One Question per Day (December 12, 2017)
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Into which categories can gasification methods be divided based on the calorific value of the produced gas? What is the approximate range for the calorific value of the corresponding gas? Answer: There are three methods of coal gasification, namely those for producing gas with low calorific value, medium calorific value, and high calorific value; the calorific values of the gases are 8000 kcal/Nm3 respectively
Like natural gas, it has a high calorific value and a low calorific value
The calorific value of air coal gas is 800 kcal, that of mixed coal gas is 1300–2000 kcal, the calorific value of water gas is about 3000 kcal, the calorific value of coke oven gas is 4000 kcal, the calorific value of blast furnace gas is 1200 kcal, and the calorific value of converter gas is 1800 kcal
Air gas, water gas, and mixed producer gas
There are three methods of coal gasification: for producing gas with low calorific value, medium calorific value, and high calorific value; the calorific values of these gases are 8000 kcal/Nm3 respectively
This is not a classification of gasification methods based on the calorific value of gas
Method for producing low-calorific-value gas, with a calorific value of less than 2000 kcal/m3； Method for producing medium-calorific-value gas, with a calorific value of 2000~4000 kcal/m3 ； Method for producing high-calorific-value gas, with a calorific value of over 8000 kcal/m3.
Water gas, coke oven gas, blast furnace gas?
What you’ve listed are specific types of gas from certain particular sources