Investigation of Biomass Gasification Process with Torrefaction Using Equilibrium Model

Kirsanovs, Vladimirs; Žandeckis, Aivars

doi:10.1016/j.egypro.2015.06.048

Cited by 16 publications

(10 citation statements)

References 17 publications

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“…Consequently, the composition of mixtures showed a significant change in N and Cl concentrations, which may be related to their formation and other chemical compounds. Figure 1 shows a strong correlation of element quantities presented in [9,12,13,21,22,25] with measurement results, which are presented in Table 1.…”

Section: Resultsmentioning

confidence: 77%

“…A large amount of buckwheat hulls is currently used in various industrial areas [18,19], and only a small part is used for thermal conversion processes [20]. However, judging from studies on the energetic properties of wood, wood pellets, and peat [21][22][23], buckwheat hulls have comparatively high energy potential [21]. This exploration of wheat straw and buckwheat hull mixtures aims to exploit the energy potential of buckwheat hulls and evaluate the ash melting characteristics by individual element impact assessments, enabling comparison with the results obtained in [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Buckwheat Hulls as Additives in the Production of Solid Biomass Fuel from Straw

2021

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The aim of this study was to further increase the amount of straw that can be used to produce solid biofuels, as currently only about 130–140 thousand of the 3 million tonnes of straw collected annually in Lithuania are used for solid biofuel production. Therefore, the use of buckwheat hulls as an additive in solid biofuel production was investigated. Mixtures of wheat straw and buckwheat hulls were used for this research, with an increase in buckwheat hulls from 25% to 75% of the total weight of the mixture. Results of the analysis of the chemical composition, moisture, ash, and volatile matter content of the mixtures, as well as their ash properties, were compared with the corresponding results obtained with pure buckwheat hulls, wheat straw, and wood chips. It is observed an increase in all ash melting temperatures by increasing the portion of buckwheat hulls in the mixture. Additionally, the ash shrinkage starting temperature was shown to increase as the total content of buckwheat hulls also increased in the mixture. This increase ranged from 90 °C to 210 °C. Furthermore, the Cl concentration in fuel mixtures and the corrosion risk of equipment are accordingly reduced by using buckwheat hulls, as an addition that does not contain Cl.

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Section: Resultsmentioning

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Investigation of Buckwheat Hulls as Additives in the Production of Solid Biomass Fuel from Straw

2021

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“…Torrefaction is one of the commonly used pretreatment methods for upgrading raw biomass into a solid fuel that is suitable for utilization in the thermal conversion process, given that it is associated with high energy density, low oxygen-to-carbon (O/C) ratio, and hydrophobic nature, as well as compactable, grindable, and reduces the formation of tar. 4,5 The effects of torrefaction on the pyrolysis behavior and its products have been reported by a group of researchers.…”

Section: Introductionmentioning

confidence: 98%

“…Each process has its own advantages and disadvantages. Torrefaction is one of the commonly used pretreatment methods for upgrading raw biomass into a solid fuel that is suitable for utilization in the thermal conversion process, given that it is associated with high energy density, low oxygen-to-carbon (O/C) ratio, and hydrophobic nature, as well as compactable, grindable, and reduces the formation of tar. , The effects of torrefaction on the pyrolysis behavior and its products have been reported by a group of researchers. Chen et al , reported that the pretreatment of biomass by torrefaction influences the yield and properties of pyrolysis products by reducing the yield of condensable liquid (or tar) and increasing the yield of biochar and noncondensable gases.…”

Section: Introductionmentioning

confidence: 99%

Torrefaction of Various Biomass Feedstocks and Its Impact on the Reduction of Tar Produced during Pyrolysis

2019

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The aim of this study is to investigate the reduction of tar produced during biomass pyrolysis by torrefaction pretreatment. In this study, various biomass feedstocks (pine, ash wood, miscanthus, and wheat straw) with different particle sizes were torrefied at 280 °C. The results indicated that both particle size and biomass composition have a significant effect on the yield and properties of the torrefied products. With increasing particle size, the yield of solid product increased, while the yield of condensable liquid and noncondensable gases decreased. The raw biomasses and torrefied biomasses were then subjected to pyrolysis at 500 °C. The results clearly showed that torrefaction had a significant effect on the yield and composition of tar generated during subsequent pyrolysis. For all biomasses, the tar yields of biomasses after torrefaction were 42–62% lower compared to direct pyrolysis of raw biomasses. However, when considering the condensable liquid produced combining torrefaction and pyrolysis, the total yield of condensable liquid produced decreased 3–12% compared to the direct pyrolysis. This suggests that not only some volatiles were released during the torrefaction process, but the thermal pretreatment also transformed the biomass structure to less favor tar production in subsequent pyrolysis step.

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“…The co-firing of most kinds of biomass may reduce the boiler efficiency. Wet wood chip for biomass gasification was studied and gasification efficiency increased for biomass with 20% [11]. It solves boiler fouling and corrosion problems up to some extent.…”

Section: Introductionmentioning

confidence: 99%

System Performance and Pollution Emission of Biomass Gas Co-Firing in a Coal-Fired Boiler

Abid¹,

Zhang²,

Wei-dong³

et al. 2020

JPEE

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To reduce greenhouse gases emission and increase the renewable energy utilization portion in the world, the biomass gasification coupled with a coal-fired boiler power generation system is studied. It is a challenge to achieve optimum performance for the coupled system. The models of biomass gasification coupled with co-firing of coal in a boiler have been established. A comparative study of three kinds of biomass (Food Rubbish, Straw and Wood Pellets) has been done. The syngas produced in a 10 t/h gasifier is fed to a 330 MWe coal-fired boiler for co-combustion, and the co-firing performances have been compared with pure coal combustion case under the conditions of constant boiler load. Results show that co-firing decreases the furnace combustion temperature and raises the flue gas temperature for Food Rubbish and Straw, while, flue gases temperature decrease in case of Wood Pellets. At the same time NO x and SO x emissions have reduced. The system efficiencies at constant load for Food Rubbish, Straw and Wood Pellets are 83.25%, 83.88% and 82.56% when the optimum conditions of gasification and co-firing process are guaranteed.

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Investigation of Biomass Gasification Process with Torrefaction Using Equilibrium Model

Cited by 16 publications

References 17 publications

Investigation of Buckwheat Hulls as Additives in the Production of Solid Biomass Fuel from Straw

Investigation of Buckwheat Hulls as Additives in the Production of Solid Biomass Fuel from Straw

Torrefaction of Various Biomass Feedstocks and Its Impact on the Reduction of Tar Produced during Pyrolysis

System Performance and Pollution Emission of Biomass Gas Co-Firing in a Coal-Fired Boiler

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