Fluidized bed gasification of waste-derived fuels

Arena, Umberto; Zaccariello, Lucio; Mastellone, Maria Laura

doi:10.1016/j.wasman.2010.01.038

Cited by 165 publications

(95 citation statements)

References 13 publications

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“…Arena et al [57] reported that olivine is an effective in situ tar reduction agent when plastic waste is gasified. The iron and magnesium contained in the olivine can activate the endothermic tar decomposition reactions [58]. Iron catalytically enhances dehydrogenation and carbon formation reactions (eq.…”

Section: G/mol) To Benz[a]anthracene (M ≈ 22829 G/mol)mentioning

confidence: 99%

“…Table 5 also reports the ratio between the mass flow rate of each element that escapes from the gasifier as fines and that which remains in the reactor as the inorganic fraction of the fuel (Q i,fines /Q i,fuel ), as well as the enrichment factor EF in the elutriated fines. According to Arena et al [58], when olivine provides a significant catalytic activityfor tar cracking and carbonization, the fines collected in the cyclone contain substantially larger quantities of iron than those remaining in the reactor with fuel; consequently they observed values of Q Fe, fines /Q Fe, fuel significantly larger than 1, typically 100 or more. The results presented in Table 5 for the gasification of cardoon suggest that Q Fe, fines /Q Fe, fuel is 0.34 for magnesite and 0.41 for olivine and it is increasing with temperature (data not presented).…”

Section: G/mol) To Benz[a]anthracene (M ≈ 22829 G/mol)mentioning

confidence: 99%

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Cynara cardunculus L. gasification in a bubbling fluidized bed: The effect of magnesite and olivine on product gas, tar and gasification performance

Serrano

Kwapińska

Horvat

et al. 2016

Fuel

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Gasification of Cynara cardunculus L. was performed in a bubbling fluidized bed (BFB) using air as the gasifying agent and magnesite and olivine as different bed materials. Temperature was varied during the experiments (700-800 ºC) with fixed biomass feeding and air flow rates.The effect of using the magnesite and olivine on the gas and tar composition, carbon and biomass conversion, and cold gas efficiency was investigated. The product gas showed high hydrogen content (13-16 %v/v) for both magnesite and olivine in the temperature range studied.Higher heating value and gas yield were improved with increasing the temperature from 700 to 800 ºC. Biomass and carbon conversion were greater than 75%, giving values higher than 90 % for both 700 and 800 ºC in magnesite and for 800 ºC in olivine. Indane and cresols were the main tar compounds at low temperature while naphthalene was the dominant tar species at the high temperatures. Gasification performance was better with magnesite at 700 ºC while olivine showed better properties at 800 ºC.

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Section: G/mol) To Benz[a]anthracene (M ≈ 22829 G/mol)mentioning

confidence: 99%

Section: G/mol) To Benz[a]anthracene (M ≈ 22829 G/mol)mentioning

confidence: 99%

Cynara cardunculus L. gasification in a bubbling fluidized bed: The effect of magnesite and olivine on product gas, tar and gasification performance

Serrano

Kwapińska

Horvat

et al. 2016

Fuel

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“…A generic fluidized bed reactor was modeled based on existing pilot plants (32,(55)(56)(57). The main parameters modeled were: cold gas and carbon conversion efficiency (CGE and CCE), energy content of the syngas and energy consumption of the plants.…”

Section: Gasificationmentioning

confidence: 99%

Bioenergy Production from Perennial Energy Crops: A Consequential LCA of 12 Bioenergy Scenarios including Land Use Changes

Tonini

Hamelin

Wenzel

et al. 2012

Environ. Sci. Technol.

105

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In the endeavor of optimizing the sustainability of bioenergy production in Denmark, this consequential life cycle assessment (LCA) evaluated the environmental impacts associated with the production of heat and electricity from one hectare of Danish arable land cultivated with three perennial crops: ryegrass (Lolium perenne), willow (Salix viminalis) and Miscanthus giganteus. For each, four conversion pathways were assessed against a fossil fuel reference: I) anaerobic co-digestion with manure, II) gasification, III) combustion in small-to-medium scale biomass combined heat and power (CHP) plants and IV) co-firing in large scale coal-fired CHP plants. Soil carbon changes, direct and indirect land use changes as well as uncertainty analysis (sensitivity, MonteCarlo) were included in the LCA. Results showed that global warming was the bottleneck impact, where only two scenarios, namely willow and Miscanthus co-firing, allowed for an improvement as compared to the reference (-82 and -45 t CO 2 -eq. ha -1 , respectively). The indirect land use changes impact was quantified as 310 ±170 t CO 2 -eq. ha -1 , representing a paramount average of 41% of the induced greenhouse gas emissions. The uncertainty analysis confirmed the results robustness and highlighted the indirect land use changes uncertainty as the only uncertainty that can significantly change the outcome of the LCA results.3

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“…However, there are many parameters that affect the gasification products, such as gasifying agents and steam to feedstock ratio, or the equivalent ratio of air. Many reports have shown their effects on gasification (Kumar et al 2009;Arena et al 2010;Wang et al 2010;Han et al 2013). For steam gasification, temperature is another important factor (Li et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Effects of Metal Salt Catalysts on Fluidized Bed Gasification Characteristics of Source-Collected Combustible Solid Waste

Fan

et al. 2016

BioResources

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Effects of metal salt catalysts and gasification temperature on the gasification characteristics of combustible solid waste were studied, based on the source-classified waste in a fluidized bed gasifier, to provide guidance for utilizing the source-classified waste effectively. The results showed that the gasification characteristics of combustible solid waste, such as paper and sawdust, improved noticeably after adding NaCl, K2CO3, or sodium dodecyl benzene sulfonate (LAS). Adding NaCl to sawdust increased the yield of CO and CH4, while the gasification was inhibited gradually with increasing addition. Adding NaCl promoted the generation of H2 in paper gasification. NaCl played a catalytic role only when it exceeded a certain value. Adding K2CO3 increased the yield of H2 noticeably in sawdust and paper gasification. The catalytic effect of K2CO3 on sawdust was better than that on paper. Similar results were obtained for LAS in producing H2 in gasification. The carbon conversion efficiency and the gasification efficiency were increased with additional LAS. Moreover, the catalytic effect of K2CO3 was superior to that of LAS by comparison. As the temperature rises, the activity of the metal salt catalyst is enhanced, but it is inhibited if the temperature is too high.

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Fluidized bed gasification of waste-derived fuels

Cited by 165 publications

References 13 publications

Cynara cardunculus L. gasification in a bubbling fluidized bed: The effect of magnesite and olivine on product gas, tar and gasification performance

Cynara cardunculus L. gasification in a bubbling fluidized bed: The effect of magnesite and olivine on product gas, tar and gasification performance

Bioenergy Production from Perennial Energy Crops: A Consequential LCA of 12 Bioenergy Scenarios including Land Use Changes

Effects of Metal Salt Catalysts on Fluidized Bed Gasification Characteristics of Source-Collected Combustible Solid Waste

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