微波水热法合成钛酸盐纳米管用于CO2/CH4吸附分离的研究  

Study on microwave hydrothermal synthesis of TiNTs and its adsorption property of CO2/CH4 mixture

作　　者：王晓华[1] 周瑶[1] 张婧 Wang Xiaohua;Zhou Yao;Zhang Jing(College of Chemistry and Chemical Engineering,Xi\an University of Science and Technology,Xi‘an 710054)

机构地区：[1]西安科技大学化学与化工学院

出　　处：《化工新型材料》2019年第12期256-260,共5页New Chemical Materials

基　　金：国家自然科学基金（41772166）;陕西省重点研发计划（2017DZCXL-GY-10-01-02）

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。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 CO2and 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 CO2and CH4were 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/CH4than other samples.The amine-modified TiNTs not only had higher CO2adsorption capacity,but also had good separation ability,indicating that it had great potential for removal of CO2from coalbed methane.

关 键 词：微波水热法 钛酸盐纳米管 二氧化碳 甲烷 吸附 分离 

分 类 号：TE644[石油与天然气工程—油气加工工程] TB383.1[一般工业技术—材料科学与工程] O647.33[理学—物理化学]