Biodesulfurization of coal has been carried out in batch culture of single strain and mixed culture of sulfur oxidizing bacteria. The pure cultures of Thiobacillus thiooxidans and Thiobacillus ferrooxidans utilized inorganic sulfur content of Malaysian coal. The chemolithotroph bacteria were able to grow on coal and metabolize the coal's sulfur content. The batch cultures of coal with 3-5 perce...

The ignition temperature, burnout and NO emissions of blends of a semi-anthracite and a high-volatile bituminous coal with 10 and 20 wt.% of olive waste were studied under oxy-fuel combustion conditions in an entrained flow reactor (EFR). The results obtained under several oxy-fuel atmospheres (21%O2-79%CO2, 30%O2-70% CO2 and 35%O265%CO2) were compared with those attained in air. The results in...

The effect of differential crushing on liberation characteristics has been studied for a low volatile coking coal Indian origin through washability studies. Two parameters, namely “Index Washability” (IW) and “Near Gravity Material Index” (NGMI), are used to describe the ease washability. ROM Coal is crushed four different top sizes namely, 75mm, 25mm, 13mm 6mm.On basis calculated IW it observe...

Spontaneous coal combustion (SCC) is one of the significant hazardous phenomena in underground coal mines. The tendency of spontaneous coal combustion is an intrinsic property, due to the presence of the maceral content. Unlike its importance, this matter has not been discussed in detail among the researchers. Therefore, it is necessary to investigate the effect of this parameter on SCC. Macera...

introduction maceral is a term to introduce organic components visible under a microscope (stopes, 1935). the physical and chemical characteristics of macerals such as elemental composition, moisture content, hardness, density and petrographic characteristics differ. the differences in the physical and chemical characteristics of macerals are reflected in their industrial behavior.(parkash, 198...

This study focuses on the multivariate statistical analysis of coal samples from Dahor Formation in Borneo Island, Indonesia, utilizing Principal Component Analysis (PCA). The objective is to discern differences based their geological history and chemical properties. Indonesian industry heavily relies domestic consumption, with plans increase usage for purposes. Coal classification systems play...

The article verified the conformity of gradation coal seams into three groups according to their endogenous fire hazard, regulatory documents, with actual conditions accidents that have occurred over past twenty years during development 66 Donetsk basin. degree metamorphism coals considered seams, where fires or they were absent, was estimated in terms release volatile matters index thermal dec...

The inspiration for this research was the numerical simulation of mass loss of char particles during its combustion in a CFB boiler. The mass loss was presented as the superposition of two separate processes i.e. combustion and surface erosion. The values obtained by the model and experimental data show a good level of conformity. INTODUCTION Until now many authors have attempted numerical simu...

Oil shale is an important unconventional oil and gas resource, but it poorly utilized in the Dalianhe coal mining area, northeastern China. Systematic sampling test analysis were used to evaluate characteristics of quality. The research shows that between middle lower seams coal-bearing member a rich ore with high content, medium calorific value, ash volatile low moisture, ultralow sulfur conte...

Ecological charcoal is coal produced from biodegradable residues rich in carbon, mainly agricultural residues. This has been obtained with different operations such as carbonization, molding and compacting to obtain briquettes. To ensure the quality of coal, several analyses were carried out laboratories. The physicochemical characteristics moisture content, ash fixed carbon content; volatile m...