Bituminous coal extraction in terms of electron-donor and -acceptor interactions in the solvent/coal system

Marzec, Anna; Juzwa, Maria; Betlej, K.; Sobkowiak, Maria

doi:10.1016/0378-3820(79)90029-8

Cited by 115 publications

(46 citation statements)

References 5 publications

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“…From inspection of Equation 16 it is evident that viscosity hinders the growth of cells in melts, but aids in the melt stability. As is seen in Equations 10, 13, and 18, temperature also influences the nucleation and diffusion of cells through the exponential term.…”

Section: Pitch Foam Resultsmentioning

confidence: 99%

“…16 This model assumes that donoracceptor bonds in coal are responsible for binding together the macromolecular network and the extractable carbonaceous materials that fill the pores of the network. 17 According to this model, "Extraction is in principle, a substitution reaction: pore substances are replaced by a solvent molecule in their Donor network à Acceptor pore substance or Donor pore substance à Acceptor network bonds that bind together structural elements of an original coal."…”

Section: Coal Dissolution Via Nmpmentioning

confidence: 99%

“…17 According to this model, "Extraction is in principle, a substitution reaction: pore substances are replaced by a solvent molecule in their Donor network à Acceptor pore substance or Donor pore substance à Acceptor network bonds that bind together structural elements of an original coal." 18 Solvent swelling of coal occurs when the physical dimensions of coal increase due to the presence of a solvent. Researchers study coal swelling to elucidate coal structure.…”

Section: Coal Dissolution Via Nmpmentioning

confidence: 99%

“…This result supported the "extraction is a substitution" mechanism proposed by Marzec. 41 It is hypothesized that, as the extractable material in the coal matrix became soluble (at and above 185 °C), extractable coal material was replaced with solvent. This sudden introduction of solvent into a coal matrix, which is hypothesized to now be more porous due to the removal of extractable material, may have caused the coal to swell much more quickly.…”

Section: Summary Of Coal Dissolution and Extractionmentioning

confidence: 99%

“…It appeared that the dissolution of bituminous coal in a super solvent does take place through a substitution mechanism. 42 There is opportunity for further research into super solvent and bituminous coal systems.…”

Section: Summary Of Coal Dissolution and Extractionmentioning

confidence: 99%

See 4 more Smart Citations

Development of Continuous Solvent Extraction Processes for Coal Derived Carbon Products

Dadyburjor¹,

Heavner²,

Katakdaunde³

et al. 2006

View full text Add to dashboard Cite

Section: Pitch Foam Resultsmentioning

confidence: 99%

Section: Coal Dissolution Via Nmpmentioning

confidence: 99%

Section: Coal Dissolution Via Nmpmentioning

confidence: 99%

Section: Summary Of Coal Dissolution and Extractionmentioning

confidence: 99%

Section: Summary Of Coal Dissolution and Extractionmentioning

confidence: 99%

See 3 more Smart Citations

Development of Continuous Solvent Extraction Processes for Coal Derived Carbon Products

Dadyburjor¹,

Heavner²,

Katakdaunde³

et al. 2006

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Controllable Doping of Transition‐Metal Dichalcogenides by Organic Solvents

Sun

Guo

et al. 2020

Adv Elect Materials

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Seeking controllable and efficient surface dopant molecules for transition‐metal dichalcogenides (TMDCs) is highly valuable for fully understanding TMDCs properties and their applications to relevant devices. The general doping effect of solvents on TMDCs are explored. By selecting suitable solvents with optimized relevant factors, controllable n‐doping of molybdenum disulfide (MoS2) is obtained on the same device with the sheet density of electrons increased from 2.3 × 1011 to 6.4 × 1012, 9.7 × 1012, and 1.6 × 1013 by use of dimethylsulfoxide, N,N‐dimethylformamide, and N‐methyl‐pyrrolidone (NMP), respectively. The doping principle is explained by charge‐donating characteristics of molecule and dipole interaction. After doping by NMP, the contact resistance is reduced by four times, and the on/off current ratio of fabricated top‐gated MoS2 transistors is increased by 3 orders of magnitude. This work can guide the selection of suitable solvents for effective doping of two‐dimensional materials and advance the development of precise controllable electronic and optoelectronic devices.

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A Sustainable Approach Using Nanocrystals Functionalized Green Alkanes as Efficient Antisolvents to Fabricate High‐Quality Perovskite Films

Jiang

Han

Gao

et al. 2023

Advanced Energy Materials

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To address the toxicity concern of extensively used chlorobenzene (CB) and toluene antisolvents, it is urgent to explore green and more efficient antisolvents. In this work, a general and highly reproducible methodology of employing CsPbI3 nanocrystals (NCs) functionalized green alkanes with ultralow‐polarity (Alkane/NCs) as antisolvents to fabricate high‐quality perovskite films is reported. Compared with the CB processed, the perovskite films with much improved quality and high‐orientation are achieved by the Alkane/NCs approach. NCs in the alkane antisolvents are proven to provide enough heterogeneous nuclei, solving effectively the discontinuous film problem encountered from using pure alkanes. Strikingly, the lattice anchoring effect of NCs accounts for the high‐orientation growth of the perovskite films as revealed directly by cryo‐electron microscopy (cryo‐EM). Moreover, the phase segregation that easily occur in the CB processed perovskite film is successfully suppressed by the Alkane/NCs method. The optimal device conversion efficiency is enhanced from 21.59% to 23.10% from CB to octane (OCT)/NCs. Impressively, the alkane/NCs processed perovskite films and their devices exhibit much improved stability over CB, with the conversion efficiency remaining at 94% of its initial value after 500 h light soaking for OCT/NCs device, while the CB device fails at around 100 h.

show abstract

Bituminous coal extraction in terms of electron-donor and -acceptor interactions in the solvent/coal system

Cited by 115 publications

References 5 publications

Development of Continuous Solvent Extraction Processes for Coal Derived Carbon Products

Development of Continuous Solvent Extraction Processes for Coal Derived Carbon Products

Controllable Doping of Transition‐Metal Dichalcogenides by Organic Solvents

A Sustainable Approach Using Nanocrystals Functionalized Green Alkanes as Efficient Antisolvents to Fabricate High‐Quality Perovskite Films

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