Comparison of the influence of additives on the melting behaviour of wheat straw and fibre hemp ash

Čepauskienė, Deimantė; Vaškevičienė, Irena; Praspaliauskas, Marius; Pedišius, Nerijus

doi:10.1007/s13399-022-03323-1

Cited by 4 publications

(2 citation statements)

References 49 publications

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“…A similar strong increase in bonding potassium to potassium-aluminosilicates was observed for the combustion of wood pellets. On the other hand, in the study by Čepauskien ė et al, [116] the incineration of wheat straw was visibly improved with the addition of kaolin at 2% mass ratio, with a slight increase in the amount of ash produced. In the study by Sobieraj et al [77], the stoichiometric additive (halloysite) ratio was calculated to neutralize the chlorine content in the fuel, taking into account 88 samples of various biomass types.…”

Section: Determination Of the Optimal Additive Dosementioning

confidence: 85%

Aluminosilicate Clay Minerals: Kaolin, Bentonite, and Halloysite as Fuel Additives for Thermal Conversion of Biomass and Waste

Maj

Matus

2023

Energies

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The current focus on renewable energy sources and the circular economy favors the thermal conversion of low-quality fuels, such as biomass and waste. However, the main limitation of their usability in the power sector is the risk of slagging, fouling, ash deposition, and high-temperature corrosion. These problems may be avoided or significantly mitigated by the application of aluminosilicate clay minerals as fuel additives. In this paper, the three most commonly occurring aluminosilicates are reviewed: kaolin, halloysite, and bentonite. Their application has been proven to minimize combustion-related problems by bonding alkalis in high-melting compounds, thus increasing ash melting temperatures, reducing ash deposition tendencies, and decreasing the particulate matter emission. Due to excellent sorption properties, aluminosilicates are also expected to fix heavy metals in ash and therefore decrease their emissions into the atmosphere. The application of aluminosilicates as fuel additives may be a key factor that increases the attractiveness of biomass and other low-quality fuels for the power sector.

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Section: Determination Of the Optimal Additive Dosementioning

confidence: 85%

Aluminosilicate Clay Minerals: Kaolin, Bentonite, and Halloysite as Fuel Additives for Thermal Conversion of Biomass and Waste

Maj

Matus

2023

Energies

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“…The melting characteristic of ash is an important property that is considered in evaluating the quality of biofuels and which often causes problems in the thermal conversion of biomass. At low values of ash deformation and softening temperatures, slag, sticky and hard-toremove impurities are formed (Mankowsk et al 2014;Čepauskienė and Pedišius 2018;Čepauskienė and Pedišius 2019). It is desirable that the ash maintains its state up to at least 1100 °C.…”

Section: Effect Of the Thermochemical Conversion Processmentioning

confidence: 99%

Effect of thermochemical treatment on the physicochemical properties of fiber hemp (Cannabis sativa L.) by-product

Žiūra,

Zvicevičius,

Černiauskienė

et al. 2023

BioRes

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The growing demand for biomass is forcing attention toward alternative resources, including agricultural by-products such as fiber hemp (Cannabis sativa L.). Growing hemp for seed produces about 10 tons of dry matter by-products per hectare. Processing-conversion technologies used in practice change the properties of primary raw materials, give them higher added value, and prepare them for various needs. In addition to economic benefits, biochar contributes to carbon sequestration and increases the sustainability of agricultural production. This study evaluated the effect of thermochemical treatment in an oxygen-free environment on some physicochemical properties of the fiber hemp by-products of the Felina 32 variety. At a heating temperature of 700 °C, the biomass yield of biochar from stems was 28.4 ± 0.5% and from seed husks was 30.6 ± 0.6%. At that time, the carbon concentration in fiber hemp stems biochar increased 1.82 times, from 45.0 ± 2.26% to 81.9 ± 8.46%, and in seed husk biochar by 1.20 times, from 56.5 ± 11, 6% to 67.9 ± 7.47%. Furthermore, the changes in the fractional composition, density, calorific value, ash content, and ash melting characteristics that occurred during the conversion of primary raw material of fiber hemp into biochar were evaluated.

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Advances in Efficient Utilization of Low-Rank Fuels in Coal and Biomass-Fired Systems: A Comprehensive Review

Bankefa,

Nasah,

Laudal

et al. 2024

Energy Fuels

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While coal−biomass cocombustion has gained considerable attention as a climate-sensitive power generation strategy, the detrimental impact of inorganic species present in low-rank fuels can lead to counterproductive outcomes in combustion systems. Low-rank solid fuels negatively affect heat transfer efficiency and energy conversion during steam generation, resulting in adverse environmental consequences. However, a combination of improved combustion technology and fuel quality improvements can enable the safe utilization of these fuels. This review highlights the pressing need for research in fuel quality improvement as an effective climate change mitigation strategy during the global transition to renewable energy sources. Identifying the problematic species in solid fuels and understanding the mechanisms of ash formation are critical steps toward designing effective strategies to control ash aerosol-induced fouling. The paper discusses methods for promoting clean combustion, including fuel pretreatment and cocombustion. Additionally, the review examines recent advancements in fuel improvement strategies, such as CFD-targeted-in-furnace injection (CFD-TIFI), intelligent soot blowing, and fuel additive technology, with a focus on mineral additives. Due to its high efficiency, low cost, and minimal retrofit requirements, additive technology holds promise for large-scale applications, paving the way for fuel flexibility in utility-scale power generation. The current study emphasizes the importance of fuel ash mineral transformation and characterization techniques for evaluating the effectiveness of fuel additives. Assessing the viability of utility-scale applications economically and the feasibility of a large-scale demonstration requires further research.

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Comparison of the influence of additives on the melting behaviour of wheat straw and fibre hemp ash

Cited by 4 publications

References 49 publications

Aluminosilicate Clay Minerals: Kaolin, Bentonite, and Halloysite as Fuel Additives for Thermal Conversion of Biomass and Waste

Aluminosilicate Clay Minerals: Kaolin, Bentonite, and Halloysite as Fuel Additives for Thermal Conversion of Biomass and Waste

Effect of thermochemical treatment on the physicochemical properties of fiber hemp (Cannabis sativa L.) by-product

Advances in Efficient Utilization of Low-Rank Fuels in Coal and Biomass-Fired Systems: A Comprehensive Review

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