摘要
应用XRD、XPS、TPD及SEM技术研究FbO-TiO_2系列氧化物催化剂的体相组成、表面组成、表面形貌、表面碱性强度及相对碱量,并将其同甲烷氧化偶联制C_2烃类的催化性能相关联。结果表明,随Pbo/TiO_2中PbO含量变化可形成不同结构的铅钛盐复合氧化物,如PbTiO_3及PbTi_3O_7等;结果还表明:碱量越大,比表面越小,越有利于甲烷氧化偶联反应。
In this paper,by using XRD,XPS,TPD and SEM techniques, we have investigated the surface and bulk compositions, surface basicity (intensity and relative amount of basic site)of a series of PbO-TiO_2 catalysts and correlated them with the catalytic performance for oxidative coupling of methane to C_2 hydrocarbons. The obtained experimental data show that With the variation of atomic percentage of the oxides. complex oxides of lead and titanium,such as PbTiO_3 and PbTi_3O_7 may form,and also reveal that the larger the amount of basic site on the surface,the more active and selective is the catalyst for methane coupling.
出处
《天然气化工—C1化学与化工》
CAS
CSCD
北大核心
1991年第1期20-24,16,共6页
Natural Gas Chemical Industry
基金
国家自然科学基金会资助
