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首页> 外文期刊>Catalysis science & technology >Transformation of gamma-valerolactone into 1,4-pentanediol and 2-methyltetrahydrofuran over Zn-promoted Cu/Al(2)O(3)catalysts
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Transformation of gamma-valerolactone into 1,4-pentanediol and 2-methyltetrahydrofuran over Zn-promoted Cu/Al(2)O(3)catalysts

机译：gamma-valerolactone转换为1 4-pentanediol 2-methyltetrahydrofuran结束Zn-promoted铜/铝(2)O(3)催化剂

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摘要

The transformation of gamma-valerolactone (GVL) into 1,4-pentanediol (1,4-PDO) and 2-methyltetra-hydrofuran (2-MTHF) in the presence of H-2, one of the useful biomass conversion and utilization processes, was investigated with monometallic Cu/Al(2)O(3)and bimetallic ZnCu/Al(2)O(3)catalysts. A 10 wt% Cu-loaded monometallic catalyst produced 1,4-PDO and 2-MTHF in comparable quantities at a medium conversion (similar to 50%). When Zn was added in a range of Zn/Cu molar ratios of up to 2, in contrast, the catalysts yielded 1,4-PDO in a high selectivity of about 97% at low and high conversion levels. In addition, the 1,4-PDO selectivity over the ZnCu/Al(2)O(3)catalysts remained almost unchanged during recycled runs. That is, the addition of Zn to Cu/Al(2)O(3)switched the product selectivity and improved the catalyst stability and reusability. Furthermore, the physicochemical properties of the catalysts were characterized by several methods including XRD, TEM, TPR, XPS, FTIR of adsorbed pyridine, and so on. On the basis of those results, the relationships between the catalytic performance (activity, selectivity, and reusability) and the catalyst structural features were discussed.
机译：的变换gamma-valerolactone (GVL)1, 4-pentanediol (1, 4-PDO)和在the presence 2-methyltetra-hydrofuran (2-MTHF)2,一个有用的生物质转换和利用流程,进行了研究单本位制的铜/铝(2)O(3)和双金属ZnCu / Al (2) O(3)催化剂。单本位制的催化剂生产1,4-PDO 2-MTHF相当数量的介质转换(类似于50%)。锌/铜的摩尔比率2,相比之下,在高选择性催化剂产生1,4-PDO约97%的较低水平和高转换。此外,1,4-PDO选择性的ZnCu / Al (2) O(3)催化剂仍然几乎不变在循环运行。铜/铝(2)O(3)切换产品选择性和提高催化剂的稳定性和可重用性。催化剂具有的属性几种方法包括XRD、TEM、TPR、XPS,吸附吡啶的红外光谱,等等。基于这些结果,之间的关系催化性能(活动,选择性,结构和可重用性)和催化剂特性进行了讨论。

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