Ignition of the wood biomass particles under conditions of near-surface fragmentation of the fuel layer

Кузнецов, Г. В.; Gutareva, N.Y.; Kostoreva, A.A.; Kostoreva, Zh.A.

doi:10.1016/j.fuel.2019.03.126

Cited by 26 publications

(6 citation statements)

References 63 publications

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“…At lower temperatures, such as 25 • C, the moisture content in the pellets is higher. As the temperature rises, the heat energy applied to the pellets facilitates the evaporation of moisture, leading to a decrease in the overall water content [20]. This reduction in moisture content can contribute to a higher calorific value, as the energy is focused more on the combustible components.…”

Section: Calorific Valuementioning

confidence: 99%

Biomass Fuel Characteristics of Malaysian Khaya senegalensis Wood-Derived Energy Pellets: Effects of Densification at Varied Processing Temperatures

Ismail,

Khor,

Mohamed

2024

JMMP

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This study addresses the effects of densification at varied pelletization temperatures on the novel Malaysian Khaya senegalensis wood-derived pellets biomass fuel characteristics. The lack of comprehensive understanding regarding the biomass fuel characteristics of this species prompted the research. By addressing this knowledge gap, this study explores the impact of temperature variations on key fuel properties, contributing to the optimization of sustainable biomass fuel production in manufacturing and materials processing. Khaya senegalensis wood, grown and harvested in Malaysia, was pelletized at different temperatures to analyze the calorific value, volatile matter content, ash content, fixed carbon, bulk density, and moisture contents of the pellets. The experimental data revealed a significant relationship between temperature and these fuel properties. Pelletizing at 75 °C produced the highest calorific value of 19.47 MJ/kg and the maximum fixed carbon content of 10.04%. A low ash level of 4.26% was achieved via pelletizing at 75 °C. According to the results, 75 °C produced the best thermophysical properties. These findings provide valuable understanding of how pelletization temperature influences fuel pellet thermophysical properties, a critical aspect in optimizing fuel pellet production, storage, advancing renewable energy resource utilization, and, finally, promoting a cleaner and more sustainable energy future.

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Section: Calorific Valuementioning

confidence: 99%

Biomass Fuel Characteristics of Malaysian Khaya senegalensis Wood-Derived Energy Pellets: Effects of Densification at Varied Processing Temperatures

Ismail,

Khor,

Mohamed

2024

JMMP

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“…Consequently, the moisture content of the biofuel pellets decreases as water is lost in the form of vapor [11,12]. A previous study by [16] further added that the process of moisture evaporation can be likened to the pyrolysis phenomenon, taking place within a limited and dynamic region referred to as the evaporation front. The velocity of the aforementioned front is contingent upon the temperature of its surface.…”

Section: Pelletization Temperature Effects On Pellet Moisturementioning

confidence: 99%

Cracking the Code: Process Parameter Effects on Khaya senegalensis Energy Pellet Moisture Content

Ras Izzati Ismail,

Chu Yee Khor,

Alina Rahayu Mohamed

2023

ASET

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The production of energy pellets from biomass sources holds immense potential for sustainable renewable energy generation. This study investigates the influence of key process parameters on the moisture content of energy pellets derived from Khaya senegalensis, a promising biomass feedstock in Malaysia. With a focus on unlocking the relationship between process variables and pellet moisture, a systematic experimental approach was adopted. The objective of this study is to investigate the effects of raw material moisture, feedstock particle size, compression pressure, and pelletization temperature on the manufactured biomass energy pellet's moisture content. By employing a comprehensive design of experiments and statistical analysis, the nuanced effects of these parameters are revealed on the moisture content of Khaya senegalensis energy pellets. The results illuminate the complex interplay between these process variables and the final moisture characteristics of the pellets. Understanding how these parameters impact moisture content is crucial for optimizing pellet quality, combustion efficiency, and storage stability. The study found a quadratic relationship between particle size, compression pressure, and pelletization temperature, indicating that larger particle sizes correlate with higher moisture content. Excessive pressure led to elevated levels while increasing temperature showed a decreasing trend. This research contributes valuable insights that advance the knowledge frontier of biomass pelletization, paving the way for enhanced utilization of Khaya senegalensis as a renewable energy resource.

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“…Destruction of fuel particles into smaller ones is referred to as fragmentation. This phenomenon occurs in the process of fuel combustion, gasification and pyrolysis [47][48][49]. There are two types of fragmentation.…”

Section: Particles Fragmentation During Combustionmentioning

confidence: 99%

Experimental Study to Replicate Wood Fuel Conversion in a Downdraft Gasifier: Features and Mechanism of Single Particle Combustion in an Inert Channel

Svishchev

2022

Applied Sciences

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Downdraft gasification is a promising process of energy conversion of wood biomass. There are such fuel conversion conditions that differ favorably from conventional conditions. In such conditions, there is no pyrolysis zone in the fuel bed, which precedes the oxidation zone. Fuel is supplied into the oxidizing zone without charring, where it reacts with the intensive cold air flow from tuyeres. The study aims to replicate the conversion of particles in a gasifier close to tuyeres. For this purpose, the individual particles are burned in the muffle furnace space and the quartz channel replicating presence of other bed particles at a first approximation. In the experiment, the furnace temperature was varied, as well as the velocity of air supplied to the particle. Two-stage and single-stage mechanisms of particle combustion were identified. A two-stage process is observed in the range of tuyere velocities below 20 m s−1. The two-stage mechanism is characterized by a stage of devolatilization and volatiles combustion, followed by a stage of char residue combustion. The stages are predominantly separate from each other, and their degree of overlapping is low, amounting to 24%. At the tuyere velocities above 125 m s−1 combustion of particles is realized primarily as a single-stage process. The intensive air flow reaches the fuel particle surface and initiates combustion of the surface char layer. In this case, the stages of devolatilization and char residue combustion run concurrently for the most part. In the single-stage mechanism, the degree of stage overlapping is significantly higher and amounts to 60–95%. For the two-stage combustion mechanism, the effect of cyclic movement of the flame across the particle surface is evident. The number of cycles can reach eight. This effect is due to the change of conversion stages. At air velocity above 95 m s−1, fragmentation of fuel particles commences. A layer of char formed at an initial stage of burning heats up in the intensive air flow and is separated from the particle surface. The heated walls of the quartz channel contribute to the intensification of particle combustion. This effect is probably due to the swirling of the flame between the wall and the particle surface.

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Ignition of the wood biomass particles under conditions of near-surface fragmentation of the fuel layer

Cited by 26 publications

References 63 publications

Biomass Fuel Characteristics of Malaysian Khaya senegalensis Wood-Derived Energy Pellets: Effects of Densification at Varied Processing Temperatures

Biomass Fuel Characteristics of Malaysian Khaya senegalensis Wood-Derived Energy Pellets: Effects of Densification at Varied Processing Temperatures

Cracking the Code: Process Parameter Effects on Khaya senegalensis Energy Pellet Moisture Content

Experimental Study to Replicate Wood Fuel Conversion in a Downdraft Gasifier: Features and Mechanism of Single Particle Combustion in an Inert Channel

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