Influence of Acid–Base Properties of the Support on Copper-Based Catalysts for Catalytic Dehydrogenation of 2-Butanol
作者:Guoyi Bai、Yalong Wang、Fei Li、Zhen Zhao、Guofeng Chen、Na Li、Xue Han
DOI:10.1007/s10562-012-0926-x
日期:2013.1
respectively, were prepared by co-precipitation and tested in the continuous dehydrogenation of 2-butanol to methyl ethyl ketone. The catalytic performance of the catalysts was found to be markedly dependent on acid–base properties of the support. Three copper species were found in the calcined samples: Cu2+, [Cu–O–Cu]n cluster, and bulky CuO oxides. Cu0 was shown to be the active species of the reduced copper-based
通过共沉淀制备了分别负载在 γ-Al2O3、La2O3 和 γ-Al2O3-La2O3 上的铜基催化剂,并在 2-丁醇连续脱氢制甲基乙基酮中进行了测试。发现催化剂的催化性能显着取决于载体的酸碱性质。在煅烧样品中发现了三种铜物质:Cu2+、[Cu-O-Cu]n 簇和大体积的 CuO 氧化物。CuO 被证明是还原的铜基催化剂的活性物质。γ-Al2O3和La2O3作为载体对分散良好的Cu0的协同作用使体系具有最佳的活性和稳定性;而在反应过程中活性 Cu0 的损失被认为是 Cu-La2O3 失活的主要原因。此外,基于 GC-MS 结果提出了可能的反应机理。 图形摘要