Coal combustion is one of the largest contemporary sources of anthropogenic mercury (Hg). It releases geologically sequestered Hg to the atmosphere, and fly ash can contaminate terrestrial and aquatic systems. We estimate that coal combustion has released a cumulative total of 38.0 (14.8-98.9, 80% C.I.) Gg (gigagrams, 109g or thousand tonnes) of Hg to air, land, and water up to the year 2010, m...

Coal spontaneous combustion is one of the most severe and constant hazards in coal industry. Understanding mechanisms basis for effective hazard control coal-producing process. This paper investigated two types oxidized samples from re-mining faces an underground mine. Proximate analysis, elemental surface temperature-programmed experiments, differential scanning calorimetry analysis were condu...

The spontaneous combustion of residual coal in the gob seriously threatens safety mining. Injecting CO 2 into not only prevents from but also realizes storage mined areas. Injection flux and burial depth port are crucial for -preventing fire mine gobs. In this study, distribution oxidation zone Tanyaoping was field-measured, kinetic model built by adiabatic test. Then, a 3-D mathematical constr...

This review deals with the analysis of mercury present in different types of solid, liquid and gaseous samples involved in the coal combustion process, focusing on the specific characteristics of each type of sample and the problems typically associated with these products. The main aim of the paper is to describe the methods that, at the current stage of development, are preferable in each cas...

In this paper a survey of literature dealing with emissions of heavy metals and polyaromatic hydrocarbons during coal combustion is given. The paper is focused not only at big industrial furnaces, but also at problems of small scale furnaces. There is a lot of studies dealing with industrial coal combustion. On the contrary studies dealing with small scale furnaces are substantially less freque...

Particle-byparticle scanning electron microscopy (PBPSEM) and scanning electron microscopy point count (SEMPC) are being developed and applied for characterizing the inorganic phases in coal and coal combustion products. PBPSEM sizes, identifies, and quantifies coal mineral constituents and the degree of mineral-coal association. SEMPC determines the chemical composition and abundance of inorga...