Synthesis of T-type zeolite nanoparticles for the separation of CO2/N2 and CO2/CH4 by adsorption process
Synthesis of T-type zeolite nanoparticles for the separation of CO2/N2 and CO2/CH4 by adsorption process
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DOI：
10.1016/j.cej.2013.06.103
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发表时间：
2013-08-15
影响因子：
15.1
通讯作者：
Liu, Kunlei
中科院分区：
文献类型：
--
作者：
Jiang, Qiying;Rentschler, Jeffrey;Liu, Kunlei
系统地研究了时效、结晶温度、结晶时间、结构导向剂（SDA）对1型沸石纳米颗粒合成的影响。用x射线衍射（XRD）、扫描电镜（SEM）和BET测试对合成的沸石进行了表征。在最佳合成条件下，在120 h内成功制备出粒径为150 ~ 200 nm的纯t型沸石。在288、298和313 K下，测定了合成的t型沸石纳米颗粒对纯气体CO2、N-2和CH4的平衡吸附。t型沸石纳米颗粒对N-2和CH4具有选择性吸附能力。在288 K和100 kPa下，t型沸石纳米颗粒对CO2/N-2和CO2/CH4的选择性分别为53.71和19.15。与微观级t型沸石颗粒相比，1型沸石纳米颗粒具有更高的CO2吸附能力。在288 K和100 kPa下，1型沸石纳米颗粒的CO2吸附量为4.01 mmol/g，比微级t型沸石高30%；对CO2/N-2和CO2/CH4二元气体混合物的动态吸附实验表明，合成的1型沸石纳米颗粒对CO2/N-2和CO2/CH4的分离具有良好的吸附能力和可回收性，在燃烧后CO2分离或天然气净化过程中具有潜在的应用前景。(C) 2013 Elsevier B.V.版权所有
The effects of aging, crystallization temperature and time, and structure directing agent (SDA) on the synthesis of 1-type zeolite nanoparticles were investigated systematically. The synthesized zeolites were characterized with X-ray diffraction (XRD), scanning electron microscopy (SEM) and BET measurements. Under optimal synthesis conditions, pure T-type zeolites with a particle size of 150-200 nm were successfully prepared in a time period as short as 120 h. The equilibrium adsorption of pure gases CO2, N-2, and CH4 on the synthesized T-type zeolite nanoparticles were measured at 288, 298 and 313 K. The T-type zeolite nanoparticles showed the capability of selective adsorption of CO2 over N-2 and CH4. At 288 K and 100 kPa, the selectivity of CO2/N-2 and CO2/CH4 of the T-type zeolite nanoparticles was 53.71 and 19.15 respectively. Compared to the micro-level T-type zeolite particles, the 1-type zeolite nanoparticles exhibited a higher CO2 adsorption capacity. At 288 K and 100 kPa, the 1-type zeolite nanoparticles showed 4.01 mmol/g CO2 adsorption capacities, 30% higher than micro-level T-type zeolite. The dynamic adsorption experiments of CO2/N-2 and CO2/CH4 binary gas mixtures demonstrated that the synthesized 1-type zeolite nanoparticles have promising adsorption capability and recyclability for the separation of CO2/N-2 and CO2/CH4 in the potential application to post-combustion CO2 separation or natural gas purification process. (C) 2013 Elsevier B.V. All rights reserved.