Characterization of bio-coal briquettes blended from low quality coal and biomass waste treated by Garant® bio-activator and its application for fuel combustion

Abstract

Experimental research was carried out on the manufacturing of bio-coal briquettes from a blend of two different types of low-quality coal and biomass waste in the absence of coal carbonization, where the third blend of the material was fermented by adding a bio-activator solution before pressurizing the components into briquettes. The coal samples from Caringin-Garut Regency (BB-Garut) had a low calorific value and a high sulfur content (6.57 wt%), whereas the coal samples from Bayah-Lebak Regency (BB-Bayah) had a higher calorific value and a lower sulfur content (0.51 wt%). The biomass added to the coal blend is in the form of fermented cow dung (Bio-Kohe), and it had a calorific value of 4192 kcal/ kg and a total sulfur content of 1.56 wt%. The main objective of this study is to determine the total decrease in the sulfur content in a blend of coal and biomass in which a fermentation process was carried out using a bio-activator for 24 h. The used bio-activator was made from GarantÒ (1:40) ? molasses 1 wt%/vol, and its used amount was 0.2 L/kg. Also, the total sulfur content in the blend was 1.00 wt%-1.14 wt%, which fulfills the necessary quality requirements for non-carbonized bio-coal briquettes. The pyritic and sulfate content in the raw coal was dominant, and the organic sulfur, when fermented with GarantÒ, was found to be less in the produced bio-coal briquettes by 38%-58%.

Physical and mechanical characteristics of composite briquette from coal and pretreated wood fines

“…It also caused a significant reduction in CO and CO 2 emissions. Mursito and Widodo (2020) also characterized bio-coal briquettes blended produced from low quality coal and biomass waste treated with GarantÒ bio-activator. The addition of activated biomass was observed to lower the sulfur content in the low quality coal used.…”

Source Discrimination of Mine Gushing Water Using Self-Organizing Feature Maps: A Case Study in Ningtiaota Coal Mine, Shaanxi, China

“…There have been serious mine water accidents in the Ningtiaota Coal Mine. However, engineering methods, such as geophysical prospecting and drilling, were unable to accurately identify the source of the gushing mine water, and this consumed a large amount of labor and funds [49,50]. This research provided a simple and quick method-the self-organizing feature map-for water source identification.…”

Comparative Analysis of Combustion of Qualified Composite Fuel for the Transitional Period in the Household and Communal Sector in Poland

“…It is significant for its potential recipients. Lignite briquetting studies with the addition of biomass are conducted in various regions of the world [31,32,33,34]. Due to the specificity of lignite, composite fuels may contain a raw material with characteristic properties and parameters closely related to a given area or even a specific deposit from which it is extracted.…”