Improving inorganic composition and ash fusion behavior of spruce bark by leaching with water, acetic acid, and steam pre-treatment condensate

Singhal, Abhishek; Goel, Avishek; Bhatnagar, Anubhuti; Roslander, Christian; Wallberg, Ola; Konttinen, Jukka; Joronen, Tero

doi:10.1016/j.cej.2022.139351

Cited by 13 publications

(3 citation statements)

References 61 publications

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“…The evaporation of volatile substances (KCl, NaCl, and SO 2 ) led to the compositional variation of bamboo ash. Alkaline oxides, Cl and S, were the main chemical components of deposition and active corrosion during the combustion process of biofuel. , Ash elements, such as S, Cl, and highly volatile basic oxides, were easily released into the gas phase during fuel combustion. , The thermal property of silicon was very stable, which was difficult to transfer into the gas phase. Therefore, the ratios of K 2 O, SO 3 , Cl, and Na 2 O relative to the SiO 2 content were calculated for different bamboo ashes.…”

Section: Resultsmentioning

confidence: 99%

“…Alkaline oxides, Cl and S, were the main chemical components of deposition and active corrosion during the combustion process of biofuel. 32 , 33 Ash elements, such as S, Cl, and highly volatile basic oxides, were easily released into the gas phase during fuel combustion. 12 , 34 The thermal property of silicon was very stable, which was difficult to transfer into the gas phase.…”

Section: Resultsmentioning

confidence: 99%

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The Ash-Forming Element Migration and Mineral Transformation during the Bamboo Combustion Process

Su,

Ni,

Rong

et al. 2024

ACS Omega

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To investigate the effect of combustion temperatures on element transformation of ash, bamboo was fired using a muffle furnace at 550, 600, 700, 800, 900, and 1000 °C. Chemical compositions, micromorphology, and mineral and thermal behavior of ash were characterized. The main components included K2O, SiO2, P2O5, MgO, and CaO at a temperature of 550 °C. The high temperature decreased the content of K2O from 63.03 to 35.71% to improve the fusion characteristics of bamboo ash. 700 °C was a key temperature for designing a combustion system of bamboo, where bamboo ash had a maximum volatility. The mineral phases were chlorides, carbonates, and sulfates below a temperature of 700 °C, which transformed to complex silicates, aluminosilicates, and phosphates above a temperature of 700 °C. The temperature ranges of the three main stages were 550–980, 980–1190, and 1190–1500 °C, corresponding to mass losses of 11.52, 6.13, and 17.17%, respectively.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

The Ash-Forming Element Migration and Mineral Transformation during the Bamboo Combustion Process

Su,

Ni,

Rong

et al. 2024

ACS Omega

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“…It is well known that most alkali metals can be removed by water washing due to their good water solubility, and about 10% of acid-soluble alkali metals need to be removed by dilute acid. For example, the ash removal rate of pine bark is less than 10% after water washing, and acid washing can only remove about 30% of K and Na in the bark [ 8 ], while the removal rate of Mg and Ca from Ulva lactuca by acid washing is more than 90% [ 9 ]. However, some water-soluble AAEMs are transformed into an organic binding form during the pyrolysis process, decreasing the proportion of water-soluble AAEMs in biochar, which significantly reduces the deashing efficiency of water washing [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Deashing Treatment on Ash Fusion Characteristics of Biochar from Bamboo Shoot Shells

Ren,

Gao,

et al. 2024

Molecules

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To investigate the influence of deashing on fusion characteristics, a combined method of water and acid washing with different sequences (water washing followed by acid washing, and acid washing followed by water washing) was used to treat the biochar of bamboo shoot shells (BBSSs). The results show that deashing decreased the K content of the biochar from 50.3% to 1.08% but increased the Si content from 33.48% to 89.15%. The formation of silicates and aluminosilicates from alkali metal oxides with silicon was an inevitable result of ash phase transformation at the high temperatures used to improve the fusion temperature (>1450 °C). The thermochemical behavior of ash mainly occurs at 1000 °C. The deashing treatment significantly reduced the reaction intensity during the high-temperature process. This significantly increased the thermal stability of the ash. The adjustment of the washing sequence had a slight impact on the chemical compositions, but the differences in ash micromorphology were obvious. Deashing treatments with different washing sequences can significantly improve ash fusion properties effectively and reduce the risk of scaling, slagging, and corrosion. This study provides a new and reasonable strategy for the deashing of biochar to commercially utilize bamboo shoot shell resources.

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Effects of different pretreatment methods on millet straw and millet bran for fuel properties and pyrolysis bio-oil

Chen,

Wang,

et al. 2023

J Therm Anal Calorim

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Improving inorganic composition and ash fusion behavior of spruce bark by leaching with water, acetic acid, and steam pre-treatment condensate

Cited by 13 publications

References 61 publications

The Ash-Forming Element Migration and Mineral Transformation during the Bamboo Combustion Process

The Ash-Forming Element Migration and Mineral Transformation during the Bamboo Combustion Process

Effect of Deashing Treatment on Ash Fusion Characteristics of Biochar from Bamboo Shoot Shells

Effects of different pretreatment methods on millet straw and millet bran for fuel properties and pyrolysis bio-oil

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