Ash fusion characteristics of biomass pellets during combustion

Zhai, Ming; Li, Xuesong; Yang, Di; Ma, Zhaoyang; Dong, Peng

doi:10.1016/j.jclepro.2022.130361

Cited by 31 publications

(11 citation statements)

References 38 publications

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“…The total amount of ash produced during corn cob combustion is composed of volatile fly ashes (fine ash) and non-volatile burnt ashes (coarse ash). The literature analysis shows that non-volatile burnt ashes have a relatively higher melting point and higher volatile matter [37]. Ash content is one indicator of biomass quality.…”

Section: Chemical Composition Of Raw Materialsmentioning

confidence: 99%

Performance of Corn Cob Combustion in a Low-Temperature Fluidized Bed

Paulauskas,

Praspaliauskas,

Ambrazevičius

et al. 2024

Energies

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This study investigates the combustion of agricultural biomass rich in alkali elements in the fluidized bed. The experiments were performed with smashed corn cob in a 500 kW fluidized bed combustor which was designed for work under low bed temperatures (650–700 °C). During the experiments, the formed compounds from corn cob combustion were measured by sampling particulate matter, and mineral compositions were determined. Also, the temperature profile of the FBC was established. It was determined that the emissions of K and Na elements from the FBC increased from 4 to 7.3% and from 1.69 to 3%, respectively, changing the bed temperature from 650 to 700 °C. Though alkali emissions are reduced at a 650 °C bed temperature, CO emissions are higher by about 50% compared to the case of 700 °C. The addition of 3% of dolomite reduced the pollutant emissions and alkali emissions as well. Potassium content decreased by about 1% and 4%, respectively, at the bed temperatures of 650 °C and 700 °C. The NOx emissions were less than 300 mg/m3 and did not exceed the limit for medium plants regarding DIRECTIVE (EU) 2015/2193. During extended experiments lasting 8 h, no agglomeration of the fluidized bed was observed. Moreover, the proposed configuration of the FBC and its operational parameters prove suitable for facilitating the efficient combustion of agricultural biomass.

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Section: Chemical Composition Of Raw Materialsmentioning

confidence: 99%

Performance of Corn Cob Combustion in a Low-Temperature Fluidized Bed

Paulauskas,

Praspaliauskas,

Ambrazevičius

et al. 2024

Energies

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“…The characteristic ash fusion temperatures (AFT) of animal waste are displayed in Table 4 and include the initial deformation temperature (IT), softening temperature (ST), hemispherical temperature (HT), and fluid (flow) temperature (FT). The ash fusion temperatures of biomass ash typically range from 1100 • C to 1300 • C [132]. These values can, however, vary depending on the biomass type.…”

Section: Problems and Challengesmentioning

confidence: 99%

Significance and Challenges of Poultry Litter and Cattle Manure as Sustainable Fuels: A Review

Maj

2022

Energies

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Growing animal production results in a significant amount of waste, composed of manure, bedding, feed, feathers, etc., whose safe and cost-effective disposal becomes a troublesome challenge. The literature review points out that the higher heating value (HHV) of animal-origin waste reaches 19 MJ/kg (dry basis), which positions it as a promising renewable energy source. Various paths of energy recovery were investigated in the literature, but the thermal processes, particularly combustion and co-combustion, were indicated as the most effective from both technical and environmental points of view. The presented study reviews the fuel characteristics, possible combustion-related challenges, and ash disposal routes of the most popular animal-origin waste: poultry litter and cow (cattle) manure with a slight sight on piggery (swine) manure. When considering animal-origin feedstock as fuel, usually only animal species is given (poultry, cattle, etc.). However, according to the analyzed literature data, this is not sufficient information. Several more factors crucially influence the fuel and ash properties of animal waste and the most vital are: the housing system, type of bedding, and farming style. Animal litter is considered a “difficult” fuel, nevertheless, it does not always cause combustion-related problems. Some analyzed feedstock feature low chlorine concentrations and high ash melting temperatures, which makes them combustion-friendly.

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“…The ash carried by the flue gas will melt at a specific temperature and cause slag so that it can deflate combustion efficiency and deflate the quality of heat transfer [13]- [15]. However, flue gas as a drying agent is still a research object.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Ash Content on Bagasse Drying Agent and the Effect on Combustion at Sugarcane Mill

2023

IJETER

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The sugarcane mill is an industry that processes sugarcane into sugar. Bagasse is a by-product of this process. Bagasse can be used as a solid fuel. Drying bagasse at the first of any processes is essential to reduce the moisture content. The highest moisture content reduction is achieved using higher mass and flue gas temperature. Flue gas can be used as a drying agent and will give an advantage to the mill with attention to the combustion process to handle the distribution of ash content on flue gas. As a drying agent, flue gas makes ash content from the flue gas component trapped at the bagasse feed. The high amount of ash content at bagasse makes the combustion efficiency decrease. This study is focused on discussing the ash production of flue gas and their effect as a drying agent on the bagasse combustion efficiency in sugarcane mills. The answer for the problem is solved by makes a simulation of the energy-generating plant using the software Aspen Plus. The condition of the plant is set with 1000 kg/h bagasse and 50 wt.% dried until 10 wt.% moisture content with one point two equivalence ratio. The result of this works is the decrease of combustion efficiency was reported at around 0.57% per hour periodically.

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Ash fusion characteristics of biomass pellets during combustion

Cited by 31 publications

References 38 publications

Performance of Corn Cob Combustion in a Low-Temperature Fluidized Bed

Performance of Corn Cob Combustion in a Low-Temperature Fluidized Bed

Significance and Challenges of Poultry Litter and Cattle Manure as Sustainable Fuels: A Review

Analysis of Ash Content on Bagasse Drying Agent and the Effect on Combustion at Sugarcane Mill

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