World over large reserves of low grade coals are available. The use of low-grade coal in
various industries like power plants, metallurgical plants, cement units, etc. creates …

The utilization of high-sulfur coal is becoming more urgent due to the excessive utilization of
low-sulfur, high-quality coal resources, and sulfur removal from high-sulfur coal is the most …

Coal still remains an important source of power generation world over. Along with its usage,
comes unwanted generation of noxious gas emissions, toxic metal releases into wastewater …

In the recent past, researchers have paid much attention to HF, HNO3, and HCl acids for
demineralization of various types of coals with the assumption that they bring negligible …

In the present work an attempt have been made to upgrade the low grade Indian coal to high
grade coal by using caustic (NaOH) leaching followed by acid (H 2 SO 4) treatment. The …

Mae Moh coal from northern Thailand was desulfurized by leaching with methanol/water
and methanol/KOH in a batch reactor. The effect of methanol concentration, KOH …

Chemical leaching is one of the most efficient methods for improving low-grade coal due to
its ability to remove both inorganic and organic minerals economically. This study examined …

Twelve Turkish lignites and the corresponding ashes were leached in sulfuric acid (pH 1.0,
25° C) for 14 days. Asphaltite from Silopi amended the coals. The conditions mimic …

Great progress has been made in the detection of fractions from oxidized lignite, but no
molecular structures are reported. A molecular structure model of oxidized Shengli lignite …

Recently, considerable attention has been focused on energy resources and energy
investigations in Turkey. Domestic energy consumption accounts for 37% of the total energy …