The acid-base properties of MoO3Bi2O3P2O5 catalysts and their correlation with catalytic activity and selectivity

摘要: Abstract The amounts of both the acidic and basic sites MoO 3 Bi 2 O P 5 catalysts over a full range Bi Mo ratios were measured by studying adsorption molecules, respectively, in gas phase. results obtained pulse method agreed well with those static method. acidity pure is far lower than that , an increase content, rapidly increases at first, passes through maximum atomic ratio 1–2, then decreases. On other hand, basicity fairly low compared ; catalyst gradually content. relationship between acid-base properties here catalytic behavior previously was investigated. oxidation isomerization activities for olefins are proportional to catalyst, activity compound hydrogen connected basicity. selectivity also interpreted connection properties. Finally, characters active discussed, together sites.