褐煤生物制气产气率影响因素初步研究
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摘要
对河南义马的褐煤煤样,开展了5、10、20 g用量水平及75 kg用量水平生物气化实验,结果表明,微生物可以利用褐煤产生甲烷,5、10和20 g煤粉的产生甲烷效率分别为765、686、521μmol/g,75 kg煤块的产甲烷效率为7.77μmol/g。产气效率随煤用量的增加而降低。块煤暴露在外的表面积少,能够被微生物作用的部分少,产气效率的降低尤其明显,说明提高产甲烷量不能单纯靠提高煤的用量,而应该增加微生物与煤直接接触的面积,相关技术还有待研究。
Simulation experiments of biomethane generation of the coal samples from Yima in Henan province were carried out on levels of 5, 10, 20 g and 75 kg. The results show that lignite can be used to produce methane by microorganism, the efficiency of methanogensis of 5, 10, 20 g and 75 kg were respectively 765, 686, 521, 7.77 μmol/g. It reduced when the coal samples increased, especially the lump coal. Because only less surface of the lump coal exposing outside can be treated by microorganism. The results also show that in order to promote the methanogensis, should enlarge the contact area of coal samples and microorganism, not just to add the coal.
Simulation experiments of biomethane generation of the coal samples from Yima in Henan province were carried out on levels of 5, 10, 20 g and 75 kg. The results show that lignite can be used to produce methane by microorganism, the efficiency of methanogensis of 5, 10, 20 g and 75 kg were respectively 765, 686, 521, 7.77 μmol/g. It reduced when the coal samples increased, especially the lump coal. Because only less surface of the lump coal exposing outside can be treated by microorganism. The results also show that in order to promote the methanogensis, should enlarge the contact area of coal samples and microorganism, not just to add the coal.
引文
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