燃烧是需要条件的，那就是空气（氧气）、热量（火源）和燃料。而可燃气体就是燃料中的一类。当可燃气体的浓度达到其着火下限（LFL）与着火上限（UFL）之间时，就属于相当危险的范畴。所以在各相关行业，例如：煤矿开采、天然气开采、石油石化、钢铁冶金等，均会通过建立可燃气体传感及报警机制来应对突发状况。相关工作人员也会配备手持式或便携式的可燃气体探测器以及时接收到预警，保障人员生命安全。
那么，可燃气体又有哪些呢？除了常见的一氧化碳、甲烷（沼气）、乙烷、乙醛、氢、甲醛、苯等以外，可燃气体的种类繁多，以下列举了一部分较为常见的可燃气体，仅供参考：
名称:化学式[英译]
乙醛:CH3CHO[Acetaldehyde]
醋酸:CH3COOH[Acetic acid]
醋酸酐:(CH3CO)2O[Acetic anhydride]
丙酮:(CH3)2CO[Acetone]
乙酰氯:CH3COCl[Acetyl chloride]
苯甲醛:C6H5CHO[Benzaldehyde]
苯:C6H6[Benzene]
溴乙烷:CH3CH2Br[Bromoethane]
丁烷:C4H10[Butane]
异丁烷:(CH3)2CHCH3[Isobutane]
正丁醇:CH3(CH2)2CH2OH[Butan-1-ol]
乙酸丁酯:CH3COOCH2(CH2)2CH3[Butyl acetate ]
丁胺:CH3(CH2)3NH2[Butylamine]
一氧化碳:CO[Carbon monoxide]
氯乙烷:CH3CH2Cl[Chloroethane]
环丁烷:CH2(CH2)2CH2[Cyclobutane]
环己烷:CH2(CH2)4CH2[Cyclohexane]
环己酮:CH2(CH2)4CO[Cyclohexanone]
环己胺:CH2(CH2)4CHNH2[Cyclohexylamine]
环戊烷:CH2(CH2)3CH2[Cyclopentane]
环丙烷:CH2CH2CH2[Cyclopropane]
二氯二乙基硅烷:(C2H5)SiCl2[Dichlorodiethyl-silane]
二异丁醇:((CH3)2CHCH2)2CHOH[Diisobutyl carbinol]
二甲胺:(CH3)2NH[Dimethylamine]
二丙胺:(CH3CH2CH2)2NH[Dipropylamine]
乙烷:CH3CH3[Ethane]
乙醇:CH3CH2OH[Ethanol]
乙酸乙酯:CH3COOCH2CH3[Ethyl acetate]
乙胺:C2H5NH2[Ethylamine]
丁酸乙酯:CH3CH2CH2COOC2H5[Ethyl butyrate]
乙基环己烷:CH3CH2CH(CH2)4CH2[Ethylcyclohexane]
乙基环戊烷:CH3CH2CH(CH2)3CH2[Ethylcyclopentane]
环氧乙烷:CH2CH2O[Ethylene oxide]
甲酸乙酯:HCOOCH2CH3[Ethyl formate]
甲醛:HCHO[Formaldehyde]
甲酸:HCOOH[Formic acid]
氢:H2[Hydrogen]
硫化氢:H2S[Hydrogen sulphide]
甲烷（沼气）:CH4[Methane (firedamp)]
甲醇:CH3OH[Methanol]
醋酸甲酯:CH3COOCH3[Methyl acetate]
氯甲酸甲酯:CH3OOCC[Methyl chloro-formate]
硝基甲烷:CH3NO2[Nitromethane]
苯酚:C6H5OH[Phenol]
丙烷:CH3CH2CH3[Propane]
四氢噻吩:CH2(CH2)2CH2S[Tetrahydro-thiophene]
甲苯:C6H5CH3[Toluene]