Conversion of 2,3-butanediol to butenes over bifunctional catalysts in a single reactor
Conversion of 2,3-butanediol to butenes over bifunctional catalysts in a single reactor
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DOI：
10.1016/j.jcat.2015.07.004
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发表时间：
2015-10
影响因子：
7.3
通讯作者：
Quanxing Zheng;M. Wales;Michael G Heidlage;M. Rezac;Hongwang Wang;S. Bossmann;K. Hohn
中科院分区：
文献类型：
--
作者：
Quanxing Zheng;M. Wales;Michael G Heidlage;M. Rezac;Hongwang Wang;S. Bossmann;K. Hohn
在本研究中，采用Cu/ZSM-5催化剂在单反应器中催化2,3-丁二醇在氢存在下加氢脱氧制丁烯。随着SiO2/ al2o3比（降低沸石酸性）和h2 /2,3-丁二醇比的增加，丁烯的碳选择性提高。SiO2/ al2o3比为280的Cu/ZSM-5合成丁烯的活性最好；而Cu/ZSM-5与SiO2/ al2o3（23）在过量氢条件下也有利于2,3-丁二醇的脱氢反应。在ZSM-5（280）沸石上，丁烯的碳选择性随着铜负载的增加而增加，其中19.2 wt%的CuO对丁烯的选择性最高，达到71%。最佳反应温度为250℃左右。实验证明，甲基乙基酮（MEK）和2-甲基丙烯是2,3-丁二醇转化为丁烯的中间体。产丁烯的最佳性能是铜和酸催化功能平衡的结果。
In this study, Cu/ZSM-5 catalysts were used to catalyze the hydrodeoxygenation of 2,3-butanediol to butenes in a single reactor in the presence of hydrogen. The carbon selectivity of butenes increased with increasing SiO2/Al2O3ratio (lowering acidity of zeolite) and H2/2,3-butanediol ratio. Cu/ZSM-5 with a SiO2/Al2O3ratio of 280 showed the best activity toward the production of butenes; however, Cu/ZSM-5 with SiO2/Al2O3of 23 was favorable for the dehydrogenation reaction of 2,3-butanediol even in the excess of hydrogen. On zeolite ZSM-5(280), the carbon selectivity of butenes increased with increasing copper loading and 19.2 wt% of CuO showed the highest selectivity of butenes (maximum 71%). The optimal reaction temperature is around 250 °C. Experiments demonstrated that methyl ethyl ketone (MEK) and 2-methylpropanal are the intermediates in the conversion of 2,3-butanediol to butenes. The optimal performance toward the production of butene is the result of a balance between copper and acid catalytic functions.