Pyrolysis behaviors of two coal-related model compounds on a fixed-bed reactor

Kong, Lingqian; Li, Gang; Jin, Lijun; Hu, Haoquan

doi:10.1016/j.fuproc.2014.09.009

Cited by 47 publications

(14 citation statements)

References 30 publications

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“…The detailed pyrolysis pathways of BOB had been discussed in our previous study [23]. The initial steps of BOB pyrolysis include three kinds of bond dissociation C aliphatic O, C aryl O, and ( O )C aliphatic C aryl , probably resulting in five radicals.…”

Section: The Pyrolysis Pathways Analysis Of Bobmentioning

confidence: 99%

“…Phenyl ethyl ether (PEE) and benzyloxybenzene (BOB) are the other two frequently selected ether model compounds, whose structures are similar to the anisole that has the typical O C aliphatic bond. The pyrolysis behaviors of PEE and BOB have also been studied in detail [1,[19][20][21][22][23][24][25]. The above literature reviews show that the O C aliphatic bond dissociation, which leads to two radicals, is the initial step for all the above selected ether model compounds.…”

Section: Introductionmentioning

confidence: 99%

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Effects of the oxygen substituent on the pyrolysis of phenyl ethers on a fixed-bed reactor

Kong

Jin

et al. 2015

Journal of Analytical and Applied Pyrolysis

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Section: The Pyrolysis Pathways Analysis Of Bobmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of the oxygen substituent on the pyrolysis of phenyl ethers on a fixed-bed reactor

Kong

Jin

et al. 2015

Journal of Analytical and Applied Pyrolysis

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“…Due to its high reactivity, lignite can be decomposed at relatively lower temperatures than other coal . The LT‐LP process is regarded as a key step to upgrade lignite and produce high‐valued tar . However, in addition to a small amount of light organic liquid the resulting tar product contains a mass of heavy components.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of low‐temperature lignite pyrolysis by recycled carbocoal for high‐quality tar in fixed‐bed reactor

2019

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Lignite could be converted to high value‐added char and tar through a pyrolysis process. To improve the tar yield as well as the quality of tar/char during a low temperature (550 °C) lignite pyrolysis (LT‐LP) process, the influence of mixing inexpensive and accessible recycled carbocoal with three kinds of lignite was investigated in a fixed‐bed reactor. The LT‐LP processes with and without recycled carbocoal were investigated using a TGA and were compared in detail. The results indicated that the addition of the recycled carbocoal into the three lignite optimized the light tar yield from 4.63, 3.33, and 2.09 g/g to 10.50, 6.10, and 5.01 g/g, and improved the gasification reactivity of the chars up to 2.88, 2.58, and 2.88 h−1, respectively. To identify the role of recycled carbocoal during the LT‐LP process, the obtained products, such as tar and char, were characterized by chromatography, thermal gravimetric analyzer, chromatograph‐mass spectrometer, elemental analyzer, Fourier transform infrared spectroscopy, and scanning electron microscope. It was demonstrated that the existence of the recycled carbocoal could impede the self‐polymerization of small molecule hydrogen‐containing (SM‐HC) free radicals and cut down the reactions between SM‐HC and hydroxyl radicals at the weak‐bonds breaking zone (300–450 °C), thereby supplying sufficient free radical stabilizers for the tar intermediates at the molecular skeleton region (450–550 °C). The high‐valued tar and char were obtained. In summary, the employment of recycled carbocoal during the LT‐LP process could not only promote the economic benefit of LT‐LP products but also reduce the cost of lignite value‐added utilization.

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“…Therefore, in‐depth understanding of the collision‐induced dissociation (CID) fragmentation pathways of ionized coal molecules is necessary for acquiring the structural details of coal molecules . Coal‐related model compounds (CRMCs) can avoid co‐elution during analysis and play an important role as substitutes for coal to understand the reactivity of coal under various conditions . Elucidation of the ionization mechanisms of CRMCs in the ion source and the corresponding fragmentation pathways at the collision cell can be further applied for explaining the structural information for products of coal conversions.…”

Section: Introductionmentioning

confidence: 99%