influence of indonesian coal properties

3.2 Influence of coal properties on MB adsorption amount Broken lines in Fig. 3 mean the tendency in case of shifting MB adsorption amount to the mineral matter (MBm). Values of MBm for alpha coal and beta coal were mutually replaced. Although there was some difference of MBm between alpha coal and beta

This report examines the influence of coal properties on the emission of pollutants to the atmosphere. To illustrate this, four pollutants are considered. They are: sulphur oxides, nitrogen oxides, particulates, and trace elements. These pollutants are representative of the various impacts of the coal properties.

For simplicity, the geometry is idealized to a straight circular channel of initially uniform diameter. Coal and inlet gas properties, as well as gas flow rate and initial channel diameter, are arbitrary. A baseline case, in which O 2-steam is injected into a channel in coal, is chosen to match laboratory work reported by other

Based on its vitrinite reflectance and calorific values, some of selected high rank coals from Kutai Basin have developed semi coking properties. The enhancement of rank is probably due to the effect of igneous intrusions or high gradient temperature. However, vitrinite content

Since the early 1990's Indonesian coal mining in Indonesia has grown dramatically. The World Coal Institute estimates that in Indonesia mined 246 million tonnes of coal with just over 200 millions tonnes of this exported. coal exports comprised 173 million tonnes of steam coal and 30 million tonnes of coking coal. In , Indonesia was the world's second largest coal exporter behind

The coal quality of different coal fi elds from India is given in Table 2(ref. 15). India has 70 bt reserve of coal; amounting to almost 7 per cent of the global reserves. Significantly, 86.4 per cent of coal reserves in India lie within easil y exploitable depth of 600 m. The Indian coal

Feb 01,  · Adequate fusion properties and low ash percentage of coal are recommended to improve the economic benefit of gasification. For a membrane wall entrained flow gasifier, flow properties of coal slag will greatly influence the heat transfer, mass transfer and

Apr 21,  · The Indonesian police are plagued by corruption, and bribery is widespread, presenting companies with high risks. Police officers solicit bribes on every level, ranging from traffic violations to criminal investigations ().). Two out of five people perceive most or all of the police to be corrupt and one in four Indonesians report having paid a bribe to the police services in the past 12

Geologists also classify coal types according to the organic debris, called macerals, from which the coal is formed. Macerals (microscopic organic constituents found in coal) are identified (microscopically) by reflected light - the reflective or translucent properties of the coal

major role in the coal market since Indonesian coal benefits from low ash and sulfur contents. Due to the ideal geographic position for Asian coal demand, it is time to engage in the study of Indonesian metallurgical coal. Basic coal and coke analysis are undertaken to generalize the chemical and physical properties.

Modern coal-quality data and geologic field observations are interpreted in terms of the coal geology in a small area near Pocahontas, Va. Detailed chemical analyses and physical-property determinations of 12 channel-coal samples (reported on whole-coal and laboratory ash basis) indicate that the coals are mostly of high coking quality, low