摘要
制备了新型专用浓缩甲烷碳分子筛吸附剂CMSCH4,并利用双塔评价装置评价了其从含甲烷的混合气浓缩甲烷的性能。结果显示:对V(CH4)/V(N2)/V(O2)=5/79/16的混合气可浓缩为φ(CH4)=28%、φ(O2)<0.5%的成品气,甲烷回收率34.8%;对V(CH4)/V(N2)=30/70的混合气可浓缩为φ(CH4)=94.1%的成品气,甲烷回收率35.8%;对V(CH4)/V(CO2)=50/50的混合气可浓缩为φ(CH4)=98.5%的成品气和φ(CO2)=93.7%的成品气,甲烷与CO2回收率分别为94.7%和97.3%。新开发的CMSCH4碳分子筛浓缩甲烷吸附剂具有高分离系数,提供了良好的除氮、脱氧和脱碳功能,成为PSA技术浓缩低浓度煤层气和沼气、垃圾填埋气提纯甲烷极有发展前途的吸附剂。
A novel carbon molecular sieve CMSCH4 for adsorptive concentration of methane was prepared, and its performances for concentrating methane from the mixtures containing methane were evaluated in a two column experimental installation. The results showed that for the mixed gas of V（CH4）/V（N2）/V（O2）=5/79/16,φ（CH4） in the product gas was up to 28% with φ（O2） of below 0.5%and methane recovery of 34.8%;for the mixed gas of V （CH4）/V （N2）=30/7,φ （CH4） in the product gas could be up to 94.1% with methane recovery of 34.8%; and for the mixed gas of V （CH4）/V （CO2）=50/50, φ （CH4） and φ （CO2） in methane and CO2 product gases could be up to 98.5%and 93.7%with methane and CO2 recovery of 94.7%and 97.3%, respectively. The adsorbent CMSCH4 had high separation coefficients which made it excellent for removing nitrogen, oxygen and/or carbon dioxide from the gases containing methane and them, and showed great potential for concentrating methane from low concentration coal mine methane, biogas and landfill gas by PSA process.
出处
《天然气化工—C1化学与化工》
CAS
CSCD
北大核心
2014年第6期44-47,62,共5页
Natural Gas Chemical Industry
关键词
碳分子筛
甲烷浓缩
脱氮
脱碳
脱氧
变压吸附
低浓度煤层气
沼气
垃圾填埋气
carbon molecular sieve
methane concentration
nitrogen rejection
oxygen removal
carbon dioxide removal
PSA
low concentration coal mine methane
biogas
landfill gas
