...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Catalysis science & technology >Synthesis and physicochemical characterization of beta zeolite-bentonite composite materials for shaped catalysts
【24h】

Synthesis and physicochemical characterization of beta zeolite-bentonite composite materials for shaped catalysts

机译：合成和物理化学特性βzeolite-bentonite复合材料形状的催化剂

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

Composite materials for shaped catalysts were prepared from three commercial beta zeolites using bentonite as an aluminosilicate clay binder. All pristine materials and the synthesized powder mixtures were characterized using X-ray powder diffraction for phase purity and structures, scanning electron microscopy for morphology, transmission electron microscopy for porosity and periodicity, nitrogen physisorption for surface area, pore volume and pore size distribution, and Fourier transform infrared spectroscopy using pyridine as a probe molecule to elucidate the presence, strength and amount of BrOnsted and Lewis acid sites. Elemental analysis was carried out using energy dispersive X-ray micro-analysis. Through a systematic comparison of the properties of the individual components and powder zeolite-binder composites, this study elucidated the crucial binder influence on the key properties of the catalytic supports during the synthesis of the composites in the powder form, i.e. prior to shaping. It can be concluded that the promoting effect of the bentonite binder is derived from chemical interactions with the zeolite. The resulting effect of the binder on the composite properties is not a simple additive just reflecting the nominal ratio of the components. The synthesis process, zeolite type (SiO2/Al2O3 ratio of the framework, particle size) and binder concentration play a significant role in the resulting binder effect in composites.
机译：复合材料形状的催化剂准备从三个商业β沸石以膨润土为铝硅酸盐粘土粘结剂。合成粉末混合物的特点用x射线粉末衍射相纯度和结构,扫描电子显微镜形态、透射电子显微镜孔隙度和周期性,氮气物理吸附表面积、孔隙体积和孔隙大小分布和傅里叶变换红外光谱使用吡啶作为探针分子阐明存在,强度和数量他们分别和路易斯酸网站。进行了用能量色散x射线微观分析。单个组件的属性和粉zeolite-binder复合材料,本研究阐明了粘合剂的影响至关重要支持在催化的关键属性合成复合材料的粉末形式,即形成之前。膨润土粘结剂的促进作用来自化学相互作用沸石。复合属性不是一个简单的加法只是反映了名义之比组件。(二氧化硅/氧化铝比例的框架中,粒子大小)和粘合剂浓度发挥重要作用产生的粘结剂的效果复合材料。

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