Co-combustion of refuse plastic fuel from marine plastics with wood pellets in a fixed-bed: Identification of minimum cofiring ratio and ideal air flow rate

Park, Jong–Keun; Yu, Seunghan; Kim, Heeyoon; Jo, Hyunbin; Min, Kyongchon; Lee, Jaeha; Heo, Joon; Ryu, Changkook

doi:10.1016/j.fuel.2023.128092

Cited by 5 publications

(6 citation statements)

References 33 publications

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“…Lucerne had an ash content of 10.3% and the bark had an ash content of 8.6%. The values obtained in the present work were much lower than those of other vegetable residues: switchgrass 8.9%, corn stover 6.9%, garden waste 10% and peas peal 20% [12,13].…”

Section: Calorific Value Modeling Depending On the Ash And Carbon Con...contrasting

confidence: 71%

“…), but also the adaptation of pellet combustion to any type of heating furnace, fireplace or stove, with a suppling independence of at least 6-8 h. Among the many advantages of combustible lignocellulosic pellets, the following can be mentioned: they do not absorb moisture and humidity, they burn slowly, they do not emit harmful gases during combustion, they have an energetic efficiency 1.6-1.9 times higher than that of firewood, they do not contain chemicals or adhesives/additives, and they are environmentally friendly. As general characteristics, pellets obtained from sunflower seed husks can have a diameter of 8 mm, lengths between 10 and 30 mm, a moisture content of up to 10%, a calorific value over 18 MJ/kg and an ash content below 5% [9][10][11][12]. For comparison, the calorific values for other fuel products were centralized in Table 1.…”

Section: Introductionmentioning

confidence: 99%

“…Table 1. Comparative values of the calorific value of some combustible materials [8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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Pellets Obtained from the Husks of Sunflower Seeds and Beech Sawdust for Comparison

Lunguleasa,

Olarescu,

Spirchez

2024

Forests

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The energetic fossil resources of the world have decreased drastically in recent decades, and the quick and efficient solution to replace them is to use renewable biomass resources. This category also includes vegetable biomass, and within it, sunflower seed shells have an important contribution. The present work aimed to analyze the pellets obtained from the husks of sunflower seeds, as lignocellulosic biomass resulting from the production of edible oil, and for comparison, some pellets from beech sawdust were used. The main physical properties (such as moisture content, density, coefficient of densification, etc.), mechanical properties (such as shear strength) and calorific properties (high and low calorific value, calorific density, volatile content and ash content) were determined and statistically analyzed. As the main element of comparison of these types of pellets, the pellets obtained from beech sawdust were used. For the comparison of the pellets obtained from the husks of sunflower seeds, especially to observe their differences compared to the torrefied pellets, charcoal was chosen. The conclusions highlighted the fact that sunflower seed husks are an important source of biomass that can be used to obtain lignocellulosic pellets, and the torrefied pellets obtained from these husks are comparable with the energetic value of charcoal.

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Section: Calorific Value Modeling Depending On the Ash And Carbon Con...contrasting

confidence: 71%

Section: Introductionmentioning

confidence: 99%

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Pellets Obtained from the Husks of Sunflower Seeds and Beech Sawdust for Comparison

Lunguleasa,

Olarescu,

Spirchez

2024

Forests

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“…Another possibility for the optimisation of the burner operation with air gradation for combustion is changing the geometry of air supply channels in line with the burner optimisation method described earlier in this publication [33]. Gradation of the combustion air is also an essential process that should be carried out by a solid fuel boiler dedicated to domestic solutions (power not more than 50 kW) in the event of the further development of non-normative fuels, especially those based on domestic waste, which have high energy potential and can be an alternative, renewable energy source [34][35][36].…”

Section: Resultsmentioning

confidence: 99%

Emission of Harmful Substances from the Combustion of Wood Pellets in a Low-Temperature Burner with Air Gradation: Research and Analysis of a Technical Problem

Ciupek,

Nadolny

2024

Energies

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This paper includes a discussion of the results of tests concerning changes in the thermal and emission parameters of a boiler fuelled with wood biomass under the influence of air gradation in the combustion process. The test results ensure insight into the combustion process of wood biomass with air gradation, which significantly affected the operation of the device, increasing the mass concentration of the emitted nitrogen oxide (NOx) by combustion temperature lowering, especially in the afterburning zone. The authors observed an increase in the emission of particulate matter (PM) and carbon monoxide (CO) related to the change in the combustion process stoichiometry. The tests were carried out with the use of a heating boiler equipped with an automatic pellet burner. Apart from the mass concentration measurement of the pollution emitted, the tests focused on the measurements of temperature and oxygen levels in the flue gas. The objective of the tests was to confirm the applicability of the air gradation techniques in biomass combustion in order to reduce the emission of harmful substances from heating boilers, which is a technique that has recently been used in this group of devices. The test results obtained confirm the necessity for reorganising the technical systems of the currently used pellet burners and implementing further empirical tests.

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“…An example of an inefficient conversion of plastic-containing wastes is the experiments reported in [138] (producer gas contained 5-7% oxygen). The combustion of sea plastic waste mixed with wood pellets was experimentally studied in [139], where the authors found the instability of the combustion front associated with the mechanical instability of the packing, which is observed at a sufficiently large proportion of plastic (combustion becomes impossible at a plastic fraction of 80%). The authors of [140] studied fixed-bed combustion of polyurethane foam, and stationary conversion modes were observed (the authors of [141] used catalysts).…”

Section: Resultsmentioning

confidence: 99%

Particle Agglomeration of Biomass and Plastic Waste during Their Thermochemical Fixed-Bed Conversion

Donskoy

2023

Energies

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The article provides state-of-the-art research on agglomeration processes during fixed-bed combustion and gasification of low-grade fuels such as biomass and waste (primarily plastic-containing waste). Such fuels demonstrate complex thermal behaviour: their decomposition and combustion are multistage, accompanied by phase transitions, and may lead to fixed-bed mechanical instability and the non-uniformity of air distribution over the cross-section. To clarify the role of physicochemical factors (fuel composition and properties, reactor conditions), data from different sources are compared. The review shows that the fixed-bed agglomeration regimes can, in a rough approximation, be classified by the sintering mechanism (due to the melting of the mineral part or the organic part), with the following search for each mechanism realisation conditions by comparing the fuel properties and characteristic temperatures. Attempts to theoretically describe and numerically simulate the agglomeration phenomenon as a change in the structure of a reacting dispersed medium are also considered: the main directions in which such approaches can be developed are indicated.

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Co-combustion of refuse plastic fuel from marine plastics with wood pellets in a fixed-bed: Identification of minimum cofiring ratio and ideal air flow rate

Cited by 5 publications

References 33 publications

Pellets Obtained from the Husks of Sunflower Seeds and Beech Sawdust for Comparison

Pellets Obtained from the Husks of Sunflower Seeds and Beech Sawdust for Comparison

Emission of Harmful Substances from the Combustion of Wood Pellets in a Low-Temperature Burner with Air Gradation: Research and Analysis of a Technical Problem

Particle Agglomeration of Biomass and Plastic Waste during Their Thermochemical Fixed-Bed Conversion

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