摘要
报道了新型杂原子分子筛Ｍｎ－ＺＳＭ－４８的合成与表征。红外光谱和紫外漫反射光谱测试表明Ｍｎ（Ⅱ）离子进入了分子筛骨架。Ｍｎ（Ⅱ）同晶取代Ｓｉ（Ⅳ）导致产物晶粒的形貌和热性质有所不同。反应混合物中１，６－己二胺的含量，水含量和ＳｉＭｎ比对产物的晶化有很大影响。
A new manganese-containing silicate (designated as Mn-ZSM-48) was prepared from precipitated gels and showed ZSM-48 topological structure in XRD FTIR and DRS graphs show that Mn-ZSM-48 contains tetrahedrally coordinated manganese cations, demonstrating that some of Mn(Ⅱ) cations have been incorporated into its framework The crystal morphology and thermal properties of Mn-ZSM-48 are also different from those of pure-silica ZSM-48 (Si-ZSM-48) The 1,6-hexanediamine content, water content and Si/Mn ratio have strong influences on the as-synthesized products The catalytic measurement of the Mn-ZSM-48, used as a catalyst support in CO hydrogenation to light olefins, shows that incorporation of Mn(Ⅱ) ions into Si-ZSM-48 results in significant increase of catalytic activity and light olefin selectivity
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
1999年第4期289-295,共7页
Journal of Fuel Chemistry and Technology
关键词
杂原子
分子筛
ZSM-48
加氢
催化剂载体
锰
preparation, characterization, Mn-containing silicates, ZSM-48, CO hydrogenation
