Question: what is the difference between lean and rich gas?
Answer: Rich gas and lean gas are the two types of natural gas that are distributed in gas consuming countries. The difference between them is their calorific value, i.e. a different quantity of energy. In other words, 1 m³ of lean gas provides less energy than 1 m³ of rich gas. ... Lean gas contains an average of 10.3 kWh per m³