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瓦斯是外来语,即英语的gas。一般泛指气体,例如称毒气为毒瓦斯。也经常把可燃气、煤气、沼气称作瓦斯。在工业生产中常把煤气作业称为瓦斯作业。 煤气是煤、焦炭、半焦等固体燃料或重油等液体燃料经干馏或气化等过程所得气体产物的总称。按照生产方法,一般可分为干馏煤气和气化煤气。干馏煤气主要成分是烷烃、烯烃、芳烃、一氧化碳和氢等可燃气体,同时亦含有少量的二氧化碳和氮等不可燃气体。
Gas is a foreign word, English gas. Generally refers to the gas, for example, toxic gas is called poisonous gas. Often, combustible gas, gas and biogas are called gas. Gas production is often referred to as gas operations in industrial production. Gas is coal, coke, semi-coke and other solid fuels or heavy oil and other liquid fuels by distillation or gasification and other gas products obtained from the general term. In accordance with the production methods, can be divided into dry distillation gas and gasification gas. The main components of the retort gas are combustible gases such as alkanes, alkenes, aromatics, carbon monoxide and hydrogen, as well as a small amount of non-flammable gases such as carbon dioxide and nitrogen.