Wood and Briquette Density Under the Effect of Fertilizers and Water Regimes

Silva, Raissa Tavares; Sette, Carlos Roberto; Ferreira, Angel Boschiero; Chagas, Matheus Peres; Filho, Mário Tomazello

doi:10.1590/2179-8087.047116

Cited by 6 publications

(1 citation statement)

References 24 publications

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“…The increase in the apparent density with the increase of the compaction pressures was due to the reduction of empty spaces during the compaction, improving the cohesion between the compacted particles [47]. The lower apparent density of coffee pruning wastes and sugarcane bagasse briquettes agreed with results from 0.96 to 1.03 g•cm −3 for those made with 26 years old coffee Arabica plant materials [36].…”

Section: Discussionsupporting

confidence: 71%

Potential of Briquette Produced with Torrefied Agroforestry Biomass to Generate Energy

Portilho

Castro

Carneiro

et al. 2020

Forests

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Agroforestry industries, such as sugar-alcohol, food, and logging, produce large quantities of waste, used to generate energy from direct burning. The application of other processes, such as torrefaction and briquetting, can increase the profits from the use of agro-industrial waste for energy generation. Briquetting is an alternative for using these wastes, allowing the compaction of the biomass, generating a biofuel with high energy density, and which is more homogeneous and easier to store and transport. The objective of this study was to evaluate the physical and chemical properties of four biomass types (wastes from sawed eucalypt and pine wood, coffee pruning wastes, and sugarcane bagasse) torrefied at 300 °C and compacted (briquetting) at pressures of 6.21, 8.27, and 10.34 MPa. The torrefaction increased the fixed carbon content, ash, and calorific value, and reduced the volatile material content and hygroscopic equilibrium moisture of the biomasses. The volatile material content was lower and the fixed carbon higher in the coffee pruning waste, the ash content higher in the sugarcane bagasse, and the calorific value higher in the pine and eucalypt wood. The briquetting and the torrefaction processes increased the biomass bulk density, and the useful calorific value, respectively, and consequently the energy density of the briquettes produced with torrefied raw material under high pressure. The mechanical properties of the briquettes produced with all materials increased with the compaction pressure. Torrefaction and briquetting increased the energy potential of the biomasses evaluated to produce energy from clean technology.

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Section: Discussionsupporting

confidence: 71%