煤层气浓缩用碳分子筛的研制及性能研究  

Preparation and separation performances of carbon molecular sieve for coal-bed methane purification

作　　者：李兰廷 

机构地区：[1]煤炭科学技术研究院有限公司煤化工分院,北京100013 [2]煤基节能环保炭材料北京市重点实验室,北京100013 [3]煤炭资源高效开采与洁净利用国家重点试验室,北京100013

出　　处：《洁净煤技术》2016年第2期1-4,8,共5页Clean Coal Technology

基　　金：国家科技重大专项资助项目(2011ZX05041-004)

摘　　要：为评价分析碳分子筛（Carbon Molecular Sieves,CMS）产品性能,以酚醛树脂废料为主要原料,通过添加助剂,采用炭化/气相沉积一体化工艺,制备了专用于煤层气提浓的BM碳分子筛（记为BMCMS）。采用CO2吸附法、加压热重法及四塔变压吸附法对BMCMS及商业碳分子筛（记为JCCMS）的孔隙结构、CH4和N2的吸附容量、速度以及对煤层气的实际分离性能等进行研究。结果表明,BMCMS碳分子筛的孔隙以0.85 nm以下微孔为主,主要分布在0.40.65 nm,其比例占整个孔隙的66%以上,高于JCCMS的65%;碳分子筛的孔隙直径为N2分子的1.1-1.8倍时,该类孔隙适宜吸附N2,而对CH4的吸附具有阻碍作用;当用于PSA浓缩抽采煤层气时,可将煤层气中CH4浓度提高25.6%,实际运行指标优于JCCMS。In order to analyze properties of carbon molecular sieves （ CMS）, BM carbon molecular sieve （BMCMS） was prepared from phenol-formaldehyde waste with additives by one-step carbonization-chemical vapour deposition （CVD） technique on industrialized scale. The microstructure and properties of BMCMS, such as pore volume, pore size distribution, adsorption value and rate of N2 or CH4, and sepa- ration performance to coal-bed methane, were determined by CO2 adsorption, electronic balance and PSA, respectively. The results showed that BMCMS had more micro-pores below 0.85 nm, especially in the range of O. 4 nm to O. 65 nm, the rate was over 66%, while the rate of JCCMS was 65%. The pore could hold back CH4 and adsorb N2 easily,while the diameter of the pore reached to the scale of 1.1 to 1.8 times of that of N2 molecular. Moreover, the concentration of methane increased by 25.6% with PSA compared to that without PSA. The results indicated that the separation performance of BMCMS for coal-bed methane purification was better than that of JCCMS.

关 键 词：碳分子筛 酚醛树脂废料 煤层气 变压吸附 

分 类 号：TQ028.15[化学工程]