Quality evaluation of briquettes made from wood waste

Brožek, Milan; Новакова, А.А.; Kolářová, Mária

doi:10.17221/33/2011-rae

Cited by 30 publications

(26 citation statements)

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“…The tests of briquettes mechanical properties were carried out according to the method used by author during several years for testing of briquettes made from different nonmetallic (Brožek 2001a(Brožek , 2013aBrožek et al 2012) and metallic materials (Brožek 2001b;Brožek, Nováková 2010). The method of operation is relatively sim-ple.…”

Section: Methodsmentioning

confidence: 99%

“…But they engage in other materials than paper waste, primarily in briquettes made from wood waste (Basore 1929;Sheridan, Berte 1959;Brožek et al 2012;Brožek 2013b), from energy plants (Plíštil et al 2004(Plíštil et al , 2005Kakitis et al 2010), or from alternative fuels (Kolářová 2011). Their authors concentrate primarily on energy properties, but not on mechanical properties.…”

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confidence: 99%

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Evaluation of selected properties of briquettes from recovered paper and board

Brožek¹

2015

Res. Agric. Eng.

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Brožek M. (2015): Evaluation of selected properties of briquettes from recovered paper and board. Res. Agr. Eng., 61: 66-71.Worldwide increasing energy demand is today permanently covered by a majority of non-renewable energy sources, namely by coal, crude oil and natural gas. This causes the rapid decline of their reserves and the time gets near when they will be run out. Therefore in the last years the exploitation of renewable energy sources has been permanently preferred. One of alternative fuel forms is fuel on the basis of paper waste. In this paper the results of tests are published, which were carried out using six sorts of recovered paper and board (group and grade 1.05, 1.06, 2.02, 2.05, 2.07 and 2.08 according to CSN EN 643:2002), pressed into the form of briquettes. During the tests following briquettes parameters were watched: moisture content, ash amount, gross calorific value, length and diameter, weight, density, rupture force and mechanical durability. It was proved that briquettes made from recovered paper and board compared with briquettes from wood waste are of high density, high mechanical durability and for their rupture, relatively high force is necessary. But at the same time they have high ash amount and low gross calorific value.

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Section: Methodsmentioning

confidence: 99%

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Evaluation of selected properties of briquettes from recovered paper and board

Brožek¹

2015

Res. Agric. Eng.

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“…Torrefaction of biomass can be described as a mild form of pyrolysis that occurs at temperatures between 200 and 300 o C where a solid uniform product is produced. This product has a very low moisture content, high calorific value (Ustu et al, 2008) and less hydrophilic compared to the untreated biomass to fresh biomass (Brožek et al, 2012). Furthermore, the fibrous and tenacious nature of the biomass is reduced, resulting in a brittle material that can easily be comminuted into smaller particles (Van der Stelt et al, 2011).…”

Section: Review Of Torrefaction Technologymentioning

confidence: 99%

“…The reserves of non-renewable energy sources (coal, crude oil, natural gas) are not limitless, they gradually get exhausted and their price continually increases. Nevertheless, they cover about four fifth of the energy consumption (Brožek et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Production of Solid Fuel by Torrefaction Using Coconut Leaves As Renewable Biomass

Pestaño

Jose

2016

Int. J. Renew. Energy Dev.

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ABSTRACT. The reserves of non-renewable energy sources such as coal, crude oil and natural gas are not limitless, they gradually get exhausted and their price continually increases. In the last four decades, researchers have been focusing on alternate fuel resources to meet the ever increasing energy demand and to avoid dependence on crude oil (Karunanithy et al. 2012). Amongst different sources of renewable energy, biomass residues hold special promise due to their inherent capability to store solar energy and amenability to subsequent conversion to convenient solid, liquid and gaseous fuels. At present, among the coconut farm wastes such as husks, shell, coir dust and coconut leaves, the latter is considered the most grossly under-utilized by in situ burning in the coconut farm as means of disposal. In order to utilize dried coconut leaves and to improve its biomass properties, this research attempts to produce solid fuel by torrefaction using dried coconut leaves for use as alternative source of energy that can be utilized in the indirect drying of coconut meat in the farm-level to produce copra. Torrefaction is a thermal method for the conversion of biomass operating in the low temperature range of 200 o C-300 o C under atmospheric conditions in absence of oxygen. Dried coconut leaves were torrefied at different feedstock conditions. The key torrefaction products were collected and analyzed. Physical and combustion characteristics of both torrefied and untorrefied biomass were investigated. Torrefaction of dried coconut leaves significantly improved the heating value compared to that of the untreated biomass. Proximate compositions of the torrefied biomass also improved and were comparable to coal. The distribution of the products of torrefaction depends highly on the process conditions such as torrefaction temperature and residence time. Physical and combustion characteristics of torrefied biomass were superior making it more suitable for fuel applications.

