MAIL technology has exhibited great potential in process intensification to meet the requirement of efficient, economic chemical production. Here we start with an introduction to principles of MW heating, highlighting fundamental mechanisms of MW induced process intensification based on ILs. Next, the synergies of MW energy and ILs employed in materials synthesis, as well as their merits, are documented. The emerging applications of MAIL technologies are summarized in the next sections, involving tumor therapy, organic catalysis, separations, and bioconversions. Finally, the current challenges and future opportunities of this emerging technology are discussed.

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Section: Fundamentals Of Mail Techniquesmentioning

confidence: 99%

Section: Mw Induced Process Intensificationmentioning

confidence: 99%

Microwave Encounters Ionic Liquid: Synergistic Mechanism, Synthesis and Emerging Applications

Zhao,

Li,

Gao

2023

Chem. Rev.

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“…High sulfur contents in coking coal severely restrict their applications in metallurgy, foundry, and chemical industries. − Besides, the emission of poisonous SO X gases due to the direct combustion of high-sulfur coal may accelerate air pollution and health risks. , Therefore, the removal of sulfur is of great significance for upgrading and utilizing the low-quality coking coal. Different from inorganic sulfur components, which can be readily removed using physical desulfurization methods, − organic sulfur compounds, coexisting with organic substances in coal, are more stubborn to removal or degradation. ,,,, Microwaves are widely used in the field of coal industry − and have recently attracted much attention for their applications to desulfurization of coal due to their high reaction efficiency and minimal coal structure damage. ,,,, …”

Section: Introductionmentioning

confidence: 99%

The Dielectric Properties of Thiophene Model Compounds: Insights for Microwave Desulfurization of Coking Coal

2020

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Microwave desulfurization capitalizes on the different dielectric properties of sulfur-containing and sulfur-free components in coal. However, the dielectric properties of thiophene compounds, the predominant sulfur species in coking coal, are not well understood. Herein, the dielectric properties of different thiophene model compounds containing coal-like compositions and structures are investigated under the impact of microwave frequency and temperature. The increases of aromaticity in thiophene compounds suppress their microwave responses to the electric irradiation, as indicated by the decrease of the loss tangent values, while thiophene compounds with polar functional groups exhibit higher microwave reactivity. Additionally, the oxidation of the functional groups in thiophene further increases the ability to absorb and convert the microwave energy to the thermal energy. The dielectric properties of thiophene compounds are also sensitive to the changes in microwave frequency and temperatures. The thiophene compounds exhibit a higher microwave adsorption capacity at the microwave frequency of 915 MHz relative to 2450 MHz, which is opposite to the trends for the penetration depths. Such an observation indicates that the desulfurization of thiophene compounds is more readily achieved at the frequency of 915 MHz. The findings associated with the dielectric properties of different thiophene compounds mark an important step toward optimizing the microwave desulfurization of coal.

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Future of lignite resources: a life cycle analysis

Wang

Liu

Yuan

et al. 2016

Environ Sci Pollut Res

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Lignite is a low-quality energy source which accounts for 13 % of China's coal reserves. It is imperative to improve the quality of lignite for large-scale utilization. To further explore and analyze the influence of various key processes on the environment and economic costs, a lignite drying and compression technology is evaluated using an integrated approach of life cycle assessment and life cycle costs. Results showed that lignite mining, direct air emissions, and electricity consumption have most significant impacts on the environment. An integrated evaluation of life cycle assessment and life cycle costs showed that the most significant contributor to the environmental impacts and economic costs was the lignite mining process. The impact of transportation and wastewater treatment process on the environment and economic costs was small enough to be ignored. Critical factors were identified for reducing the environmental and economic impacts of lignite drying and compression technology. These findings provide useful inputs for both industrial practice and policy making for exploitation, processing, and utilization of lignite resources.

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Effects of different drying methods on the grinding characteristics of Ximeng lignite

Cited by 18 publications

References 29 publications

Microwave Encounters Ionic Liquid: Synergistic Mechanism, Synthesis and Emerging Applications

Microwave Encounters Ionic Liquid: Synergistic Mechanism, Synthesis and Emerging Applications

The Dielectric Properties of Thiophene Model Compounds: Insights for Microwave Desulfurization of Coking Coal

Future of lignite resources: a life cycle analysis

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