For the resource potential evaluation of oil shale, parameters such as oil yield, content of semi-coke, ash and volatiles, and calorific value
are important [9-12].
On net calorific value
( NCV) basis, the new gas price for October 1 to March 31, 2016, would be $ 4.
Thereafter the said inferior quality coal was brought to India in different vessels , vide different Bill of Entries , having gross calorific value
, far less than technical specifications of the agreement and thus liable to be rejected, and was supplied to NSPCL, Bhilai Power Plant, which has resulted in a wrongful loss of Rs 92,91,55,588/- approximately.
Gross Calorific Value
of coal produced at NAD is typically 5,300 - 5,500 kcal / kg (adb).
The main quality indicators are calorific value
(Q) and oil yield (T).
In accordance with the main mining conditions (seam thickness, seam calorific value
, calorific value
of oil shale layer and indexes of thickness), potential oil yield distribution was modelled in the area of the deposit [10-12]
Daily fluctuations in the heating value not to exceed the contracted calorific value
track of +/- 5%.
On average, the calorific value
is 3550 kJ/kg and the oil content is 5 wt%.
The coal produced from the Willow Creek mine is of very good quality, with high calorific value
, and low ash and sulphur content.
Mass fraction of hydrogen sulfide and mercaptan sulfur,%, not more than 0,005, net calorific value
at T = 0 0 C (273 K) and P = 0.
Power plants use oil shale with calorific value
The thermal coal has an ash content of 13% and a calorific value
of 7,100 kCal/kg on an air-dried basis.