Prediction of heating values of biomass fuel from elemental composition

Friedl, Anton; Padouvas, Emmanuel; Rotter, H.; Вармуза, Курт

doi:10.1016/j.aca.2005.01.041

Cited by 674 publications

(325 citation statements)

References 15 publications

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“…The higher heating value (HHV) and chemical exergy (e ch ) of the initial material and torrefied material was calculated using correlations that take into account the ultimate analysis (C, H, N, O and S) in dry basis, following to Friedl et al (2005) and Kotas (1995), respectively (Eqs. 1, 2, and 3).…”

Section: Heating Value and Chemical Exergymentioning

confidence: 99%

Effect of torrefaction temperature on properties of Patula pine

Ramos-Carmona

Pérez

Peláez-Samaniego

et al. 2017

Maderas, Cienc. tecnol.

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The objective of this work was to study the effect of torrefaction temperature on properties of patula pine (Pinus patula) wood that could be of interest for further thermochemical processing. Torrefaction temperature was varied from 200 to 300 °C for 30 minutes using a batch spoon type reactor. Raw and torrefied materials were characterized for proximate and ultimate analyses, thermogravimetry, and pyrolysis gas chromatography/mass spectrometry (Py-GC/MS). Results showed that torrefied pine has greater higher heating value and chemical exergy due to the reduction of O/C and H/C ratios. Compared with raw biomass, the material torrefied at 200 and 250 °C did not present significant changes in chemical composition and thermal behavior. Conversely, material torrefied at 300 °C did show important changes in both chemical composition and thermal behavior. Py-GC/MS results suggested that the main constituents of biomass, i.e., hemicellulose, cellulose and lignin, suffer a progressive thermal degradation with increase in torrefaction temperature.

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Section: Heating Value and Chemical Exergymentioning

confidence: 99%

Effect of torrefaction temperature on properties of Patula pine

Ramos-Carmona

Pérez

Peláez-Samaniego

et al. 2017

Maderas, Cienc. tecnol.

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“…The heating value is an important parameter for the planning and the control of power plants using biomass. It may be defined as the enthalpy of complete combustion of a fuel with, for instance, all carbon converted to CO 2 and all hydrogen converted to H 2 O (Friedl et al 2005).…”

Section: Fig 3 Proximate and Ash Analysis Of The Wastes (Standard Dmentioning

confidence: 99%

“…Several researchers have stated that elemental analyses may also be vital for biomass classification due to its high correlation with heating values (Yin 2010;Friedl et al 2005;Sheng and Azevedo 2005). The density of lignocellulosic wastes is also very important for bioenergy production, since it establishes a relation between the mass and volume of the byproducts, considering the voids that certainly will influence the energetic yield of a material.…”

Section: Introductionmentioning

confidence: 99%

Brazilian Lignocellulosic Wastes for Bioenergy Production: Characterization and Comparison with Fossil Fuels

et al. 2013

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The aim of this paper was to analyze energy-related properties of forestry and agricultural wastes for energy production purposes, and to compare them with fossil fuels. The forestry wastes used were red cedar, Eucalyptus, and Pinus wood shavings. The agricultural wastes analyzed were rice husk, coffee wastes, sugar cane bagasse, maize harvesting wastes, and bamboo cellulose pulp. The forestry wastes presented more suitable properties for bioenergy production than the agricultural wastes. Desirable energetic properties were found for coffee wastes. The opposite was verified for rice husks. Among the biomass studied, coffee wastes presented the highest equivalent in fossil fuel volume and hence may lead to the highest decrease in CO 2 emissions by fossil fuels used in Brazil for steam and heat production. The results suggests that CO 2 benefits can be obtained if bioenergy is generated in the same locale where biomass is produced, avoiding CO 2 cost of logistics and leading to greater end-use efficiency. The present work promotes the widespread use of different lignocellulosic wastes for bioenergy production and gives useful information for the planning and the control of power plants using biomass.

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“…The higher heating value (HHV) of the raw and torrefied biomasses was determined by the correlation proposed by Friedl et al (2005) and shown in Eq. 7.…”

Section: Lower Heating Valuementioning

confidence: 99%

Physicochemical Characterization of Torrefied Wood Biomass under Air as Oxidizing Atmosphere

Ramos-Carmona¹,

Delgado-Balcázar²,

Pérez³

2017

BioResources

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The effects of torrefaction under an oxidizing atmosphere on the physicochemical properties of patula pine wood chips were studied. Raw and torrefied pine were characterized to evaluate the effect of temperature and residence time on biofuel properties, such as bulk density, equivalent Hardgrove grindability index (HGIeq), ultimate and proximate analyses, heating value, and fuel value index (FVI). In contrast, the torrefaction process was characterized by mass and energy yields, and by the energymass co-benefit index (EMCI). Torrefaction was performed in a rotary kiln at temperatures between 180 °C and 240 °C during residence times between 30 min and 120 min. The torrefaction process under an oxidizing atmosphere tended to increase the fixed carbon/volatile matter ratio (from 0.19 to 2.5), while the H/C and O/C atomic ratios decreased 73% and 55%, respectively. The best properties of wood reached in the experimental plan were obtained at 210 °C during 75 min. For this torrefaction condition, energy yield, FVI, and EMCI were 85.91%, 1.91 MJ/cm 3 , and 4.41%, respectively. Additionally, the lower heating value for torrefied pine (18.65 MJ/kg) was higher than for the raw material (17.76 MJ/kg), and the HGIeq was 17% greater, which resulted in a better grindability behavior.

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Prediction of heating values of biomass fuel from elemental composition

Cited by 674 publications

References 15 publications

Effect of torrefaction temperature on properties of Patula pine

Effect of torrefaction temperature on properties of Patula pine

Brazilian Lignocellulosic Wastes for Bioenergy Production: Characterization and Comparison with Fossil Fuels

Physicochemical Characterization of Torrefied Wood Biomass under Air as Oxidizing Atmosphere

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