Effects of zirconium content on the catalytic performance of BiMoZrx in the oxidative dehydrogenation of 1‐butene to 1,3‐butadiene
2016
Wan, Chao | Cheng, Dang‐guo | Chen, Fengqiu | Zhan, Xiaoli
BACKGROUND: Oxidative dehydrogenation (ODH) of 1‐butene has been considered as a potential process for manufacturing 1,3‐butadiene (BD). The introduction of metal oxides to pure bismuth molybdate, a promising catalyst for the ODH reaction, can be expected to improve the catalysts performance. In this work, multicomponent bismuth molybdate oxide (BiMoZrₓ) catalysts for ODH of 1‐butene were prepared by a co‐precipitation method with variation of zirconium content (x = 0–0.5), and the influence of zirconium on catalytic performance was investigated. RESULTS: The zirconium content has a significant effect on the structure and performance of the catalyst. The conversion of 1‐butene and the BD yield over BiMoZrₓ catalysts display volcano curves with respect to zirconium content. Among the catalysts tested, BiMoZr₀ .₄ exhibits superior activity. CONCLUSION: 1‐butene temperature‐programmed re‐oxidation (TPRO) and X‐ray photoelectron spectroscopy (XPS) characterizations demonstrate that zirconium content is related to the oxygen mobility of BiMoZrₓ catalysts, and oxygen mobility is a crucial factor determining catalytic performance in the ODH reaction. © 2014 Society of Chemical Industry
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