Effects of operating parameters on maize COB briquette quality

Okot, David K.; Bilsborrow, Paul; Phan, Anh N.

doi:10.1016/j.biombioe.2018.02.015

Cited by 55 publications

(41 citation statements)

References 53 publications

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“…This was confirmed by Mitchual et al [41] suggesting that raw material with finer particles provides a larger surface area for bonding, which results in the production of briquette with a higher density. Owing to the inclination to absorb water, the lower values of CC briquette could be due to a decrease in the briquette weight or a rise in the briquette volume after drying and stabilizing, as observed by Okot et al [21]. Studies have also noted that briquettes produced from hydraulic piston presses have unit densities lower than 1.00 g/cm 3 because of limited pressure [56,66].…”

Section: Densitymentioning

confidence: 90%

“…Recent global production of corn puts the corn production estimate at 1031 million tonnes [17], with an expected increase in corncobs residue. Several studies have investigated the production and characterization of briquettes from corncob [18][19][20][21]. However, some have observed that corncob briquettes have a tendency to absorb water due to high particle porosity [16], and also displayed inadequate durability for handling and transporting after densification using low compaction pressure at room temperature [22,23].…”

Section: Introductionmentioning

confidence: 99%

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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: Densitymentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

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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“…To simulate the stress of the bio-briquette fuel in practice, the mechanical indicator of Compressive strength σ (N·mm −1 ) was applied. Such an indicator did not correspond to any technical standards but is based on previously published papers about strength of products under the pressure [25][26][27][28]. Such an indicator plays an important role in the logistics of solid biofuel transportation and storage when bio-briquette fuel is stored above each other.…”

Section: Mechanical Quality Indicatorsmentioning

confidence: 99%

Valorization of Bio-Briquette Fuel by Using Spent Coffee Ground as an External Additive

et al. 2019

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The present study investigates the quality changes of wood bio-briquette fuel after the addition of spent coffee ground (SCG) into the initial feedstock materials (sawdust, shavings) in different mass ratios (1:1, 1:3). Analysis of SCGs fuel parameter proved great potential for energy generation by a process of direct combustion. Namely, level of calorific value (GCV = 21.58 MJ·kg −1 ), of ash content (Ac = 1.49%) and elementary composition (C = 55.49%, H = 7.07%, N = 2.38%, O = 33.41%) supports such statement. A comparison with results of initial feedstock materials exhibited better results of SCG in case of its calorific value and elementary composition. Bulk density ρ (kg·m −3 ) and mechanical durability DU (%) of bio-briquette samples from initial feedstock materials were following for sawdust: ρ = 1026.39 kg·m −3 , DU = 98.44% and shavings: ρ = 1036.53 kg·m −3 , DU = 96.70%. The level of such mechanical quality indicators changed after the addition of SCG. Specifically, SCG+sawdust mixtures achieved ρ = 1077.49 kg·m −3 and DU = 90.09%, while SCG + shavings mixtures achieved ρ = 899.44 kg·m −3 and DU = 46.50%. The addition of SCG increased wood bio-briquettes energy potential but decreased its mechanical quality. Consequently, the addition of SCG in wood bio-briquette has advantages, but its mass ratio plays an important key role.Energies 2020, 13, 54 2 of 15 economics, politics, and the trade of many developing countries. The coffee production industry, i.e., plant cultivation, cherries harvest, bean processing, product packaging, sale marketing, and final product transportation, offers job opportunities for millions of people [5].Brazil belongs to the top countries in coffee production, as well as Vietnam, Indonesia, and Colombia. Together those countries generate more than 50% of the world's coffee production. Specific statistical data provided by the Food and Agriculture Organization of the United Nations (FAO) and by the International Coffee Organization (ICO) related to the coffee industry in the last years are expressed in Table 1.

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“…In Africa, the predominant source of energy in cooking and heating is majorly biomass (about 80%) which accounts for 14% of the global renewable energy supplied and 10% of the global energy consumption [12]. Generally, firewood and charcoal are the types of biomass used in most parts of Africa.…”

Section: Introductionmentioning

confidence: 99%

“…Numerous forms of biomass have been exploited as energy sources; some of which include; wood shavings/saw dust, agricultural wastes, forest product processing waste, etc. Presently the agricultural residues are receiving serious attention based on the current studies in this area [6,10,[11][12][13][14][15][16][17]. In Nigeria, biomass is mostly obtained from agricultural crop residues and waste generated from the production and processing of corn, sugarcane, rice, forestry residues, cassava, palm kernel, coconut etc.…”

Section: Introductionmentioning

confidence: 99%

Experimental Characterization of Maize Cob and Stalk Based Pellets for Energy Use

Sulaiman¹,

Adetifa²,

Adekomaya³

et al. 2019

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The quest for alternative energy sources is gradually shifting from natural fossil fuel to alternative bio-resources especially agricultural waste products due to their reduced pollution risk and sustainability. This study seeks to investigate the suitability of plant residue pellets to produce biomass. The plant residues investigated include; 100% granulated corn cob residues, 100% granulated corn stalks and a composite of 50:50 granulated corn cobs and stalk residues. The residues were compressed at 200 MPa and pelletized using cassava starch as a binder. The pellets were experimentally analyzed using emission, ultimate, proximate and calorimetry analyses. The result showed that the cobstalk 50:50 combination had the most desirable properties. It has 0.64% nitrogen, 48.57% carbon, 0.38% Sulphur, 6.22% hydrogen, 55.81% oxygen, 3.25% moisture content, 2.20% ash content, 80.0% volatile matter, 17.80% fixed carbon percentage, HHV of 32.9 kJ/kg, an average CO2 of 563±50 PPM, an average CO of 100±50 PPM, and an average value relative humidity of 69±4%. The study reiterates that corn residues are a good bio-fuel and should be encouraged to address the current energy shortfalls.

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Effects of operating parameters on maize COB briquette quality

Cited by 55 publications

References 53 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

Valorization of Bio-Briquette Fuel by Using Spent Coffee Ground as an External Additive

Experimental Characterization of Maize Cob and Stalk Based Pellets for Energy Use

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