Physicochemical Transformations of Mixed Fuels Based on Typical Coals and Wood upon Heating

Yankovsky, S. A.; Кузнецов, Г. В.

doi:10.3103/s0361521919010087

Cited by 12 publications

(5 citation statements)

References 15 publications

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“…The hypothesis [35] was confirmed by experimental data [36] on the composition of T-grade coal ash after its pyrolysis together with wood biomass. It was found [36] that concentrations of aluminum and calcium sulfates in the ash remaining after pyrolysis of a mixture of T-grade coal with pine sawdust are 1.7 times and 2.5 times, respectively, higher than in the ash of homogeneous coal after its pyrolysis.…”

Section: Introductionmentioning

confidence: 65%

“…A hypothesis was put forward in [35] about the mechanism of chemical reaction processes between gaseous and solid products of pyrolysis of coal and wood: "Water vapor released during high-temperature heating of biomass interacts with sulfur oxides (products of coal pyrolysis). As a result, sulfuric acid vapors are formed, which interact with the solid products of coal pyrolysis (metal oxides) to eventually form aluminum and calcium sulfates and other metals that remain in the non-volatile ash.…”

Section: Introductionmentioning

confidence: 99%

“…As a result, sulfuric acid vapors are formed, which interact with the solid products of coal pyrolysis (metal oxides) to eventually form aluminum and calcium sulfates and other metals that remain in the non-volatile ash. The intensity of the sequestration of sulfur and nitrogen oxides under these conditions depends on the moisture content in the biomass (and coal) and on the concentration of metal oxides in the thermal decomposition products of coal" [35].…”

Section: Introductionmentioning

confidence: 99%

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On the Effect of the Distances between Coal and Wood Particles during Their Joint Pyrolysis on Sulfur Oxides Formation

et al. 2021

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The simultaneous pyrolysis of coal with wood was experimentally found to allow reducing concentrations of sulfur-containing substances in gases released. The objective of experimental studies is comparison of the sulphate of calcium and aluminum in the ash of coal-wood mixtures after pyrolysis of the latter in a dense “packing” of aggregate particles of these two fuels and at a few millimeters distance between particles. The 3B-grade lignite, T-grade bituminous coal and pinewood sawmill waste were chosen as feedstocks for pyrolysis experiments because they are widespread in Russia as well as many other countries. The elemental composition of all raw materials and pyrolysis residues was determined. The inorganic composition of obtained pyrolysis product in the solid phase was characterized by X-ray analysis. The content of aluminum and calcium sulfate in residue in case of simultaneous processing of coal with wood was found to be higher, compared to the processing of coal only (within the random errors of the experiment), than those established for such mixtures under conditions of dense “packing” of large masses (up to 15 g).

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Section: Introductionmentioning

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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On the Effect of the Distances between Coal and Wood Particles during Their Joint Pyrolysis on Sulfur Oxides Formation

et al. 2021

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“…Сжигание отходов переработки деловой древесины в энергетических целях само по себе неэффективное мероприятие, а ее глубоко переработанные продукты или сама древесина как добавка к основному энергетическому топливу -достаточно перспективное направление в энергетике. Применение биомассы как экологически эффективной и инициирующей добавки в смеси с углем на ТЭС может привести к существенному снижению выбросов диоксида серы в ды-мовых газах [7], что впоследствии позволит снизить формирование кислотных дождей, дефолиацию древесных растений и сохранить леса.…”

Section: Abstract: Coal Wood Nozzle Atomization Combustion Chamberunclassified

Investigation of Composite Fuel Spraying Characteristics

Yankovskiy¹,

Misyukova²

2022

IJAFR (МЖПФИ)

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Приведены результаты экспериментальных исследований процессов распыления смесевых топлив, сформированных на основе каменного угля марки Т (Тощий) в смеси с отходами лесопиления (опилки в основном сосновых пород древесины). Произведено сравнение угла раскрытия струи при давлении 1 бар и 2 бара. Распыление смесевого топлива проводилось при среднем размере частиц угля и древесины менее 200 мкм. Формирование смесевых топлив осуществлялось в шаровой барабанной мельнице с мелющими телами в разных концентрационных соотношениях угля и древесины (90/10 %, 75/25 %, 50/50 %). Установлено, что наиболее эффективно процесс распыления происходит при давлении подающей струи воздуха, равном 2 бара. Угол раскрытия факела при увеличении древесной компоненты в смеси на 25 % остается таким же, как при распылении однородного угля. При увеличении доли древесной компоненты до 50 % угол раскрытия факела увеличивается на 0,5 % по сравнению с углом раскрытия струи однородного угля. Увеличение угла раскрытия факела приводит к наиболее равномерному распределению частиц смесевого топлива в потоке, что впоследствии приведет к более равномерному сжиганию таких топлив в топках энергетических котлов.

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“…The interest in a profitable and sustainable utilization of solid and semi-solid refinery products has risen over the last decade in spite of the advent of renewable sources and the decreasing appeal of fossil fuels [2,3]. Bitumen is utilized preferably as construction material, especially in road paving, and secondly as fuel.…”

Section: Introductionmentioning

confidence: 99%

Analytics for Recovery and Reuse of Solid Wastes from Refineries

Apicella¹,

Russo²,

Senneca³

2022

Energies

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Heavy fractions of petroleum have for long time been bypassed in favour of lighter fractions. Nowadays, in the framework of the “circular economy”, there is a growing interest in residual petroleum heavy fractions. The present work briefly reviews the use and characterization at laboratory scale of some low valuable solid or semi-solid products of the oil refinery industry: asphaltenes (bitumen/asphalt), pet-coke and pitch for use as fuels. The use of solid and semi-solid refinery residues, in particular, of coke as a coal substitute in thermochemical processes and of pitch and asphaltenes as material precursors, requires careful analysis, and an understanding of their structure at the molecular level is mandatory for the development of processing technology. Techniques for the characterization of typical petroleum heavy fractions such as pitches, asphaltenes and cokes are reviewed. An experimental protocol for investigating at the laboratory scale the thermochemical conversion behavior of solid and semi-solid refinery wastes is proposed.

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Physicochemical Transformations of Mixed Fuels Based on Typical Coals and Wood upon Heating

Cited by 12 publications

References 15 publications

On the Effect of the Distances between Coal and Wood Particles during Their Joint Pyrolysis on Sulfur Oxides Formation

On the Effect of the Distances between Coal and Wood Particles during Their Joint Pyrolysis on Sulfur Oxides Formation

Investigation of Composite Fuel Spraying Characteristics

Analytics for Recovery and Reuse of Solid Wastes from Refineries

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