• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Separation and Purification Technology >CO2 separation using PDMS/ZSM-5 zeolite composite membrane
【24h】

CO2 separation using PDMS/ZSM-5 zeolite composite membrane

机译：使用PDMS / ZSM-5沸石复合膜分离CO2

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This study demonstrates the successful implications of hydrothermal and secondary growth techniques for synthesis of high property Silicalite-1 and ZSM-5 zeolites. To prepare ZSM-5 a membrane, the nano-sized Silicalite-1 powder was first synthesized as a seed from a clear solution. The effects of variations in the synthesis time, aluminum content and the number of seeding on the characteristics of ZSM-5 zeolite were studied. It was found that three subsequent seeding steps enhance significantly quality of membranes surface morphology which led to regular growth of ZSM-5 crystals. The zeolite membranes produced were characterized using SEM, TEM, TGA, DSC and N2 adsorption techniques. At room temperature, permeance of CO2 was higher than those of N2 and CH4 and the ideal selectivities for CO2/N2 and CO2/CH4 were 9.6 and 6.5 at mean pressure of 0.5 bar, respectively. Improved zeolite membrane was fabricated by dip-coating of membrane in PDMS solution. Ideal selectivity of produced composite membrane for CO2/N2 and CO2/CH4 was obtained as 21 and 14.2, respectively. Ideal selectivity of CO2/N2 and CO2/CH4 and CO2 permeance decreased with mean pressure in the ZSM-5 zeolite membranes whereas, for composite membrane the selectivities and CO2 permeance increased by mean pressure due to adsorption effect in the range of 0.5-1.5 bar and then remained constant by increasing of mean pressure.
机译：这项研究证明了水热和二次生长技术对于合成高性能Silicalite-1和ZSM-5沸石的成功意义。为了制备ZSM-5膜，首先从透明溶液中合成了纳米级Silicalite-1粉末作为种子。研究了合成时间，铝含量和晶种数量的变化对ZSM-5分子筛性能的影响。已经发现，随后的三个晶种步骤显着提高了膜表面形态的质量，从而导致ZSM-5晶体的规则生长。使用SEM，TEM，TGA，DSC和N2吸附技术对生产的沸石膜进行表征。在室温下，CO2的渗透率高于N2和CH4，在0.5 bar的平均压力下，理想的CO2 / N2和CO2 / CH4选择性分别为9.6和6.5。通过在PDMS溶液中浸涂膜来制备改进的沸石膜。得到的复合膜对CO2 / N2和CO2 / CH4的理想选择性分别为21和14.2。在ZSM-5沸石膜中，理想的CO2 / N2和CO2 / CH4渗透率和CO2渗透率随平均压力降低，而对于复合膜，由于吸附效果在0.5-1.5 bar范围内，平均压力提高了选择性和CO2渗透率然后通过增加平均压力保持恒定。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号