...
首页> 外文期刊>Physical chemistry chemical physics: PCCP >Nucleation and growth of zeolite A under reagent controlled conditions Part II
【24h】

Nucleation and growth of zeolite A under reagent controlled conditions Part II

机译:试剂控制条件下沸石A的成核和生长第二部分

获取原文
获取原文并翻译 | 示例
           

摘要

Broad differences in the synthesis kinetics and the morphology of zeolite A from two silicate sources (soluble silicate and Ludox colloidal silica) and two different aluminium sources (aluminium isopropoxide and freshly prepared aluminium hydroxide) are reported. The differences are attributed to different rate limiting steps in the syntheses. The reactions have been followed by small angle X-ray scattering from the time of first mixing of the constituents until the final separation of zeolite A crystals. The soluble silicate and Ludox/aluminium hydroxide syntheses produce excellent cubic crystals in the 300 nm-1 #mu#m size range. The products of the first synthesis have an interesting texture on the scale of nanometres but with aluminium isopropoxide as the aluminium source, the resulting zeolite A has a spherical morphology of size ca. 100 nm. Possible reasons for the development of these morphologies are discussed.
机译:据报道,两种硅酸盐来源(可溶性硅酸盐和Ludox胶体二氧化硅)和两种不同铝来源(异丙醇铝和新鲜制备的氢氧化铝)在沸石分子筛A的合成动力学和形态上存在很大差异。差异归因于合成中的不同速率限制步骤。从组分的首次混合到沸石A晶体的最终分离,反应进行了小角度的X射线散射。可溶性硅酸盐和Ludox /氢氧化铝的合成可在300 nm-1#mu#m尺寸范围内产生出色的立方晶体。第一次合成的产物在纳米级上具有令人感兴趣的质地,但是以异丙醇铝作为铝源,所得的沸石A具有尺寸为约1μm的球形形态。 100纳米讨论了这些形态发展的可能原因。

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