Characterization of refuse-derived char from municipal solid waste

Vassilev, Stanislav V.; Braekman-Danheux, C.; Laurent, Philippe

doi:10.1016/s0378-3820(99)00017-x

Cited by 49 publications

(17 citation statements)

References 25 publications

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“…When comparing the intensity peak of coal gangue and brick, the specific peak of pyrite and calcite disappeared, indicating that pyrite and calcite are decomposed completely during firing. Many studies confirmed that iron group (i.e., Cr, Ni, Co) and chalcophile elements (i.e., Cu, Zn, As, Se, Pb and Hg) in coal gangue are predominantly associated with carbonate and sulfide minerals2324252627. It is reported that the transformation behaviors of trace elements are related to various factors, i.e., physic-chemical properties of trace element, stability of their host minerals, combustion temperature and devices282930.…”

Section: Resultsmentioning

confidence: 97%

The Environmental Geochemistry of Trace Elements and Naturally Radionuclides in a Coal Gangue Brick-Making Plant

Zhou

Liu

Cheng

et al. 2014

Sci Rep

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An investigation focused on the transformation and distribution behaviors of trace elements and natural radionuclides around a coal gangue brick plant was conducted. Simultaneous sampling of coal gangue, brick, fly ash and flue gas were implemented. Soil, soybean and earthworm samples around the brick plant were also collected for comprehensive ecological assessment. During the firing process, trace elements were released and redistributed in the brick, fly ash and the flue gas. Elements can be divided into two groups according to their releasing characteristics, high volatile elements (release ratio higher than 30%) are represented by Cd, Cu, Hg, Pb, Se and Sn, which emitted mainly in flue gas that would travel and deposit at the northeast and southwest direction around the brick plant. Cadmium, Ni and Pb are bio-accumulated in the soybean grown on the study area, which indicates potential health impacts in case of human consumption. The high activity of natural radionuclides in the atmosphere around the plant as well as in the made-up bricks will increase the health risk of respiratory system.

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Section: Resultsmentioning

confidence: 97%

The Environmental Geochemistry of Trace Elements and Naturally Radionuclides in a Coal Gangue Brick-Making Plant

Zhou

Liu

Cheng

et al. 2014

Sci Rep

View full text Add to dashboard Cite

show abstract

“…This result was explained by the formation of the less aggressive K 2 SO 4 , according to the same route shown in Eq. (19). This reaction is accompanied by the formation of a compact scale consisting of FeSO 4 which reduces the mass gain at high temperatures.…”

Section: The Role Of Sulfurmentioning

confidence: 96%

“…The addition of SO 2 (g) to the burning atmosphere led to the formation of K 2 SO 4 according to Eq. (19) whereas the addition of HCl shifted this accelerated corrosion of the superheater tubes by the reaction shown in Eq. (12).…”

Section: The Role Of Sulfurmentioning

confidence: 98%

“…In this regard, the sulfation reaction shown in Eq. (19) could be explored to reduce the corrosion rate of superheater tubes consisting of stainless steels.…”

Section: The Role Of Sulfurmentioning

confidence: 99%

“…Inorganic elements such as N, P, K, Ca, Mg, Na, Si, S and Cl are always present. Heavy metals such as cadmium and lead can also be found as trace elements [19]. Biomass fuels such as straw are rich in alkali metals (K and Na) which are mainly present as simple salts and organic compounds [20] and chlorine.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Corrosion in biomass combustion: A materials selection analysis and its interaction with corrosion mechanisms and mitigation strategies

2013

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Waste pyrolysis and generation of storable char

Ryu

Sharifi

Swithenbank

2007

Int. J. Energy Res.

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SUMMARYSustainable cities require the generation of energy from waste that cannot be economically reused or recycled. This study focuses on slow pyrolysis that can generate a high yield of char along with liquid and gas products from waste. Char is high in energy content, storable and transportable with low cost so that it can be used as an intermediate medium for high efficiency energy conversion.Pre-processed municipal waste pellets, wood and grass were pyrolysed in a batch type reactor for a final temperature ranging from 350 to 7008C, and the char products were characterized. The mass yields of char ranged from 55 to 20% for the tested temperature range, recovering 70-30% of energy and 62-30% of carbon in the raw material. The gross calorific value of char was 30-35 MJ kg À1 on a dry ash free basis. The ash content of raw materials was a key parameter for the quality of char, since its proportion increased by 2-4 times in char depending on the mass yield. A significant amount of volatile metals such as Hg, As and Pb in the waste sample was evaporated at 5008C. Therefore, evaporation of volatile metals was another important parameter in determining the pyrolysis temperature and fuel residence time. The char did not show significant morphological change in the tested range of temperatures. It was concluded that slow pyrolysis of waste for char production should be performed below 5008C in order to increase the energy yield and also to reduce the evaporation of heavy metals.

show abstract

Characterization of refuse-derived char from municipal solid waste

Cited by 49 publications

References 25 publications

The Environmental Geochemistry of Trace Elements and Naturally Radionuclides in a Coal Gangue Brick-Making Plant

The Environmental Geochemistry of Trace Elements and Naturally Radionuclides in a Coal Gangue Brick-Making Plant

Corrosion in biomass combustion: A materials selection analysis and its interaction with corrosion mechanisms and mitigation strategies

Waste pyrolysis and generation of storable char

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