分子筛与黏土对低阶煤生物成气的增效研究  

Study on Synergistic Effect of Molecular Sieve and Clay on Biogenic Gas Generated from Low-rank Coal

作　　者：武俐[1,2] 曹斌 赵同谦[1] 罗永涛[3] 李鹏 WU Li;CAO Bin;ZHAO Tongqian;LUO Yongtao;LI Peng(Department of Resources and Environment,Henan Polytechnic University,454000 Jiaozuo,China;Collaborative Innovation Center for Coal-bed Methane and Shale Gas of Henan,454000 Jiaozuo,China;Henan Jinma Energy Company Limited,454650 Jiyuan,China;College of Science,China University of Petroleum(Beijing),102249 Beijing,China)

机构地区：[1]河南理工大学资源环境学院,河南焦作454000 [2]中原经济区煤层(页岩)气河南省协同创新中心,河南焦作454000 [3]河南金马能源股份有限公司,河南济源454650 [4]中国石油大学(北京)理学院,北京102249

出　　处：《煤炭转化》2021年第3期42-49,共8页Coal Conversion

基　　金：国家自然科学基金资助项目(41702174,U1704241);中原科技创新领军人才项目(194200510010).

摘　　要：采用扫描电子显微镜及X射线衍射仪对分子筛和黏土进行表征,利用气相色谱测定了低阶煤生物成气过程中气体组分,研究了7种分子筛与黏土混合比例对成气效果的影响。结果表明:添加适当质量比的分子筛和黏土可缩短微生物产甲烷周期,当分子筛与黏土的质量比大于1∶1时,其产甲烷周期缩短至21 d。添加分子筛和黏土对二氧化碳体积分数的变化影响较小,所有组产生的二氧化碳的体积分数在21.00%~24.00%。添加不同比例的分子筛和黏土提高了低阶煤生物产甲烷量,实验组B_(1),B_(2),C_(1),C_(2)和C_(3)的甲烷产量比控制组A_(2)的甲烷产量分别提高了11%,30%,6%,59%和71%。甲烷产量随分子筛比例的增加而增加,分子筛与黏土的质量比为3∶1(C_(3)组)时,甲烷产量最高(632.01μmol/g)。扣除控制组A 1(未添加分子筛和黏土)的甲烷产量后,C_(3)组的甲烷产量为350.22μmol/g,控制组A_(2)的甲烷产量为204.57μmol/g,C_(3)组比A_(2)组的甲烷产量提高了71%。The molecular sieve and clay were characterized by scanning electron microscope and X-ray diffraction instrument,the composition of gas from low-rank coal were determined by gas chromatography,and the effects of seven different mixing proportions of the molecular sieve and clay on the coal biogas production from the low-rank coal were studied.The results show that the addition of appropriate mass ratio of molecular sieve and clay can shorten the methanogenic cycle of the microorganisms.When the mass ratio of molecular sieve to clay is more than 1∶1,the methanogenic period will be shortened to 21 d.The addition of the molecular sieve and clay has minor effects on the change of the volume fraction of carbon dioxide.At the end of the gas production process,the volume fraction of carbon dioxide produced by all experimental and control groups is between 21.00%and 24.00%.The addition of different proportions of molecular sieve and clay increases the methane production from the low-rank coal by microorganisms.The methane production of the experimental groups B_(1),B 2,C_(1),C_(2)and C_(3)increases by 11%,30%,6%,59%and 71%,respectively,compared with that of control group A_(2).The production of the methane increases with the increasing proportion of the molecular sieves.When the mass ratio of the molecular sieve to clay is 3∶1(group C_(3)),the methane production is the highest(632.01μmol/g).After deducting the methane production of the control group A_(1)(without molecular sieve and clay),the methane yields of groups C_(3)and A_(2)are 350.22μmol/g and 204.57μmol/g,respectively.The methane production of group C_(3)is 71%higher than that of group A_(2).

关 键 词：低阶煤 生物气 增效 分子筛 黏土 

分 类 号：P618.11[天文地球—矿床学]