By 2018, gas was divided into two main systems, natural and artificial, by source. Natural gas refers to flammable gases derived from geological extraction, including mainly natural gas and coal-bed gas; artificial gas refers to flammable gases derived from carbon-containing fuel processing, which are usually converted from solid, liquid or gaseous fuels。
Natural gas type coverage
Natural gas: oil fields, gas fields and coal layers to be deposited through drilling
Coal layer gas: adsorption or drifting into the coal layer and its surroundings, similar to natural gas
Artificial gas type broadcast
Artificial gas: flammable gases obtained from the conversion of solids, liquids or gases (including coal, heavy oil, light oil, liquid petroleum gas, natural gas, etc.) and meeting the quality requirements of the current national standard, artificial gas gb13612. Artificial gas is also known as gas。
Artificial gas is divided into four categories according to the production process:
Combination gas: gas produced by the dry distillation of coal in the furnace, containing flammable components such as hydrogen and methane
High furnace gas: by-product gases, including carbon monoxide, nitrogen gas, etc., generated during iron refining in high furnaces
Coal: gases gas generated by gas gas gas gas gas gas gasification in gaseous furnaces, classified as air gas, mixed gas, water gas, oxygen-rich gas, depending on the gasification agent
Oil, gas and gas: gases from high-temperature cracking of heavy oil or crude oil containing components such as hydrogen, methane and ethylene
Main application classification coverage
Major applications of gas in the civilian sector include artificial gas and natural gas。
Artificial gas: the composition is dominated by hydrogen, methane, carbon monoxide, mostly transported through pipelines。
Natural gas: mainly methane, delivered through pipelines to users. Depending on the manner of exploitation and the location of the deposits, they can be divided into pure fields, gas, oil and gas。
Environmental and economic coverage
Gases are used as alternative fuels for coal and oil, and post-combustion pollutant emissions meet national environmental standards. Gas is more efficient and economically efficient than direct combustion of coal or oil, and pollution indicators meet national environmental standards。
