摘要
采用浸渍法将不同量的CuCl负载在MIL-101载体上制备了CuCl@MIL-101吸附剂材料,并用X射线衍射分析(XRD)、热重分析(TG)、傅立叶变换红外光谱分析(FT-IR)、N_2吸附和脱附等方法进行表征,测试CuCl@MIL-101在101.3kPa、25℃下的CO、N_2吸附量,依据理想吸附溶液理论模型(IAST)计算吸附剂对CO/N_2二元混合气体的吸附选择性。结果表明:CuCl的负载加大了CO在CuCl@MIL-101上的吸附容量,其最佳负载量为4mmol/g MIL-101。在101.3kPa下,最佳CuCl负载量的吸附剂对CO的吸附容量由44.62cm^3/g提高到56.63cm^3/g,对N_2的吸附容量由10.88cm^3/g下降到4.38cm^3/g,提高了吸附剂对CO/N_2的吸附选择性,对CO/N_2的吸附选择性由79提高到200。CuCl@MIL-101在200℃、真空下可再生。
CuCl@MIL-101 adsorbents with different CuCl loading were prepared by impregnation method, and characterized by XRD, FF-IR, TG, N2 adsoption and desorption. The adsorption capacities of CO and N2 on the adsorbents were measured under 298K and 101.3kPa, and the adsorption seleetivities of the adsorbents for COIN2 mixtures were estimated on the basis of ideal adsorbed solution theory （lAST）. The results showed that the loading of CuCl onto MIL-101 signifieantly enhanced its CO adsorption capaeity and the optimum CuCl loading was 4mmole per gram of MIL-101. For the optimized CuCl@MIL-101, the adsorption capacity of CO increased from 44.62cm3/g to 56.63cm3/g and the adsorption capacity of N2 deereased from 10.88cm3/g to 4.38cm3/g, giving a significantly improved CO/N2 adsorptive selectivity which, under lO1.3kPa, increased from 79 to 200. The adsorbents could be regenerated under 200℃ and vaeuum.
出处
《天然气化工—C1化学与化工》
CAS
CSCD
北大核心
2016年第6期49-53,77,共6页
Natural Gas Chemical Industry
