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沼氣是一種混合氣體,主要成分是甲烷(CH4)、其餘為二氧化碳(CO2)、氧氣(02)、氮氣(N2)和硫化氫(H2S).其中甲烷含量約為55%--70%,二氧化碳含量約為30%--45%.沼氣的主要成分是甲烷. 沼氣密度約為1.215kg/m3 沒有噸那麼多 因為沼氣是混合氣體,裡面的各組分,比例不確定,
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