分子水平上低碳烷烃催化选择氧化的初步研究

烃类选择氧化在石油化工中极其重要.近二十多年来,随着石油化工原料逐步从烯烃、芳烃等不饱和烃向资源丰富和价格相对低廉的烷烃的转化,研究烷烃的氧化活化和定向转化来取代相应的烯烃和芳烃工艺具有非常重要的学术意义和工业价值.因而,烷烃的选择活化和氧化得到了世界范围内的

Preliminary Study on the Selective Oxidation of Light Alkanes at the Molecular Level

As an example on how to understand the catalytic sites at the molecular level by starting with the model catalysts,this report briefly describes three Re-Sn mixed oxide crystallites with well-defined structures and their catalytic performances in the selective ammoxidation of light alkanes.The specific crystalline(100) structures of SbRe_(2)O_(6) and their interaction with the NH_(3) reactant play a crucial role in the activation of C-H bonds in alkane molecules.The interaction between the(100) planes and NH_(3) leads to the formation of adsorbed NH_(x) species and oxygen vacancies,and it specially increases the activity of the lattice oxygen atoms,which constitute the active sites for the C-H bond activation in the ammoxidation reaction.This provides useful information for the design of novel catalysts of the selective oxidation reactions.