Evaluation of selected physical and mechanical properties of briquettes produced from cones of three coniferous tree species

Gendek, Arkadiusz; Aniszewska, Monika; Malaťák, Jan; Velebil, Jan

doi:10.1016/j.biombioe.2018.07.025

Cited by 69 publications

(50 citation statements)

References 30 publications

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“…This was further confirmed by Taulbee et al [96], who suggested that the strength of briquettes is improved when the density is increased. Gendek et al [84] also reported a strong correlation between density and compressive strengths in briquettes made of crushed pine, spruce and larch cones. However, the study noted a certain inconsistency with pine cone due to low compressive strength and assumed that it might be due to the contents of lignin and cellulose or resin content.…”

Section: Correlation Between Density and Some Briquette Propertiesmentioning

confidence: 93%

“…Apart from shatter index, it is another index used to assess briquette's ability to be handled, packed and transported. The strength of briquettes depends on factors such as particle size, moisture content, compaction parameters and material type [84]. Table 3 and Figure 5 shows that the values for compressive strength of briquettes ranged from 10.26 to 22.33 MPa and are significantly different (p < 0.05) as assessed by ANOVA (Table 4).…”

Section: Compressive Strengthmentioning

confidence: 97%

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Production and Characterization of Hybrid Briquettes from Corncobs and Oil Palm Trunk Bark under a Low Pressure Densification Technique

et al. 2020

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The objective of this research was to investigate the quality of hybrid briquettes developed from corncobs (CC) and oil palm trunk bark (OPTB) under a low-pressure densification technique. The materials were combined in varying ratios of CC to OPTB (100:0, 75:25, 50:50, 25:75, 0:100) and wastepaper pulp (10% by weight) was added to each mixture as a binder. The briquettes were produced using a manually operated 20-tonne hydraulic piston press at 28 °C temperature and ≤7 MPa compaction pressure. The mechanical strength of the briquettes was determined by the drop test and compression test methods, while a bomb calorimeter was used to determine the calorific values. The results showed that the physical properties of hybrid briquettes ranged from 9.24–10.00% moisture content, 0.38–0.40 g/cm3 density, and 87.60%–92.00% water resistance. Mechanical strength showed a 98.28%–99.08% shatter index and 18.47–21.75 MPa compressive strength, while calorific values ranged from 16.54–16.91 MJ/kg. The hybrid briquettes fared better than the CC briquettes. The significance of this study lies in the production of briquettes with suitable physical, mechanical and thermal properties by utilizing OPTB which have hitherto not been used, mixed with corncobs. This could bring substantial environmental and socio-economic benefits to rural communities of the developing countries.

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Section: Correlation Between Density and Some Briquette Propertiesmentioning

confidence: 93%

Section: Compressive Strengthmentioning

confidence: 97%

Production and Characterization of Hybrid Briquettes from Corncobs and Oil Palm Trunk Bark under a Low Pressure Densification Technique

et al. 2020

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“…A characteristic feature of such material is its inhomogeneity. In addition to "pure" wood, it contains considerable amounts of bark, conifer needles, and non-lignified shoots (Gendek et al 2018a). Forest residues are generated during the harvesting of timber, as well as during forest tending treatments such as cleanings and thinnings (Moskalik et al 2013(Moskalik et al , 2016.…”

Section: Introductionmentioning

confidence: 99%

Forest residues as a renewable source of energy: Elemental composition and physical properties

