The evolution characteristics of bituminous coal in the process of pyrolysis at elevated pressure

Zhang, Wenda; Sun, Shaozeng; Zhu, Hanlin; Zhang, Linyao; Zhao, Yijun; Wang, Pengxiang

doi:10.1016/j.fuel.2021.120832

Cited by 34 publications

(5 citation statements)

References 49 publications

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“…In the 21st century, the development of missiles, aviation, and aerospace technology requires solid propellant to meet more complex standards and further promote its development [1–4] . The burn rate is one of the most important technical parameters for evaluating the flammability of solid composite propellants, [5] and the use of burn rate catalysts (BRCs) has been proven to be one of the most effective ways to change the burn rate; [6] various BRCs have been reported, such as transition metal oxides, metal complexes, carbon black‐related compounds, nanomaterials, and ferrocene‐based derivatives [7] . Among these BRCs, ferrocene derivatives are characterized by their inherent thermal stability, aromaticity, low toxicity, lipophilicity and efficient burn rate catalytic activity; these and other advantages have attracted much attention [8,9] .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and properties of binuclear ferrocene energetic compounds as combustion rate catalyst

Zhao

Hou

et al. 2022

Zeitschrift anorg allge chemie

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In order to improve the catalytic performance, oxidation resistance and thermal stability of neutral alkyl ferrocene-based combustion rate catalysts, mononuclear ferrocene energetic compounds were designed and prepared, but four binuclear ferrocene energetic compounds were unexpectedly discovered during the synthesis compounds. The new compounds were characterized by single-crystal X-ray diffraction, 1 H and 13 C nuclear magnetic resonance spectroscopy, and high-resolution mass spectrometry. The crystal structures of compounds a, b, c and d confirmed that we have successfully prepared binuclear ferrocene nitrogen-containing heterocyclic compounds. The thermogravimetric results revealed that most of the compounds exhibit high thermal stability. The electrochemical properties of the four compounds were examined by cyclic voltammetry (CV) and differential pulse voltammetry; the CV experimental results indicated that these compounds showed good electrochemical performance, which contributed to their burning rate catalytic activity in composite solid propellants. Differential scanning calorimetry was used to study the catalytic performance of the binuclear ferrocene energetic compounds for ammonium perchlorate (AP). The results show that these compounds have a good combustion catalytic effect on AP due to the increase in the number of ferrocene groups.

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Section: Introductionmentioning

confidence: 99%

Synthesis and properties of binuclear ferrocene energetic compounds as combustion rate catalyst

Zhao

Hou

et al. 2022

Zeitschrift anorg allge chemie

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“…It is shown that CH 4 is mainly derived from the cleavage of methoxy, alkyl side chains, and aryl methyl groups at low- and medium-temperature pyrolysis (<700 °C). 30 , 31 Most importantly, it was found that pyrolysis pressure greatly favored the formation of CH 4 . 32 Our previous research shows that the pressure promoted the generation of CH 4 from the oxy-quaternary carbon chain as the active site in the aliphatic group.…”

Section: Resultsmentioning

confidence: 99%

Effects of Pressurized Pyrolysis on the Chemical and Porous Structure Evolution of Coal Core during Deep Underground Coal Gasification

Niu,

Xin,

Cheng

et al. 2023

ACS Omega

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During deep underground coal gasification, the semicoke produced by the pyrolysis of dense coal cores is an important material for its gasification and combustion. In this paper, pressurized pyrolysis experiments were carried out on dense coal cores at 700 °C and pressures of 1, 2, and 3 MPa using a shaft furnace. The resulting semicoke and raw coal were analyzed using the characterization methods such as the N2 isothermal adsorption/desorption and scanning electron microscopy, Fourier transform infrared spectrometry (FTIR), and a pressurized thermogravimetric analyzer coupled with a FTIR spectrometer. The pyrolysis gas generation characteristics during pressurized pyrolysis were studied. The mechanisms of evolution of aliphatic functional groups and pore structures in semicoke during pressurized pyrolysis were revealed. The results indicate that the increase in pressure obviously changed the gas composition, most notably, the relative content of CH4 and H2 in the pyrolysis gas. The methane in the pyrolysis gas during pressurized pyrolysis of dense coal cores is mainly from the secondary reaction. As the pyrolysis pressure increased, the ratio of –CH2–/–CH3 became smaller, indicating that the pressure promoted the breakage of the long fat chains. With the increase of the pyrolysis pressure, the surface deformation of pressurized pyrolysis semicoke increases, and the pore structure becomes more abundant.

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“…76 In the literature, the C/H ratio of WTPO in general is higher than that of biodiesel. 23,[77][78][79] The main reason for the lower C/H ratio is the addition of biodiesel. It causes a decrease in the C/H ratio of test fuels, resulting in lower CO 2 emission.…”

Section: Brake-specic Fuel Consumptionmentioning

confidence: 99%

Gradient boosting machine for performance and emission investigation of diesel engine fueled with pyrolytic oil–biodiesel and 2-EHN additive

Okumuş

Sönmez

Kaya

et al. 2023

Sustainable Energy Fuels

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The evolution characteristics of bituminous coal in the process of pyrolysis at elevated pressure

Cited by 34 publications

References 49 publications

Synthesis and properties of binuclear ferrocene energetic compounds as combustion rate catalyst

Synthesis and properties of binuclear ferrocene energetic compounds as combustion rate catalyst

Effects of Pressurized Pyrolysis on the Chemical and Porous Structure Evolution of Coal Core during Deep Underground Coal Gasification

Gradient boosting machine for performance and emission investigation of diesel engine fueled with pyrolytic oil–biodiesel and 2-EHN additive

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