Effect of kaolin addition on alkali capture capability during combustion of olive residue

Batir, Ozge; Selçuk, Nevín; Kulah, Gorkem

doi:10.1080/00102202.2018.1452376

Cited by 10 publications

(4 citation statements)

References 18 publications

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“…On the other hand, the diffraction peaks of muscovite and zeolite W gradually The results were in contrast with the findings from a previous study reported by Wen and Yan [20] where kalsilite was prepared by calcining dried slurry made of aqueous potassium silicate and potassium hydroxide solutions as well as aqueous aluminum nitrate at 1000 and 1200 ºC. The present hydrothermal method used a temperature almost 5 times lower than the work by Wen and Yan [20] and 4 times lower than the study by Batir et al [21] to synthesize kalsilite, potentially reducing the production cost. Moreover, the product formed in this work had smaller crystallites, which are highly suitable in the catalysis field.…”

Section: Resultscontrasting

confidence: 91%

Phase transformation of kaolinite to hexagonal kalsilite using K2CO3

et al. 2022

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Hydrothermal synthesis of kalsilite was facilitated by the inclusion of potassium carbonate (K 2 CO 3 ) as the source of the potassium ion. After a 24 h reaction at 220 °C, kaolin clay treated with 1.25 M K 2 CO 3 showed the most significant peaks at 2θ of 28.5° and 34.7° by X-ray diffraction corresponding to the hexagonal kalsilite. In addition, field emission scanning electron microscopy images also revealed hexagonal particles proving the formation of the desired mineral. The orthorhombic boehmite and monoclinic bayerite were formed as the dominant phases at lower K 2 CO 3 molarity (<1.0 M), whereas kalsilite was recognized as the minor crystalline phase. The crystallinity of hexagonal kalsilite increased at higher K 2 CO 3 concentration (>1.0 M) while the reaction temperature remained at 220 °C. Furthermore, the energy dispersive spectroscopy pattern of kalsilite showed a significant atomic percentage of potassium in the aluminosilicate material, indicating its formation.

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Section: Resultscontrasting

confidence: 91%

Phase transformation of kaolinite to hexagonal kalsilite using K2CO3

et al. 2022

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“…The results showed that no bed agglomeration was occurred when using fireclay as the additive even at a prolonged reaction time. Another study performed by Batir et al (2019), using kaolin as an additive, was able to sequester the formation of KCl and KOH. Two species could lead to problems in the thermal conversion of biomass, owing to the interaction with kaolin to form potassium alumina silicates.…”

Section: Additivesmentioning

confidence: 99%

Critical review of the role of ash content and composition in biomass pyrolysis

Puri,

Hu,

Naterer

2024

Front. Fuels

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In the face of environmental challenges (e.g., dramatically increasing greenhouse gas emissions and climate change), it is utmost of importance to sustainable energy systems. Biomass consisting of agricultural and forest waste, municipal solid waste, and aquatics, has been identified as alternative and promising fuel sources. Thermochemical conversion approaches like pyrolysis can turn various types of biomass into three valuable product streams, namely, bio-oil, biochar, and syngas. To date, past review articles have considered the major operating parameters of kinetics, chemistry, and the application of pyrolysis products. However, ash content is one of the key biomass components that lacks investigation on its influence during biomass pyrolysis with respect to products yield and properties. This review article examines: i) the ash content and composition in different types of biomass; ii) effects of ash content on catalytic pathway and biomass thermal degradation; iii) ash related problems in the thermal degradation of biomass; and iv) available deashing techniques for biomass. The review aims to provide new understandings and insights regarding the effects of ash content and composition on biomass pyrolysis.

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“…The increase in temperature will affect the intensity of physico-chemical reactions, interactions of ash particles, the movement of flue gas, and the corrosion of refractory lining and metal parts of boilers. A possible way to prevent bio-ash slagging and agglomeration is to use additives that are added to the fuel to raise the melting point of the bio-ash [4,[25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Study of Dendromass Ashes Fusibility with the Addition of Magnesite, Limestone and Alumina

et al. 2023

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The fusibility of ash from woodchip combustion is characterised in the present work. The impact of the increase in MgO, CaO, and Al2O3 content in the bio-ash on the classification of ash into categories according to slagging and fouling indices was evaluated. The ash was characterized based on the chemical composition using slagging and fouling indices. However, these ash composition changes did not assign the ash into categories of the indices FU, SR, RS, and B/A (fouling, slagging, slag viscosity, basicity), with less ash inclination to slagging and fouling. The indices were primarily derived for ashes from coal combustion. The indices values characterizing the ash were compared with measured results of ash melting according to STN ISO 540. The measured ash fusibility values showed that the addition of magnesite, limestone, and alumina to dendro-ashes increases the DT (temperature of deformation), HT (temperature of hemisphere), and the AFI (ash fusibility index). There is no conformity between the values of the indices and the measurement of ash fusibility temperatures. In terms of temperatures in the combustion chamber, the measured sintering (Tsin) and DT are suitable for evaluating the tendency of ash to slagging and fouling as well as an accretion of ash particles sticking to the lining.

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Effect of kaolin addition on alkali capture capability during combustion of olive residue

Cited by 10 publications

References 18 publications

Phase transformation of kaolinite to hexagonal kalsilite using K2CO3

Phase transformation of kaolinite to hexagonal kalsilite using K2CO3

Critical review of the role of ash content and composition in biomass pyrolysis

Study of Dendromass Ashes Fusibility with the Addition of Magnesite, Limestone and Alumina

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