Effect of oxy-fuel combustion on ash deposition of pulverized wood pellets

Al-Qayim, Khalidah; Nimmo, W.; Hughe, Kevin J.; Pourkashanian, Mohamed

doi:10.18331/brj2019.6.1.4

Cited by 9 publications

(3 citation statements)

References 18 publications

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“…The main constituents of corn cob ash were K 2 O-56.03% and SiO 2 -31.02%. The same distribution of K 2 O and SiO 2 was in [43]; respectively, it was determined from 23.4% to 58.11% and from 13.4% to 37.58%. The presence of alkaline oxide in large amounts within the ash content plays a crucial role in the uninterrupted operation of a biomass gasifier or combustor [44].…”

Section: Chemical Composition Of Raw Materialssupporting

confidence: 54%

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 Materialssupporting

confidence: 54%

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

Paulauskas,

Praspaliauskas,

Ambrazevičius

et al. 2024

Energies

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“…in contrast to the exclusive use of fossil fuels (Loo and Koppejan 2008;Vasileiadou et al 2021a). MSW is a source of biomass; therefore, it is renewable (Al-Qayim et al 2019). Coal cocombustion of biomass residues/wastes reduces greenhouse gas emissions, since landfilling is avoided (CH 4 is known to have a much higher global warming impact than CO 2 ).…”

Section: Introductionmentioning

confidence: 99%

A comprehensive experimental study of municipal solid waste (MSW) as solid biofuel and as composite solid fuel in blends with lignite: quality characteristics, environmental impact, modeling, and energy cover

Vasileiadou

Zoras

Dimoudi

2023

Energ. Ecol. Environ.

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Recently, coal power plants across Europe have been reopened. Alternative fuels are needed for energy autonomy purposes, for a smoother transition to the post-lignite era and for sustainable development. In this work, different categories of municipal solid wastes (MSW) and their blends with lignite were studied for their potential use as alternative fuels. Seventeen samples were studied using several techniques: gross calorific value (GCV), proximate analysis, ultimate analysis, ion chromatography, ash elemental analysis, thermogravimetric analysis, kinetic modeling and thermodynamic analysis. A determination of empirical chemical formulas was performed. Slagging/fouling potential was evaluated with various indices including modified indices that take into account ash production and GCV. Maximum emission factors were calculated and defined per produced MJ. Also, an environmental footprint index was developed regarding the environmental impact of solid wastes. The GCV experimental results were compared with those of twenty different empirical models. Moreover, several case studies were performed to evaluate the potential of covering the energy demands, with combustion of MSW, in Greece and Europe. The results showed that MSW as a primary/secondary fuel is an attractive solution considering the fact that it boasts better characteristics in comparison with lignite. Moreover, the environmental footprint index (EFIsw) of the MSW revealed a much smaller environmental impact. The high N content is not always translated to high emissions if NO is expressed per produced MJ (gNO/MJ). In addition, MSW can also be used as a significant contributor in covering energy demands regarding the energy recovery potential. Graphical abstract

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“…Pellet biomass can be a possible solution for green-house gas emission due to fossil fuels usage [Min & Um, 2017]. Compared to coal, pellets (biomass) had less carbon, NO 2 , and SO 2 emission [Al-Qayim et al, 2019]. Since 2011, the demand for pellets has grown rapidly [Thrän et al, 2017].…”

Section: Introductionmentioning

confidence: 99%

Utilizing Merbau Wood and Coconut Shell Wastes as Biofuel in the Form of Pellets

Prasetyadi¹,

Sutapa²

2023

J. Ecol. Eng.

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The wood waste generated by wood industries is increasing. On the other hand, the demand for bioenergy in the form of pellets is also rapidly increasing. Converting wood waste into wood pellets can be one of the alternatives of waste management. At the same time, improving pellets quality can be implemented to keep up with the increasing pellets demand. This study investigated the characteristics of merbau (Intsia bijuga) wood and coconut (Cocos nucifera) shell wastes pellets, and effects of material combination pellets characteristics. The results showed that merbau wood and coconut shell wastes pellets proved to meet the DIN EN 15270 pellet quality standard. Moreover, a significant improvement on merbau pellets proximate properties and calorific value was investigated; however, the crush strength of pellets was significantly decreased.

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Effect of oxy-fuel combustion on ash deposition of pulverized wood pellets

Cited by 9 publications

References 18 publications

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

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

A comprehensive experimental study of municipal solid waste (MSW) as solid biofuel and as composite solid fuel in blends with lignite: quality characteristics, environmental impact, modeling, and energy cover

Utilizing Merbau Wood and Coconut Shell Wastes as Biofuel in the Form of Pellets

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