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“…The waste pressed from flammable materials, e.g. from wood waste (chips, sawdust), straw, coal, paper, cellulose, tobacco etc., is mostly utilized energetically (by combustion) (Basore 1929;Sheridan, Berte 1959;Plíštil et al 2004;Brožek 2011;Brožek et al 2012). After its compression the waste from combustible materials, e.g.…”

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Study of briquette properties at their long-time storage

Brožek¹

2013

J. For. Sci.

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ABSTRACT:The paper presents the results of laboratory tests aimed at the study of storage place, storage manner and storage time in relation to mechanical properties of briquettes made from spruce shavings. A BrikStar 50 briquetting press with a pressure chamber 65 mm in diameter of the Briklis firm was used for the briquette production. All briquettes were made at the constant adjustment of all parameters of the briquetting press. The briquette properties were evaluated by determination of their density and rupture force. Moreover, mechanical durability, gross calorific value, total mois ture and ash content were determined. It follows from the results of tests that at briquette storage in a well closed plastic bag neither place nor storage time influenced significantly their life time. At briquette storage in a net plastic bag various intensive damage to briquettes occurred, mainly depending on their storage place and storage time.Keywords: spruce shavings; gross calorific value; density; rupture force; moisture content Briquetting is a relatively old technology. The first mentions of their use were published in the first half of the 18 th century. Otto's Encyclopaedic Dictionary describes relatively lengthily the basis and the use of briquetting and of briquettes in practice. The mention of briquetting technology and of briquettes can be found in practice in all older as well in new domestic (Stehlík et al. 1966) and foreign encyclopaedias.In the Czech Republic the briquetting technology has also been used in the field of metallic and nonmetallic processing in the last twenty years. The basis of this method is the effect of a high pressure on fine-grained material. Briquettes, most often of cylindrical form and various diameter and length, are the final product. But briquettes can be of various shape, e.g. of cuboid with rounded corners, of hexagonal cuboid etc., according to the design of the press chamber of the used briquetting press. The use of briquetting technology can bring about substantial savings. The waste pressed from flammable materials, e.g. from wood waste (chips, sawdust), straw, coal, paper, cellulose, tobacco etc., is mostly utilized energetically (by combustion) (Basore 1929;Sheridan, Berte 1959;Plíštil et al. 2004;Brožek 2011;Brožek et al. 2012). After its compression the waste from combustible materials, e.g. dust collected on air filters, abrasion dust (Brožek 2007) or chips from the cutting of metals and their alloys [ČSN 42 1331[ČSN 42 (1991; ČSN 42 0030 (1994); Brožek 2009; Brožek, Nováková 2010] is better usable. After compression the waste volume strongly decreases. This makes its handling easy and decreases costs of transport or storage on a waste disposal site. MATERIAL AND METHODSBriquettes from wood waste designed for combustion should meet a number of requirements which are defined in relevant national directives. In the Czech Republic the requirements on briquette properties are laid down by Directive No. 14-2009 of Ministry of Environment of the Czech Republic: Briquettes f...

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Quality evaluation of briquettes made from wood waste

Cited by 30 publications

References 1 publication

Evaluation of selected properties of briquettes from recovered paper and board

Evaluation of selected properties of briquettes from recovered paper and board

Production of Solid Fuel by Torrefaction Using Coconut Leaves As Renewable Biomass

Study of briquette properties at their long-time storage

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