Combustion Characteristics Of Briquettes Research Articles

Experimental analysis and combustion characteristics of briquettes from different wood in nigeria

Experimental analysis and combustion characteristics of briquettes from different wood in nigeria

EFFECT OF THREE FEEDSTOCKS MIX ON BRIQUETTES’ PHYSICAL AND COMBUSTION PROPERTIES

Significant quantities of biomass are available in Africa for conversion into domestic energy sources. However, they are underutilized due to poor physical and combustion properties. Knowledge about the effect of briquettes with three feedstocks has not been fully studied. Thus, the main objective of this study was to assess effect of three feedstocks mix on briquettes’ physical and combustion properties. The feedstocks; rice husk- maize cobs and bagasse were carbonized in a drum kiln and mixed at different ratios (1:1:1, 1:2:2, 1:3:3, 2:1:2, 2:2:3, 2:3:1, 3:1:3, 3:2:1 and 3:3:2) before densification using screw press technique. Briquettes were sampled for Laboratory testing. At the optimal ratio, 3:2:1, physical properties; moisture content and density values were 6.43% and 904 kg/m3 respectively. Results showed values of 3.63% for ash content, 18.56% for volatile matter, 77.81% for fixed carbon and 29.04 MJ/kg for calorific value. Number and type of feedstocks are thus factors influencing physical and combustion characteristics of briquettes in converting agricultural wastes to useful energy application. Findings from this study are therefore useful to briquettes users, as a source of clean energy, in making right choices on feedstocks mix ratios during densification thus realization of Sustainable Development Goal (SDGs #7).

Fuel Characteristics of Briquettes Manufactured by Natural Stacking Bamboo/Chinese Fir Mixtures.

Bamboo wastes were naturally stacked for 1 month and were uniformly mixed with Chinese fir. Briquettes were manufactured by a briquette extruder at different process temperatures and mixing ratios. The physical, mechanical, pyrolysis, and combustion characteristics of briquettes were determined. The results showed that the mixing ratios and process temperature had a significant impact on the fuel properties of briquettes. The optimum briquettes were manufactured by 70% bamboo/30% Chinese fir blends at a process temperature of 520 °C. The fuel properties of optimum briquettes met the standard requirement of LY/T 2552-2015 and GB/T 28669-2012. The lower heating rate at the primary pyrolysis stage increased the yield of charcoal during the carbonization process of briquettes. The combustion process of briquettes added a char combustion stage, compared with the pyrolysis process. There were no synergistic interactions of bamboo and Chinese fir during pyrolysis and combustion process. The results of this research are helpful to develop large-scale production of bamboo briquettes or charcoal.

Biomass Briquettes as an Alternative Fuel: A Comprehensive Review

Effectively utilizing agro residues, when abundantly available, can help energy conservation efforts and increase farmers’ incomes. This article highlights the effective utilization of agro and industrial biomass residues in the form of briquettes. The various types of feedstock used and the technologies adopted in the briquetting process are discussed. Process parameters and feedstock variables influencing briquetting are described. Combustion studies undertaken using briquettes are comprehensively detailed. This literature review reveals that the combustion characteristics of briquettes not only depend on the type of the feedstock but also on the density, moisture content, binder percentage, and method used for briquetting. Higher ash content lowers the calorific value. The ash formed during combustion causes slagging and fouling which in turn lead to corrosion. It is concluded that biomass briquettes can meet the energy demands for cooking and heating needs, especially in rural areas where abundant biomass feedstock is available. It is recommended that research focuses more on investigating emissions along with the combustion of briquettes manufactured from different origins.

A Study of Combustion and Environments of Biomass Briquettes from Sawdust Mixed with Glycerin

This study was aimed to investigate the combustion characteristics of briquette fuel produced from sawdust mixed with glycerin. The study compared the combustion temperatures and mass reduction over time during combustion. The environmental impact was also studied by detecting acrolein gas. The experiments were carried out using briquette fuel mixed by sawdust, molass and glycerin of different ratios. The results indicated that increasing of the ratio of glycerin affected on higher combustion temperature, and higher mass reduction. Acrolein gas was found in exhaust at maximum of 48.6 ppm. This quantity of toxic gas was acceptable.