Fate of phosphorus in pulverized fuel co-combustion of sewage sludge and agricultural residues

Häggström, Gustav; Hannl, Thomas Karl; Holmgren, Per; Broström, Markus; Skoglund, Nils; Öhman, Marcus

doi:10.1016/j.fuel.2022.127059

Cited by 2 publications

(2 citation statements)

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“…To tackle these ash-related problems, technologies including fuel pretreatments, using additives, and fuel co-combustion are proposed [12][13][14]. Among them, the co-combustion of different biomass fuels such as wood and straw has been practiced [11], taking advantages of the positive interactions in the ash formation and behavior of the different fuels [15]. During pulverized fuel combustion, complex interactions occur among ash forming components, affecting ash formation and behavior.…”

Section: Introductionmentioning

confidence: 99%

“…Extensive studies have been conducted to investigate the interactions of ash formation and especially submicron ash formation during pulverized biomass combustion [27,28] and biomass co-firing with coal [29,30]. In contrast, few studies have specifically addressed the interactions of ash formation during the pulverized fuel co-combustion of biomass fuels [15]. The objective of the present work was to investigate ash formation during the pulverized fuel co-combustion of agricultural residues with other biomass.…”

Section: Introductionmentioning

confidence: 99%

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Ash Formation and Associated Interactions during Co-Combustion of Wheat Straw and Sewage Sludge

Shan,

Zhou,

Sheng

2024

Energies

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The aim of the present work was to investigate ash formation and associated interactions during the pulverized fuel co-combustion of biomass fuels. Combustion experiments were carried out with narrowly sized wheat straw (WS), sewage sludge (SS), and their blends in a drop tube furnace at 1100 °C and 1300 °C. The resulting residual ash and fine particulate matter (PM10) were characterized with various analyses. It was observed that co-combustion influences size distributions of the residual ash particles and generally generates larger residual ash particles close to those of SS combustion. The interaction of K capture by minerals enhances the melting and consequently increases the production of large and melting ash particles during co-combustion. It was found that blending SS with WS has not only the positive interaction of K capture by minerals from SS ash to significantly reduce submicron ash formation, but also the positive interaction of transforming alkali chlorides into alkali sulfates to reduce the corrosiveness of submicron ash particles. Co-combustion of SS with WS can also reduce the presence of alkali chloride at PM1–10, lowering the propensities of deposition and corrosion of the fine residual ash particles.

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