The concentration of different maceral groups and minerals in coal influence the quality as each them behaves differently during heat treatment. purpose this study is to know how these are behaving at temperature conditions. Therefore, various macerals were concentrated by using heavy liquids specific gravities (1.3, 1.7 1.9). generated density fractions treated with 400, 600, 800 1000 °C. All ...

Tertiary coals exposed in the north-central part of onshore Sarawak are evaluated, and their depositional environments are interpreted. Total organic carbon contents (TOC) of the coals range from 58.1 to 80.9 wt. % and yield hydrogen index values ranging from 282 to 510 mg HC/g TOC with low oxygen index values, consistent with Type II and mixed Type II–III kerogens. The coal samples have vitrin...

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...