Study of ternary-component bismuth molybdate catalysts by 18O2 tracer in the oxidation of propylene to acrolein
Study of ternary-component bismuth molybdate catalysts by 18O2 tracer in the oxidation of propylene to acrolein
复制标题
18O2示踪三元钼酸铋催化剂丙烯氧化制丙烯醛研究
DOI：
10.1016/0021-9517(81)90353-5
复制
发表时间：
1981
影响因子：
7.3
通讯作者：
T. Ikawa
中科院分区：
文献类型：
--
作者：
W. Ueda;Y. Moro;T. Ikawa
用~（18）O_2示踪法研究了三元铋系催化剂M_xBi_xMo_xO（M = Ni，Co，Mg，Mn，Ca，Sr，Ba，Pb）中晶格氧离子对丙烯选择氧化制丙烯醛反应的参与。晶格氧化物离子在氧化中的参与在每种催化剂上都是突出的，但是参与的程度根据催化剂的结构而显著变化。只有晶格中的氧化物离子在铋铋相被纳入到氧化产物的催化剂（M = Ni，Co，Mg和Mn），其中M具有比Bi 3+更小的离子半径;催化剂颗粒是由一个壳的铋钛酸盐和一个核心的MMoO 4。另一方面，活性颗粒中的全部氧化物离子参与在具有白钨矿型结构（M = Ca、Sr、Ba和Pb）的催化剂上的氧化，其中M具有与Bi 3+相当的离子半径。
Participation of lattice oxide ions of ternary-component bismuth molybdate catalysts MBiMo O (M = Ni, Co, Mg, Mn, Ca, Sr, Ba, and Pb) was investigated using the18O2tracer in the selective oxidation of propylene to acrolein. The participation of the lattice oxide ions in the oxidation is prominent on every catalyst but the extent of the participation varies significantly depending on the structure of the catalyst. Only lattice oxide ions in the bismuth molybdate phase are incorporated into the oxidized products on the catalysts (M = Ni, Co, Mg, and Mn) where M have smaller ionic radius than Bi3+; catalyst particles are composed of a shell of bismuth molybdates and a core of MMoO4. On the other hand, whole oxide ions in the active particles are involved in the oxidation on catalysts having a scheelite-type structure (M = Ca, Sr, Ba, and Pb) where M has a comparable ionic radius to Bi3+.