NOX reduction over paper-structured fiber composites impregnated with Pt/Al2O3 catalyst for exhaust gas purification
NOX reduction over paper-structured fiber composites impregnated with Pt/Al2O3 catalyst for exhaust gas purification
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DOI：
10.1007/s10853-010-4504-6
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发表时间：
2010-08-01
影响因子：
4.5
通讯作者：
Wariishi, Hiroyuki
中科院分区：
文献类型：
--
作者：
Koga, Hirotaka;Ishihara, Hirotake;Wariishi, Hiroyuki
采用一种简单的造纸技术，成功地将Pt/Al2O3催化剂粉末加入到由陶瓷纤维网络组成的微结构类纸基体中。所制备的复合材料（纸结构催化剂）用于丙烯存在下的氮氧化物还原，用于废气净化。与传统的pt负载蜂窝催化剂相比，纸结构催化剂表现出更高的NOX还原效率和更快的热响应性，这表明具有相互连接的孔空间的纸状结构有助于将热量和反应物有效地传递到催化剂表面。此外，具有柔性纸板外观的纸结构催化剂具有很高的实用性。采用层次化组装的纸结构催化剂，使Pt催化剂优先位于上部，提高了Pt催化剂的利用效率。纸结构催化剂复合材料具有类似纸的实用性和多孔的微观结构，被认为是一种很有前途的高效净化NOX气体的催化材料。
Pt/Al2O3 catalyst powder was successfully incorporated in a microstructured paper-like matrix composed of a ceramic fiber network, by use of a simple papermaking technique. As-prepared composite, denoted paper-structured catalyst, was applied to the reduction of nitrogen oxide (NOX) in the presence of propene, for exhaust gas purification. The paper-structured catalyst demonstrated higher NOX reduction efficiency and more rapid thermal responsiveness than a conventional Pt-loaded honeycomb catalyst, indicating that the paper-like structure with interconnected pore spaces contributes to effective transport of heat and reactants to the catalyst surfaces. Furthermore, the paper-structured catalyst with the appearance of flexible paperboard has a high degree of utility. The efficiency of utilization of Pt catalyst was improved by using hierarchically assembled paper-structured catalysts with preferential location of Pt catalyst in the upper part. The paper-structured catalyst composite with paper-like utility and porous microstructure is thought to be a promising catalytic material for efficient NOX gas purification.