Influence of phosphorus on ash fouling deposition of hydrothermal carbonization sewage sludge fuel via drop tube furnace combustion experiments

Park, Joo Chang; Namkung, Hueon; Yoon, Sang-Phil; Seo, Hong Seog; Xu, Li-Hua; Kim, Hyung-Taek

doi:10.1016/j.joei.2020.07.014

Cited by 12 publications

(12 citation statements)

References 23 publications

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“…It also causes severe fouling problems in boilers due to alkali and phosphorous contents. 12 Anaerobic digestion of sewage sludge achieves high methane yields in the range of 230−430 Nm 3 CH 4 /ton volatile solid 13 T h i s c o n t e n t i s depending on the pretreatment methods and digestion conditions. However, it requires typically large conversion times leading to high reactor volumes and thus high capital investment.…”

Section: Introductionmentioning

confidence: 99%

“…Due to its high moisture content, typically above 80% wt., the transport and direct combustion of sewage sludge is energetically unfavorable. It also causes severe fouling problems in boilers due to alkali and phosphorous contents . Anaerobic digestion of sewage sludge achieves high methane yields in the range of 230–430 Nm 3 CH 4 /ton volatile solid depending on the pretreatment methods and digestion conditions.…”

Section: Introductionmentioning

confidence: 99%

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Techno-Economic Analysis of the Production of Liquid Biofuels from Sewage Sludge via Hydrothermal Liquefaction

et al. 2022

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This work addresses the process and economic performance of the production of gasoline and diesel range fuels from urban sewage sludge. The overall production route involves direct conversion of the sewage sludge to an intermediate oil phase, so-called biocrude, via hydrothermal liquefaction at near-critical water conditions and further upgrading of the biocrude based on conventional refinery processes. The overall mass and energy yields of combined naphtha and middle distillate from sewage sludge on dry basis are approximately 19 and 60%, where the naphtha fraction represents about 45% of the total, with a minimum fuel selling price ranging between 2.4 and 0.8 €/liter assuming full investment in both the biocrude production and upgrading plant with sewage sludge feed capacities in the range of 3 to 30 dry-ton/day. If existing equipment at refinery can be used for upgrading of the biocrude, the minimum fuel selling price can be reduced by approximately 7%.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Techno-Economic Analysis of the Production of Liquid Biofuels from Sewage Sludge via Hydrothermal Liquefaction

et al. 2022

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“…Therefore, recovery technology of P from sewage is important because it can protect water resources and recover P for other uses. − Recovery systems that use chemical and biological techniques have been developed and applied to sewage treatment systems and can produce solid waste containing a high concentration of P. ,− The sewage sludge generated during the water treatment process usually is incinerated to decrease the volume of waste. The sludge contains a burnable portion derived mainly from organic substances and an unburnable portion derived from minerals. , The unburnable portion forms ash particles during incineration. The ashes are collected by filters placed after the furnace.…”

Section: Introductionmentioning

confidence: 99%

“…The sludge contains a burnable portion derived mainly from organic substances and an unburnable portion derived from minerals. 12,13 The unburnable portion forms ash particles during incineration. The ashes are collected by filters placed after the furnace.…”

Section: ■ Introductionmentioning

confidence: 99%

Role of Phosphorus and Iron in Particle Adhesiveness at High Temperatures Using Synthetic Ashes

Horiguchi

Ito

et al. 2021

ACS Sustainable Chem. Eng.

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During sewage treatment, phosphorus (P) is concentrated in sewage sludge, and the sludge is incinerated to produce P-concentrated ash particles. The P-containing ash particles possess high adhesiveness at high temperatures, which can cause problems for the incineration plants. Phosphorus is considered a key element for inducing ash particles adhesiveness; however, the mechanistic details remain unclear. The present study clarified the role of P in particle adhesion at high temperatures using synthetic ashes, which consist of P and Si. The tensile strength of synthetic ash powder beds was quantified using a specially developed device that could estimate adhesiveness of particles at high temperatures. Since synthetic ash has few components compared to incineration ashes collected from commercial incineration plants, evaluating the role of P is easier. Iron (Fe)-containing chemical species are used for water treatment as chemical conditioners, and Fe also is concentrated with P in the sludge-incinerated ashes. To determine the interactions between Fe and P, iron oxide nanoparticles were added to P-containing synthetic ashes and their adhesiveness was evaluated. A small addition of iron oxide nanoparticles significantly decreased the adhesiveness of P-containing synthetic ashes at high temperatures, information that can help to control adhesiveness of sewage sludge-incinerated ashes.

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“…The phosphorus release from sewage sludge, either reported directly as release or retention in ash, ,,,,, or calculated using data on ash composition, ,,,, in different studies is shown in Figure . Generally, there appears to be no, or only minor, release of phosphorus up to 1100 °C.…”

Section: Transformation Of Phosphorus In Biomass Conversionmentioning

confidence: 99%

Review of Phosphorus Chemistry in the Thermal Conversion of Biomass: Progress and Perspectives

et al. 2023

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Phosphorus is vital for all life, which means that phosphorus is present in all biomass to some extent. Some types of biomass, such as certain agricultural residues, animal biomass, and sewage sludge, contain high levels of phosphorus. In thermal conversion of biomass, high levels of phosphorus can cause various operational problems. Extensive work has been carried out to understand the phosphorus chemistry taking place at higher temperatures. However, until now, knowledge about transformation chemistry and fate of phosphorus during thermal conversion of biomass was not easily accessible in one place. In this work, the outcome of an extensive literature review has been summarized. First, an introduction to the role of phosphorus in biomass, and in what forms it may be present, is given. Different analytical techniques relevant for characterization of phosphorus in biomass, biomass char, and biomass ash are described. A classification of phosphorus-rich biomass is proposed, and the potential of different phosphorus-rich biomass types is presented. To provide a common basis for the field of high-temperature phosphorus chemistry, fundamental chemistry relevant for thermal conversion of biomass is first discussed. This includes the gas phase chemistry and reaction pathways of light phosphorus species, pyrolysis, and combustion of organophosphorus compounds, and solid, liquid, and gaseous interactions with other ash-forming elements. Thereafter, an in-depth review of phosphorus transformations in biomass, including decomposition of organic phosphorus, ash transformations in the condensed phase, release to the gas phase, and formation of particulate matter in the flue gas follows. Finally, the review covers research focusing on phosphorus in different application aspects, such as the use of phosphorus as an additive to mitigate operational problems related to slag and deposit formation, the behavior of phosphorus in fluidized bed technologies, corrosion, and the deactivation of SCR catalysts.

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Influence of phosphorus on ash fouling deposition of hydrothermal carbonization sewage sludge fuel via drop tube furnace combustion experiments

Cited by 12 publications

References 23 publications

Techno-Economic Analysis of the Production of Liquid Biofuels from Sewage Sludge via Hydrothermal Liquefaction

Techno-Economic Analysis of the Production of Liquid Biofuels from Sewage Sludge via Hydrothermal Liquefaction

Role of Phosphorus and Iron in Particle Adhesiveness at High Temperatures Using Synthetic Ashes

Review of Phosphorus Chemistry in the Thermal Conversion of Biomass: Progress and Perspectives

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