Allothermal Gasification of Peat and Lignite by a Focused Light Flow

Зайцев, А. С.; Taburchinov, Roman I.; Ozerova, Irina P.; Pereira, Amaro Olímpio; Egorov, Roman I.

doi:10.3390/app10082640

Cited by 8 publications

(5 citation statements)

References 23 publications

(34 reference statements)

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“…Some studies show that peat can be upgraded thermally by various methods, i.e., torrefaction [18], pyrolysis [19], gasification [20], or hydrothermal carbonization [21]. Each process favors different input substrates, process conditions, and end products.…”

Section: Peat Thermal-upgrading Methodsmentioning

confidence: 99%

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Medical Peat Waste Upcycling to Carbonized Solid Fuel in the Torrefaction Process

2021

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Peat is the main type of peloid used in Polish cosmetic/healing spa facilities. Depending on treatment and origin, peat waste can be contaminated microbiologically, and as a result, it must be incinerated in medical waste incineration plants without energy recovery (local law). Such a situation leads to peat waste management costs increase. Therefore, in this work, we checked the possibility of peat waste upcycling to carbonized solid fuel (CSF) using torrefaction. Torrefaction is a thermal treatment process that removes microbiological contamination and improves the fuel properties of peat waste. In this work, the torrefaction conditions (temperature and time) on CSF quality were tested. Parallelly, peat decomposition kinetics using TGA and torrefaction kinetics with lifetime prediction using macro-TGA were determined. Furthermore, torrefaction theoretical mass and energy balance were determined. The results were compared with reference material (wood), and as a result, obtained data can be used to adjust currently used wood torrefaction technologies for peat torrefaction. The results show that torrefaction improves the high heating value of peat waste from 19.0 to 21.3 MJ × kg−1, peat main decomposition takes place at 200–550 °C following second reaction order (n = 2), with an activation energy of 33.34 kJ × mol−1, and pre-exponential factor of 4.40 × 10−1 s−1. Moreover, differential scanning calorimetry analysis revealed that peat torrefaction required slightly more energy than wood torrefaction, and macro-TGA showed that peat torrefaction has lower torrefaction constant reaction rates (k) than wood 1.05 × 10−5–3.15 × 10−5 vs. 1.43 × 10−5–7.25 × 10−5 s−1.

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Section: Peat Thermal-upgrading Methodsmentioning

confidence: 99%

“…Some studies show the prospect of thermal peat upgrading to fuels (gases or solids) using the overmentioned processes [18][19][20][21]28]. Nevertheless, none of them focus on medical/cosmetic peat waste particularly.…”

Section: Peat Thermal-upgrading Methodsmentioning

confidence: 99%

Medical Peat Waste Upcycling to Carbonized Solid Fuel in the Torrefaction Process

2021

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“…The pressure in the liquid supply duct was built up with a syringe pump (4) maintaining a constant flow rate of 80 mL/h. A coal particle (5) was held at the outlet of the nozzle (6) connected with copper tubes (7) to the vacuum pump (8) with a flow rate of 70 l/h. The vacuum pump generated a pressure of 5 Pa, sufficient to hold coal particles in place when they were hit by a droplet.…”

Section: Setup and Experimental Proceduresmentioning

confidence: 99%

“…It is a relevant task to optimize coal combustion to maintain minimal negative impact on the environment. Coal pyrolysis and gasification [8][9][10], as well as combustion in the form of slurries [11][12][13] are generally accepted as the most promising approaches to the corresponding tasks. The slurries in question are often referred to as coal-water slurries with or without petrochemicals.…”

Section: Introductionmentioning

confidence: 99%

Interaction between Droplets and Particles as Oil–Water Slurry Components

et al. 2022

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The characteristics of the collisions of droplets with the surfaces of particles and substrates of promising oil–water slurry components (oil, water and coal) were experimentally studied. Particles of coals of different ranks with significantly varying surface wettability were used. The following regimes of droplet–particle collisions were identified: agglomeration, stretching separation and stretching separation with child droplets. The main characteristics of resulting child droplets were calculated. Droplet–particle interaction regime maps in the B = f(We) coordinates were constructed. Equations to describe the boundaries of transitions between the droplet–particle interaction regimes (B = nWek) were obtained. The calculated approximation coefficients make it possible to predict threshold shifts in transition boundaries between the collision regimes for different fuel mixture components. Differences in the characteristics of secondary atomization of droplets interacting with particles were established. Guidelines were provided on applying the research findings to the development of technologies of composite liquid fuel droplet generation in combustion chambers with the separate injection of liquid and solid components, as well as technologies of secondary atomization of fuel droplets producing fine aerosol.

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“…За последние годы в мире наблюдается рост спроса на углеводородные топлива [1]. Динамика потребления энергоресурсов предполагает заметный рост добычи и использования ископаемых топлив, что всегда сопряжено с негативным влиянием газообразных выбросов на окружающую среду [2]. Также одним из негативных факторов является производство большого количества твердых отходов.…”

Section: Introductionunclassified

High-Temperature Conversion of Lignite and Rapeseed Oil Mixtures

Egorov¹,

Belonogov²

2023

Ugol'

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a ceramic brick was obtained on the basis of waste from the fuel and energy complex: waste of combustible shale -inter-shale clay used as a clay binder and ash-slag material used as a thinning agent and a burnout additive, without the use of natural traditional materials. the linear regression method was used to optimize the composition of ceramic masses and construct model graphs based on the physical and mechanical properties of bricks. the analysis of model graphs is useful both for clarifying the ranges of the state between experiments and for predicting results that were not included in the experiment.

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Allothermal Gasification of Peat and Lignite by a Focused Light Flow

Cited by 8 publications

References 23 publications

Medical Peat Waste Upcycling to Carbonized Solid Fuel in the Torrefaction Process

Medical Peat Waste Upcycling to Carbonized Solid Fuel in the Torrefaction Process

Interaction between Droplets and Particles as Oil–Water Slurry Components

High-Temperature Conversion of Lignite and Rapeseed Oil Mixtures

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