analysis of coal,proximate analysis of coal
- 1. ANALYSIS OF COAL SAYYAD MOULALI 2201520044, Msc Analytical chemistry, KL UNIVERSITY,GUNTUR. 1
- 2. There are two methods for analyzing coal: Ultimate analysis and Proximate analysis. coal Analysis Ultimate Analysis Proximate Analysis 2 ANALYSIS OF COAL
- 3. PROXIMATE ANALYSIS Four parameters which have been analysed under this particular method as, moisture content, volatile matter, ash content, fixed carbon. 3
- 4. 4 MOISTURE ANALYSIS • Take a representative sample of finely powdered coal • Place the sample in a silica crucible • Heat the crucible in an electrical hot air oven at a temperature of approximately 105- 110°C • Weigh the crucible with the remaining coal • Repeat the heating and cooling process until the weight of the crucible with the coal remains constant • Calculate the loss in weight as a percentage of the initial weight of the coal sample. The formula for calculating moisture content is as follows: Moisture (%) = (loss in weight due to moisture removal / weight of coal sample taken) x 100.
- 5. DETERMINATION OF VOLATILE MATTER • Obtain a sample of moisture-free coal • Preheat a muffle furnace to a specific temperature of 925°C ± 20°C. • Heat the sample for a duration of 7 minutes. • Weigh the crucible again after coolingThis weight loss represents the volatile matter content in the coal. This is calculated using the formula: Volatile matter (%) = (loss in weight due to removal of volatile matter / weight of coal sample used) x 100. 5
- 6. Determination of Ash content • Obtain a sample of dry coal. • Place the coal sample in an open crucible • heat the sample for a duration of thirty minutes.at temperature range of 700-750°C. • Calculate the percentage of ash content based on the weight of the residue. • Lower ash content indicates higher coal quality. The ash content is calculated using the Formula: Ash content (%) = (weight of ash formed / weight of dry coal taken) x 100. 6
- 7. Fixed Carbon Once the moisture, volatile matter, and ash content have been determined, the remaining substance is referred to as fixed carbon. Formula:- Fixed carbon % = 100-(moisture%+VM %+Ash %) 7
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