In How We Made It a 2010 report:
...The domestic coal market is latently large. Besides the potential for power generation, Nigeria currently imports coals of various grades and qualities. There is also the potential for coal exports to countries such as China, Israel, Japan, Ghana, United States, Europe and India.More here
Nigerian coal has been found suitable for boiler fuel, production of high calorific gas, domestic heating, briquettes, formed coke and the manufacture of a wide range of chemicals including waxes, resins, adhesives and dyes. Their characteristic properties (low sulphur and ash content and low thermoplastic properties), make these sub-bituminous coals ideal for coal-fired electric plants. Some Nigerian coals can be used to produce formed-coke of metallurgical quality.