Fuel characterization and biomass combustion properties of selected native woody shrub species from central Portugal and NW Spain

Viana, Hélder; Vega-Nieva, Daniel José; Ortiz, Luis; Lousada, J.; Aranha, José

doi:10.1016/j.fuel.2012.06.035

Cited by 66 publications

(53 citation statements)

References 29 publications

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“…The percentage of ash is 2% and these values are very similar to those obtained by other researchers for other types of waste pellet, such as agricultural waste, cork pellets have a lower percentage of ash (e.g., 5.27% for rye straw, 7.02% for wheat straw and 20.3% for rice husk) [31].…”

Section: Resultssupporting

confidence: 88%

Production and Characterisation of Cork Pellets: An Alternative for Sustainable Energy Recovery

Nunes¹,

Matias²,

Catalão³

2014

REPQJ

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Abstract.The cork industry presents itself as one of the most entrepreneurial in the Portuguese industrial sector, contributing significantly to the increase of exports. However, it is an industry in which the use of raw materials is maximised leaving a large volume of waste. The cork industry has tried to take advantage of these residues, mainly through direct energy recovery, despite the technical and safety difficulties presented by the use of such low density material, which complicates and hinders its transportation for industrial uses outside the area in which it is produced. The densification process opens new doors for such use and also for its storage, because it produces better results when compared with other more common products, such as wood sawdust or even forest and agricultural waste. Thus, cork pellets emerge as a safer and more easily transportable alternative for energy recovery from cork dust and other granulated types of cork waste, which offer the prospects for wider use. The results demonstrate that cork pellets have higher calorific value when compared with other biomass pellets; typically, approximately 19 MJ/kg with 2% volume of ashes, which is equivalent to that obtained from the combustion of pellets produced from combined forest and agricultural waste with a bulk density of 640 kg/m 3 , which offers real advantages in terms of logistics.

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Section: Resultssupporting

confidence: 88%

Production and Characterisation of Cork Pellets: An Alternative for Sustainable Energy Recovery

Nunes¹,

Matias²,

Catalão³

2014

REPQJ

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“…The ash-fusion temperatures, indicator of slagging tendency in gasification/ combustion systems, were measured in laboratory in reducing atmosphere in accordance with the microscope-photograph method CEN/TS 15404:2006 [21].…”

Section: Dried Sewage Sludge Propertiesmentioning

confidence: 99%

Influence of Wastewater Treatment and The Method of Sludge Disposal on the Gasification Process

Werle

Dudziak

2014

Ecological Chemistry and Engineering S

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Abstract:Municipal wastewater treatment results in the production of large quantities of sewage sludge, which requires proper environmentally accepted management before final disposal. Sewage sludge is a by-product of current wastewater treatment technologies. Sewage sludge disposal depends on the sludge treatment methods used in the wastewater treatment plant (anaerobic or aerobic digestion, drying, etc.). Taking into consideration presented given this information, a study concerning the effects of wastewater treatment processes and sewage sludge drying method on the sewage sludge gasification gas parameters was performed. Gasification is a prospective alternative method of sludge thermal treatment. For the purpose of experimental investigations, a laboratory fixed bed gasifier installation was designed and built. Two types of sewage sludge feedstock, SS1 and SS2, were analyzed. Sewage sludge SS1 came from a wastewater treatment plant operating in the mechanical and biological system while sewage sludge SS2 was collected in a mechanical, biological and chemical wastewater treatment plant with simultaneous phosphorus precipitation. The sludge produced at the plants was subject to fermentation and then, after being dehydrated, dried in a cylindrical drier on shelves heated up to 260ºC (sewage sludge SS1) and using hot air at a temperature of 150ºC in a belt drier (sewage SS2). The analysis shows that the sewage sludge properties strongly depend on the wastewater sources and the wastewater treatment processes. The gasification results, presented as a function of the amount of gasification agent, show that the greater oxygen content of SS1 caused a reduction in the reaction temperature. Paradoxically, this effect caused an increase in the quantity of combustible components in the gas. As expected, increasing the air flow rate caused a decrease in the heating value of the gas produced. A higher amount of oxidizer increases the amounts of noncombustible species and the volumetric fraction of nitrogen, thus reducing the heating value of the obtained gas. The higher hydrogen content in SS1 affects the gasification gas composition. As a result, combustible components are the majority of the syngas.

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“…In the region of Galicia, NW Spain, where most of the E. globulus in the country is growing, plantations of this species comprise 20 % of the total forest area (DGCN 2012), providing with about of 60 % to the timber yield in the region. As well as its traditional use for pulpwood, this species is increasingly being utilized as a bioenergy feedstock for renewable heat and electricity production in Spain and Portugal (Vega-Nieva et al 2008;Viana et al 2010Viana et al , 2012Pérez-Cruzado et al 2011), mainly through the combustion of harvesting debris and bark. There is also a growing interest in the utilization of the exhausted coppice root system as a biomass feedstock.…”

Section: Introductionmentioning

confidence: 99%

Modeling the above and belowground biomass of planted and coppiced Eucalytpus globulus stands in NW Spain

Vega-Nieva

Valero

Picos

et al. 2015

Annals of Forest Science

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Fuel characterization and biomass combustion properties of selected native woody shrub species from central Portugal and NW Spain

Cited by 66 publications

References 29 publications

Production and Characterisation of Cork Pellets: An Alternative for Sustainable Energy Recovery

Production and Characterisation of Cork Pellets: An Alternative for Sustainable Energy Recovery

Influence of Wastewater Treatment and The Method of Sludge Disposal on the Gasification Process

Modeling the above and belowground biomass of planted and coppiced Eucalytpus globulus stands in NW Spain

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