Phase characteristics and geological significance of coal-generated hydrocarbon: Take the Minhe Basin as an example

Fu, Deliang; Zhou, Shengyang; Xu, Guoce; Tian, Tao; Ma, Yu

doi:10.1177/0144598718823956

Cited by 2 publications

(2 citation statements)

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“…Previous hydrocarbon-generation kinetics research on Jurassic coal from the Minhe Basin shows that the mean values of the activation energies of CH 4 and C 1-5 are 64.55 kcal/mol and 63.93 kcal/mol, respectively, with a frequency factor of 1.0 9 10 14 s -1 (Fu et al 2019b). However, the stage evolution characteristics of gas generation have not been studied.…”

Section: Introductionmentioning

confidence: 99%

Gas generation from coal: taking Jurassic coal in the Minhe Basin as an example

Ma³

et al. 2020

Int J Coal Sci Technol

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The gas generation features of coals at different maturities were studied by the anhydrous pyrolysis of Jurassic coal from the Minhe Basin in sealed gold tubes at 50 MPa. The gas component yields (C 1 , C 2 , C 3 , i-C 4 , n-C 4 , i-C 5 , n-C 5 , and CO 2); the d 13 C of C 1 , C 2 , C 3 , and CO 2 ; and the mass of the liquid hydrocarbons (C 6?) were measured. On the basis of these data, the stage changes of d 13 C 1 , d 13 C 2 , d 13 C 3 , and d 13 CO 2 were calculated. The diagrams of d 13 C 1-d 13 C 2 vs ln (C 1 / C 2) and d 13 C 2-d 13 C 1 vs d 13 C 3-d 13 C 2 were used to evaluate the gas generation features of the coal maturity stages. At the high maturity evolution stage (T [ 527.6°C at 2°C/h), the stage change of d 13 C 1 and the CH 4 yield are much higher than that of CO 2 , suggesting that high maturity coal could still generate methane. When T \ 455°C, CO 2 is generated by breaking bonds between carbons and heteroatoms. The reaction between different sources of coke and water may be the reason for the complicated stage change in d 13 C CO 2 when the temperature was higher than 455°C. With increasing pyrolysis temperature, d 13 C 1-d 13 C 2 vs ln (C 1 /C 2) has four evolution stages corresponding to the early stage of breaking bonds between carbon and hetero atoms, the later stage of breaking bonds between carbon and hetero atoms, the cracking of C 6? and coal demethylation, and the cracking of C 2-5. The d 13 C 2-d 13 C 1 vs d 13 C 3-d 13 C 2 has three evolution stages corresponding to the breaking bonds between carbon and hetero atoms, demethylation and cracking of C 6? , and cracking of C 2-5 .

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Section: Introductionmentioning

confidence: 99%

Gas generation from coal: taking Jurassic coal in the Minhe Basin as an example

Ma³

et al. 2020

Int J Coal Sci Technol

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“…Based on the layered structure of Kln, appropriate organic molecules were inserted in interlayers to form the intercalation complexes (Cheng et al, 2015a), which maintain the original crystal structure and the unique adsorbability of clay minerals. The adsorbing properties of intercalation complexes have attracted wide interest, with most attention paid to montmorillonite as the carrier (Dahe et al, 2006; Deliang et al, 2019; Huang et al, 2020; Nesic et al, 2012). In addition, methane adsorption by porous adsorbents is important for the transportation of natural gas as well as the search for promising adsorbents for vehicular applications.…”

Section: Introductionmentioning

confidence: 99%

Investigation of methane adsorption in kaolinite–methanol intercalation complex interlayer by Monte Carlo simulations

Zhu,

Song,

Liu

et al. 2023

Energy Exploration & Exploitation

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The methane adsorption at room temperature in the interlayer of the kaolinite–methanol complex (Kln–Me) with different methanol content is investigated with grand canonical Monte Carlo (GCMC) simulation. The mechanism and structure of methanol intercalated kaolinite (Kln) is proposed, and the effect of methanol on methane adsorption by Kln–Me is discussed. The results indicate that the methanol adsorption in the Kln interlayer is mostly physical with non-bonded energy. The interlayer spacing ( d) of Kln–Me optimized by the DREIDING force field is in good agreement with the experimental data measured with X-ray diffraction. The configuration, adsorption properties, and adsorption isotherms are obtained for eight Kln–Me systems with different number (2–20) of methanol molecules in interlayer space. By comparing methane adsorption in the Kln–Me interlayer with different number of methanol molecules, we discover the complex interplay of factors influencing methane adsorption in the Kln–Me interlayer, especially the number of methanol molecules and free volume. It is found that the adsorption capacity of Kln can be enhanced by inserting methanol molecules into its interlayer. This analysis also underscores the GCMC simulation as a viable tool to calculate kaolinite/organic intercalation composites for potential applications.

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Phase characteristics and geological significance of coal-generated hydrocarbon: Take the Minhe Basin as an example

Cited by 2 publications

References 36 publications

Gas generation from coal: taking Jurassic coal in the Minhe Basin as an example

Gas generation from coal: taking Jurassic coal in the Minhe Basin as an example

Investigation of methane adsorption in kaolinite–methanol intercalation complex interlayer by Monte Carlo simulations

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