【摘要】 采用微波水热法合成了具有发达孔结构的钛酸盐纳米管（TiNTs）,并用浸渍法将二乙烯三胺（DETA）、三乙烯四胺（TETA）、四乙烯五胺（TEPA）负载至钛酸盐纳米管上,用以吸附分离CO₂和CH₄。利用扫描电镜（SEM）、低温氮吸附仪（BET）、傅里叶变换红外光谱（FT-IR）等方法对吸附剂结构进行表征,通过贝士德吸附仪研究其CO₂和CH₄的吸附性能,并对CO₂/CH₄的分离系数进行模拟计算。结果表明,60%TEPA改性的TiNTs分离因子最大,能很好地分离CO₂和CH₄;胺修饰的TiNTs除具有较高的CO₂吸附能力外,还具有良好的分离能力,在煤层气CO₂脱除方面表现出很大的应用潜力。更多还原

【Abstract】 Titanate nanotubes（TiNTs）with well-developed pore structure were synthesized by microwave hydrothermal method,and modified with diethylenetriamine（DETA）,triethylenetetraamine（TETA） and tetraethylenepentamine（TEPA）,and the adsorbents were modified by adsorption and separation of CO₂ and CH₄.The sorbents were characterized by scanning electron microscopy（SEM）,low-temperature nitrogen adsorption（BET）,fourier transform infrared spectroscopy（FT-IR）,and the adsorption properties of CO₂ and CH₄ were studied by using Beishide adsorption instrument,langmuir simulation were applied to investigate the separation coefficient of carbon dioxide and methane.The results shown that the 60% TEPA-TiNTs was more suitable for the adsorptive separation of the mixtures of CO₂/CH₄ than other samples.The amine-modified TiNTs not only had higher CO₂ adsorption capacity,but also had good separation ability,indicating that it had great potential for removal of CO₂ from coalbed methane.更多还原