Effect of Ash Content on the Pyrolysis of Indian Origin Coal

Mishra, Priya Ranjan; Sahu, Rina; Chakravarty, Sanchita

doi:10.1007/s12666-021-02334-2

Cited by 4 publications

(2 citation statements)

References 24 publications

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“…The mineral composition of the ashes (Table 3) is known for its catalytic effect on pyrolysis (Mishra et al., 2021). In the present study, calcium was a more abundant metal in the ash of the composted and non‐composted biomasses (43%–50%).…”

Section: Resultsmentioning

confidence: 99%

Upgrade of bio‐oil produced from the sisal residue composting

Cunha,

Lima,

Pires

2024

GCB Bioenergy

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The present work studies the composting effects on the chemical characteristics of bio‐oil produced by pyrolysis of sisal residue. Three systems were composted with sisal residue proportions to sisal fiber powder of 100:0, 90:10, and 75:25, respectively. The systems showed reductions of 33%–48% (extractive), 70%–80% (hemicellulose), and 80%–90% (cellulose) after composting. An increase in lignin content was observed in all systems. The pyrolysis of the composted systems was performed at 450°C and 550°C. At both temperatures, this process was selective in producing a large concentration of hydrocarbons (>160% increase), mainly alkanes and alkenes, reducing the concentrations of ketones, aldehydes, and phenolics (>50%) and eliminating esters, furans, and acetic acid to composted biomasses. The higher temperature favored aromatics and cyclic hydrocarbon production from the pyrolysis of composted samples. In addition to these results, composting helped reduce the oxygenated bio‐oil species by approximately 44%–75% at the lowest and ~69% at the highest temperatures. These results indicate that composted sisal residue can produce bio‐oils that are more suitable for biorefineries since they are rich in aliphatic hydrocarbons and non‐oxygenated species.

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Section: Resultsmentioning

confidence: 99%

Upgrade of bio‐oil produced from the sisal residue composting

Cunha,

Lima,

Pires

2024

GCB Bioenergy

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“…Tetsuya Fukuoka et al analyzed the solid chemical structure and gaseous distribution of coal under two same pyrolysis conditions, which supplemented the coal pyrolysis (CP) mechanism. Mishra et al , revealed the evolution path of coal structure pyrolysis reaction at different temperatures and thus proposed the devolatilization mechanism of chemical structure evolution in coal high temperature pyrolysis reaction. Some researchers analyze the characteristics and mechanism of CP through multi-scale simulation, so as to realize the sustainable development of coal industry.…”

Section: Introductionmentioning

confidence: 99%

Study on Combustion Kinetic Characteristics of Lignite and Semi-coking Dust

Sha

2022

ACS Omega

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In order to master the combustion kinetic characteristics of semi-coking dust in the early pyrolysis stage of lignite combustion explosion, a vacuum tube furnace was used to prepare semi-coking dust with different pyrolysis degrees, and the experimental samples were studied by a synchronous differential thermal analyzer. By means of theoretical analysis, the reaction mechanism of lignite and semi-coking dust was revealed. The results show that when the final pyrolysis temperature rises to 920 °C, the percentage of volatile matter decreases by 94.6%. The reaction in this process also causes the original pores to be cross-linked and collapsed, and a large number of new pores are generated, and the original pore structure is significantly enlarged. With the increase of the final temperature of pyrolysis, the ignition temperature ( T b ) of the dust increased from 354 to 455 °C, the fastest reaction temperature ( T c ) increased from 399 to 495 °C, and the ember temperature ( T d ) increased from 558 to 658 °C. The maximum combustion rate decreased by 65.97%, and the average combustion rate decreased by 84.67%. The apparent activation energy increased by 4.7 times from 45.219 to 257.665 kJ/mol, and the combustion kinetics of semi-coke became worse. The thermal reaction of lignite and semi-coking dust conforms to the diffusion mechanism of the three-dimensional spherical symmetry model. The research results provide a new idea for discussing the mechanism of coal dust explosion and the development of explosion suppression technology.

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