What is the difference between bituminous and lignite coal?

In terms of quality, bituminous coal is better than lignite coal due to its high heating value, which is almost double that of lignite. Additionally, bituminous coal has a lower sulfur content with BLCP agreeing to not use coal with a sulfur content in excess of 0.7%. An average sulfer content throughout the year should not be exceeding 0.45%. Lignite coal has a sulfur content of approximately 3-5%.