晶种法合成UZM-9分子筛及其CO2/CH4/N2吸附分离性能

以TEAOH和TMAOH为有机模板剂，酸处理的UZM-9分子筛为晶种，采用水热法在48 h内合成出分子筛UZM-9，并对其CO₂/CH₄/N₂的吸附分离性能进行了研究。采用XRD、ICP、TG、SEM与气体吸附等手段对晶种法合成的UZM-9分子筛结构、耐水稳定性与吸附性能进行了研究。结果表明，晶种法可以在2 d内合成出硅铝原子比在3以上、收率达到65%的UZM-9分子筛；所得分子筛的CO₂吸附容量可以达到5 mmol/g以上，吸附热为34 kJ/mol，CO₂/CH₄、CO₂/N₂与CH₄/N₂的平均分离因子分别为100、240与2.4，CO₂分离性能优良且具有一定耐水性能。

Adsorptive separation properties of CO2/CH4/N2 on UZM-9 synthesized by seed-assisted method

The UZM-9 zeolite was synthesized in 48 h via a seed-assisted method, in which TEAOH and TMAOH were used as organic structure directing agent (OSDA) while acid-treated UZM-9 zeolites were employed as seeds. The textural properties and hydrophobicity of the as synthesized UZM-9 zeolites and their adsorption properties for CO₂/CH₄/N₂ were characterized by XRD, physical adsorption, SEM, ICP and TG, respectively. The results show that UZM-9 zeolites can be obtained in 2 d with the Si/Al atomic ratio up to 3 and the yield up to 65%. At 298 K and 1atm, the capacity and adsorption heat of CO₂ are 5 mmol/g and 34 kJ/mol, and the selectivity of CO₂/CH₄, CO₂/N₂ and CH₄/N₂ are 100, 240 and 2.4 respectively. These results reveal that the as synthesized UZM-9 zeolites have good performances for carbon capture and possess considerable water resistance.