Explosion parameters and combustion kinetics of biomass dust

Liu, Aihua; Chen, Jieyun; Huang, Xiaofei; Lin, Junjiang; Zhang, Xiaochun; Xu, Wenbin

doi:10.1016/j.biortech.2019.122168

Cited by 37 publications

(19 citation statements)

References 31 publications

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“…According to the literature, explosion pressure depends mainly on the content of cellulose and lignin, and the rate of pressure increase is influenced by the content of hemicellulose. It has also been reported that the volatile dust content, size and shape of biomass particles directly affect the threat of ignition and dust explosion [65,[82][83][84]. Studies conducted by Shelf (2020) indicated that the maximum explosion pressure of coconut dust did not exceed 7 bar [85].…”

Section: Discussionmentioning

confidence: 99%

The Use of Wood Pellets in the Production of High Quality Biocarbon Materials

Saletnik

Zaguła

et al. 2022

Materials

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Biomass is one of the most important sources of renewable energy. One of the most widely used biomass biofuels is wood pellets. It is an economical, homogeneous and easy-to-use raw material. Biomass is used to generate low-emission energy utilizing the pyrolysis process. Pyrolysis allows for higher energy efficiency with the use of commonly available substrates. This thesis presents the results of research on the possibility of using the pyrolysis process to produce high-energy biocarbons from wood pellets. Data on basic energy parameters and explosivity of biocarbon dust were compiled as criteria for the attractiveness of the solution in terms of energy utility. The research used pellets made of oak, coniferous, and mixed sawdust, which were subjected to a pyrolysis process with varying temperature and time parameters. Carbon, ash, nitrogen, hydrogen, volatile substances, heavy metals, durability and calorific value of the tested materials were carried out. The highest increase in calorific value was determined to be 63% for biocarbons obtained at 500 ℃ and a time of 15 min, compared with the control sample. The highest calorific value among all analyzed materials was obtained from coniferous pellet biocarbon at 31.49 MJ kg−1. Parameters such as maximum explosion pressure, Pmax, maximum pressure increase over time, (dp/dt)max, and explosion rates, Kst max, were also analyzed. It was noted that biomass pyrolysis, which was previously pelletized, improved the energy parameters of the fuel and did not increase the risk class of dust explosion. The lowest and highest recorded values of Kst max for the analyzed materials were 76.53 and 94.75 bar s−1, respectively. The study concluded that the process used for processing solid biofuels did not affect the increase in the danger of dust explosion. The results presented in this article form the basis for further research to obtain detailed knowledge of the safety principles of production, storage, transport and use of these new fuels.

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Section: Discussionmentioning

confidence: 99%

The Use of Wood Pellets in the Production of High Quality Biocarbon Materials

Saletnik

Zaguła

et al. 2022

Materials

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“…During wood processing, dust is created as a by-product [1][2][3][4][5][6][7], and plays a negative role in assessing the risk of fire [8] or explosion [9][10][11][12][13][14]. Wood fust also poses a significant risk to the health of the human body [15,16].…”

Section: Introductionmentioning

confidence: 99%

Tropical Wood Dusts—Granulometry, Morfology and Ignition Temperature

et al. 2020

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The article considers the granulometric analysis of selected samples of tropical wood dust from cumaru (Dipteryx odorata), padauk (Pterocarpus soyauxii), ebony (Diospyros crassiflora), and marblewood (Marmaroxylon racemosum) using a Makita 9556CR 1400 W grinder and K36 sandpaper, for the purpose of selecting the percentages of the various fractions (<63; 63; 71; 200; 315; 500 μm) of wood dust samples. Tropical wood dust samples were made using a hand orbital sander Makita 9556CR 1400 W, and sized using the automatic mesh vibratory sieve machine Retsch AS 200 control. Most dust particles (between 50–79%) from all wood samples were under 100 μm in size. This higher percentage is associated with the risk of inhaling the dust, causing damage to the respiratory system, and the risk of a dust-air explosive mixture. Results of granulometric fractions contribution of tropical woods sanding dust were similar. Ignition temperature was changed by particle sizes, and decreased with a decrease in particle sizes. We found that marblewood has the highest minimum ignition temperature (400–420 °C), and padauk has the lowest (370–390 °C).

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“…This strongly modifies the heat release distribution in the flame. This large volatile content is also the cause for the higher propensity of biomass particles to create explosive atmospheres, which lead to additional safety requirements during handling and storage compared to coal [15].…”

Section: Introductionmentioning

confidence: 99%

Impact of intermittent renewable energy production on specific CO2 and NO emissions from large scale gas-fired combined cycles

Blondeau

Mertens

2019

Journal of Cleaner Production

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As they deliver dispatchable renewable energy, biomass power plants are expected to play a key role in the stability of the future electricity grids dominated by intermittent renewables. Large-scale, biomass-fired power plants are often retrofitted from coal-fired plants. Such a fuel modification combined with decreasing pollutant emission limits and higher requirements in terms of load flexibility can lead to a decrease of the maximum power delivered by the unit.The limiting factors are partly related to the control systems of those plants.In this paper, we present the results of the upgrading of a 80 MW e , retrofitted biomass power plant that was achieved by improving the dynamic control of the combustion process. Thanks to the addition of virtual air flow sensors in the control system and the re-design of the combustion control loops, the undesired effects of a recent 10% power increase on NO x emissions were more than compensated. The accurate control of the local NO x production in the furnace resulted in a decrease of these emissions by 15% with an increased stability. This study will help increasing the cost-effectiveness of such conversions, and facili-

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Explosion parameters and combustion kinetics of biomass dust

Cited by 37 publications

References 31 publications

The Use of Wood Pellets in the Production of High Quality Biocarbon Materials

The Use of Wood Pellets in the Production of High Quality Biocarbon Materials

Tropical Wood Dusts—Granulometry, Morfology and Ignition Temperature

Impact of intermittent renewable energy production on specific CO2 and NO emissions from large scale gas-fired combined cycles

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