Speciation and distribution of alkali, alkali earth metals and major ash forming elements during gasification of fuel cane bagasse

Jordan, C. Andrea; Akay, G.

doi:10.1016/j.fuel.2011.05.031

Cited by 76 publications

(30 citation statements)

References 26 publications

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“…Especially, most of P, Ca, and Mg are acid-soluble but water-insoluble. This conclusion is also confirmed by some previous work [23,24]. Hence, to better realize the closed cycle of nutrients in rice straw, the following two principles should be followed: (1) the ashing temperature should not be higher than 600 °C, (2) the rice straw ash should be applied to acidic soil.…”

Section: Solubility Of Beneficial Elementsupporting

confidence: 76%

“…At the same time, the elements solubilities differ significantly with each other. Most of Ca and Fe, 30% of K, 32% of Na, 48% of Al, 25% of S, and 48% of P in the solid residue of cane bagasse gasification were acid-soluble [23]. Moreover, in wood combustion ash, 81% of Ca, 57% of Mg, 34% of K, and 20% of P were soluble in the ammonium acetate aqueous solution of pH = 4.2 [24].…”

Section: Introductionmentioning

confidence: 98%

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Comparisons of Acid and Water Solubilities of Rice Straw Ash Together with Its Major Ash-Forming Elements at Different Ashing Temperatures: An Experimental Study

Zhang

Wei

et al. 2019

Sustainability

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Recycling utilization of straw ash as a fertilizer in farmland is expected to play an important role in the sustainable development of both agriculture and biomass energy. However, the ashing temperature and the aqueous solution characteristics may affect the recycling properties of the nutrients contained in the ash. The solubilities of both the ash and its elements can represent the above recycling properties. This paper presents a systematic experimental investigation on the acid solubilities of both rice straw ash and its major elements produced from combustion at 400–800 °C, and these findings are compared with the corresponding water solubilities obtained from the authors’ previous work. Meanwhile, the correlations of two solubilities with the ashing temperature were given based on the experimental data. Results show that the acid solubility of rice straw ash decreases linearly by approximately 76% as the ashing temperature increases from 400 to 800 °C, while it is significantly higher than the corresponding water solubility at different temperatures. The acid solubilities of K, P, Ca, Mg, and Na are higher than their water solubilities, whereas two solubilities of S and Cl have almost no dependence on the temperature and the acidity of solution. This study also reveals a strong negative linear relationship between the solubility of K and the temperature. The solubilities of other elements (P, S, Na, Ca, Mg, and Cl) with the temperature have quadratic curve or cubic curve relationships. Furthermore, it is recommended that the ashing temperature should be lower than 600 °C to avoid the loss of some nutrients in the straw ash.

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Section: Solubility Of Beneficial Elementsupporting

confidence: 76%

Section: Introductionmentioning

confidence: 98%

Comparisons of Acid and Water Solubilities of Rice Straw Ash Together with Its Major Ash-Forming Elements at Different Ashing Temperatures: An Experimental Study

Zhang

Wei

et al. 2019

Sustainability

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“…The quantity of chlorine compounds decreased, which indicated that the alkali metal chloride was being released gradually as the temperature increased, and the alkali metals were mostly converted into insoluble carbonate, sulfate, silicate, and aluminosilicate compounds. The solid watersoluble substances, such as NaSiO3·5H2O, generated at 600 °C were mostly converted into solid water-insoluble substances, such as NaAlSiO4 and Na(AlSi3O8), at higher temperatures (Jordan and Akay 2012). An X-ray diffractograph for corn straw is shown in Fig.…”

Section: The Microstructure Of the Solid Residue From And Distributiomentioning

confidence: 99%

A Study on the Migration Behavior of K, Na, and Cl during Biomass Gasification

Yang¹,

Jia²,

Xing³

et al. 2016

BioResources

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The migration behavior of the alkali metals and chlorine were studied during rice straw and corn straw gasification in a fixed bed reactor at various temperatures using thermodynamic equilibrium calculations, X-ray diffraction (XRD), and scanning electron microscopy/energy dispersive spectrometry (SEM-EDS). The results showed that K and Na were released mostly in chloride form. The release of potassium, sodium, and chlorine increased upon the increase in temperature from 600 to 1000 °C. The maximum amounts of potassium, sodium, and chlorine that were released from rice straw were 38.9%, 18.7%, and 34.9%, respectively. The maximum amounts of potassium and chlorine that were released from corn straw were 24% and 43.6%, respectively, which occurred at 1000 °C. The maximum amount of sodium released from corn straw was 77.6%, at 700 °C, and the amount of sodium released was greater than that of potassium. Most of the potassium and sodium was converted into insoluble carbonate, sulfate, silicate, and aluminosilicate compounds in the gasification ash.

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“…Generally, the solid-phase occurrence of alkali metals can be divided into four categories via extraction separation. 14 − 16 (1) Water-soluble alkali metals: alkali metals that are soluble in water, such as KCl, K 2 SO 4 , and K 2 CO 3 . (2) Ammonium acetate soluble alkali metals: alkali metals bonded with oxygen-containing functional groups such as a carboxyl group, which can be plasma exchanged with NH 4 + .…”

Section: Introductionmentioning

confidence: 99%

Effects of S and Al on K Migration and Transformation during Coal and Biomass Co-combustion

et al. 2022

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The co-combustion of biomass and coal has both environmental and economic benefits in terms of pollutants and greenhouse gas emissions. However, one of the key factors affecting the feasibility of this technology is the ash deposition and corrosion caused by the high alkali metal content of biomass, especially K. After the addition of elemental S to corn stalk/Xiaolongtan lignite blended fuel and Al 2 O 3 to corn stalk/Datong lignite, combustion experiments were carried out in a tubular furnace to explore the effects of S and Al in coal on K migration and transformation. The experimental results show that when S/K < 6, an increase in the S/K ratio inhibited the release of K. When S/K > 6, the sulfation become saturated, and an increase in S promoted the release of K. When S/K = 6, the higher the temperature was, and the more obvious the inhibitory effect on the release of K was. Increasing the S/K ratio not only increased the CaSO 4 content of the ash but also increased the content of water-soluble K compounds, such as K 2 SO 4 , and decreased the contents of acid-soluble K compounds and insoluble K compounds, such as KAlSi 3 O 8 . After Al 2 O 3 was added, as the Al/K ratio increased, the K release rate gradually decreased. When the sample with Al/K = 2.5 and the original samples were burned at 600–700 °C, the difference in the K release rates of the two samples was relatively small. When the temperature was higher than 700 °C, the higher the temperature was, and the greater the difference in the K release rates of the samples was, which indicates that a high temperature promotes the formation of aluminosilicates containing K.

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Speciation and distribution of alkali, alkali earth metals and major ash forming elements during gasification of fuel cane bagasse

Cited by 76 publications

References 26 publications

Comparisons of Acid and Water Solubilities of Rice Straw Ash Together with Its Major Ash-Forming Elements at Different Ashing Temperatures: An Experimental Study

Comparisons of Acid and Water Solubilities of Rice Straw Ash Together with Its Major Ash-Forming Elements at Different Ashing Temperatures: An Experimental Study

A Study on the Migration Behavior of K, Na, and Cl during Biomass Gasification

Effects of S and Al on K Migration and Transformation during Coal and Biomass Co-combustion

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