Nurek

Gendek

Roman

2018

BioRes

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Forest residues are a potentially important source of renewable energy. They are generated as a byproduct of timber harvesting around the world. To optimize the utilization of such biomass, one must know its physical and chemical properties. This paper presents an analysis of comminuted forest residues from Pinus sylvestris L. They were classified into four size fractions for which three density parameters were established pursuant to relevant standards. The mean bulk density of the fractions amounted to 110 to 190 kg/m3, apparent density 725 to 908 kg/m3, and specific density 1111 to 1350 kg/m3. The findings were compared to the results of previous research on other forms of forest biomass. The measured apparent-to-specific density conversion coefficient was β = 0.64. The elementary composition of forest residues measured in this work differed from that of other biomass types described in literature. In terms of carbon, nitrogen, sulfur, oxygen, and ash content, statistical analysis showed that the two compared types of biomass (forest residues and energy wood chips) formed two separate homogeneous groups, while both of these materials constituted one homogeneous group in the case of hydrogen content. The calorific value of the forest residues was 15.78 ± 0.39 MJ/kg.

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“…Although this last briquettes density value can be accepted under certain standards (where it is indicated to be between 1000 kg·m −3 and 1400 kg·m −3 for DIN 51731 standard or be over 500 kg·m −3 for SS187120 and ISO 17225-2 standards), the mechanical durability index falls below the acceptability criteria (97%) in some of the standards consulted (DIN 51731 and ISO 17225-2). Despite the fact that many authors consider that durability and density are not correlated [25], there are studies that have found that factors which improve durability, and density and strength may be the same without the implication of a positive correlation [11].…”

Section: Discussionmentioning

confidence: 98%

“…Its high cellulose content ranges between 46% and 59% (hemicellulose values between 68.1% and 74.7% [9]) as well as lignin values between 22% and 34% [10].Different works have tried to characterize different sources of biomass, given its great diversity and different properties. Among these are those who have evaluated briquettes from a single source, such as Castellano et al, who evaluated their mechanical durability index and agglomeration processes measured by scanning electron microscopy (SEM) [5] or different coniferous species [11]. In another study the preparation and characterization of the solid fuel briquette, made of rice straw and rice bran, were researched.…”

mentioning

confidence: 99%

Experimental Study on the Mechanical Properties of Biomass Briquettes from a Mixture of Rice Husk and Pine Sawdust

2020

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In search of guaranteeing global energy requirements, waste from different agricultural, forestry and industrial sources is presented as a renewable and sustainable energy source. The manufacture of solid fuels from biomass based on the densification of this to improve its mechanical and energy properties is one of the mechanisms of viable energy production from the technical-economic point of view. The biomass mixture is one of the topics currently researched, in which various factors can affect the final behavior of the briquettes. In this research the influence on the mechanical properties of briquettes obtained from the mixture between two biomasses is studied: rice husk and pine sawdust. A mixed factorial experimental factorial design is used, in which the process temperature, the proportion of the rice husk biomass over the total mass, and the compaction time are defined as experimental factors. Experimental statistical models are obtained that partially explain the behavior of several responses that characterize the mechanical properties of the briquettes based on the selected independent parameters. It was found that the mechanical durability of the briquettes is higher than 97.5%, meets the existing standards, like German Institute for Standardization (DIN) 51731, Theological Institute Batista Ebenézer (ITEBE) SS187120 or International Organization for Standardization (ISO) 17225-2, for a compaction temperature of 110 °C and a proportion of rice husk that does not exceed 60% of the total biomass mixture in the briquette. The compaction time was also statistically significant to achieve a briquettes density and an appropriate elasticity modulus in the briquettes. The results of this research are of interest and can serve as a starting point for the design of the industrial process of densification of these two mixed biomasses.

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Evaluation of selected physical and mechanical properties of briquettes produced from cones of three coniferous tree species

Cited by 69 publications

References 30 publications

Production and Characterization of Hybrid Briquettes from Corncobs and Oil Palm Trunk Bark under a Low Pressure Densification Technique

Production and Characterization of Hybrid Briquettes from Corncobs and Oil Palm Trunk Bark under a Low Pressure Densification Technique

Forest residues as a renewable source of energy: Elemental composition and physical properties

Experimental Study on the Mechanical Properties of Biomass Briquettes from a Mixture of Rice Husk and Pine Sawdust

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