Effect of the mechanochemical activation for the extraction of diterpenes from the brown coal

Zubrik, Anton; Turcaniova, L.; Ježová, Věra; Čuvanová, S.; Skybová, M.

doi:10.1016/j.jallcom.2006.08.299

Cited by 12 publications

(5 citation statements)

References 17 publications

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“…Related ONCs detected from peat and coal derivatives are pyridines, anilines, quinolines, carbazoles, acridinones, and quinazoline. − However, to our knowledge, no reports were issued on the detection of the ONCs from coal extracts and the detection of other type of ONCs, i.e., isocyanobenzene, nitrobenzene, hexahydroazocines, methenamine, quinoline, dihydroisocarbostyils, thebendinones, and alkenamides, from either coal extracts and coal derivatives, except for recent investigations by our group. − …”

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confidence: 99%

Extraction of Organonitrogen Compounds from Five Chinese Coals with Methanol^#

Wei¹,

Wang²,

Zong³

2009

Energy Fuels

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mentioning

confidence: 99%

Extraction of Organonitrogen Compounds from Five Chinese Coals with Methanol^#

Wei¹,

Wang²,

Zong³

2009

Energy Fuels

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“…Moreover, is it known that wet grinding in a DSE (especially the high shearing stress) led to mechanical activation of the raw materials, combined with dissolution and colloidal dispersion of soluble components (e.g., humid acid and/or proteins) out of the material. , This type of mechanochemical activation of solid materials can also be performed using mills . When using lignite coal in this process, the amount of extractives can be increased through mechanochemical treatment and humic acids can be activated . The compression of the loose, wet material in the press channel of the pellet press led to the formation of liquid bridges and interlocking bonds between fibers and particles .…”

Section: Resultsmentioning

confidence: 99%

“…30,31 This type of mechanochemical activation of solid materials can also be performed using mills. 32 When using lignite coal in this process, the amount of extractives can be increased through mechanochemical treatment 33 and humic acids can be activated. 34 The compression of the loose, wet material in the press channel of the pellet press led to the formation of liquid bridges and interlocking bonds between fibers and particles.…”

Section: ' Materials and Methodsmentioning

confidence: 99%

Effect of Process Variables on the Quality Characteristics of Pelleted Wood–Xylite Mixtures

et al. 2011

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Xylite is a byproduct of lignite coal production in Germany and, up to now, has normally been used as an additive for potting-soil production. Another possibility to use the residual xylite, however, is to produce fuel pellets out of it. These pellets can be used like wood pellets in domestic and industrial firing systems. Using a novel process based on wet grinding, agglomeration of the wet xylite, and subsequent drying of the raw xylite pellets, it is possible to convert xylite into high-quality fuel pellets without being dependent upon the mechanics of lignin softening. An important aspect for fuel pellets is their CO 2 emissions. This is especially important for xylite, because it is ranked among the fossil fuels. In this work, xylite is mixed with CO 2 -neutral wood to produce composite pellets out of xylite and wood with reduced CO 2 emissions. The topic of this study is the production of composite pellets, which have been produced using the mentioned novel pelleting process under variation of four parameters: wood content, moisture content, material temperature, and binder content. The interaction of these four parameters has been investigated using the design of experiments (DOE) methods. Models could be derived for different pellet quality parameters (i.e., pellet abrasion resistance), which describe the effects and interactions of the four parameters. Evaluation of the significant parameters for pellet qualities was carried out with statistical tests and graphical analysis. It became evident that, in the wet-pelleting process, the moisture content of the raw material and the mass fraction of wood are of great relevance for pellet quality. In contrast, the temperature of the material has no significant effect. The addition of potato starch as a binder results in a steady increase in pellet quality across the entire study.

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“…Mechanochemistry can also be applied in many fields of material sciences (e.g., extractive metallurgy, crystal engineering, materials engineering, coal industry, building industry, agriculture, pharmacy, and waste treatment) [21]. The mechanical activation of coal affects the organic structure of the coal [22,23]. The mechanical deformation of the organic structure by activation grinding has been associated with new surface areas, solid-state defects, amorphisation, and metastability, which greatly affect and substantially increase chemical reactivity.…”

Section: Introductionmentioning

confidence: 99%

Mechanochemically Synthesised Coal-Based Magnetic Carbon Composites for Removing As(V) and Cd(II) from Aqueous Solutions

et al. 2019

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The continued decrease in water quality requires new advances in the treatment of wastewater, including the preparation of novel, effective, environmentally friendly, and affordable sorbents of toxic pollutants. We introduce a simple non-conventional mechanochemical synthesis of magnetically responsive materials. Magnetic lignite and magnetic char were prepared by high-energy ball co-milling from either raw Slovak lignite or coal-based char together with a ferrofluid. The products were characterised by X-ray diffraction, electron microscopy, 57Fe Mössbauer spectroscopy, X-ray photoelectron spectroscopy (XPS), volumetric magnetic susceptibility, and low-temperature nitrogen adsorption, and both magnetic carbons were comparatively tested as potential sorbents of As(V) oxyanions and Cd(II) cations in aqueous solutions. The magnetic char was an excellent sorbent of As(V) oxyanions (Qm = 19.9 mg/g at pH 3.9), whereas the magnetic lignite was less effective. The different sorption properties towards arsenic anions may have been due to different oxidation states of iron on the surfaces of the two magnetic composites (determined by XPS), although the overall state of iron monitored by Mössbauer spectroscopy was similar for both samples. Both magnetic composites were effective sorbents for removing Cd(II) cations (Qm (magnetic lignite) = 70.4 mg/g at pH 6.5; Qm (magnetic char) = 58.8 mg/g at pH 6.8).

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Effect of the mechanochemical activation for the extraction of diterpenes from the brown coal

Cited by 12 publications

References 17 publications

Extraction of Organonitrogen Compounds from Five Chinese Coals with Methanol^#

Extraction of Organonitrogen Compounds from Five Chinese Coals with Methanol^#

Effect of Process Variables on the Quality Characteristics of Pelleted Wood–Xylite Mixtures

Mechanochemically Synthesised Coal-Based Magnetic Carbon Composites for Removing As(V) and Cd(II) from Aqueous Solutions

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Effect of the mechanochemical activation for the extraction of diterpenes from the brown coal

Cited by 12 publications

References 17 publications

Extraction of Organonitrogen Compounds from Five Chinese Coals with Methanol#

Extraction of Organonitrogen Compounds from Five Chinese Coals with Methanol#

Effect of Process Variables on the Quality Characteristics of Pelleted Wood–Xylite Mixtures

Mechanochemically Synthesised Coal-Based Magnetic Carbon Composites for Removing As(V) and Cd(II) from Aqueous Solutions

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Product

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Extraction of Organonitrogen Compounds from Five Chinese Coals with Methanol^#

Extraction of Organonitrogen Compounds from Five Chinese Coals with Methanol^#