CuO-ZnAl₂O₄ based catalysts (Cu 7.4 wt%) were tested for selective dehydrogenation of ethanol to acetaldehyde. Different preparation procedures were adopted: wet and incipient-wetness impregnation using commercial ZnAl₂O₄ as catalyst support, chitosan complexation, hard template, solid state and carbon-assisted solid state syntheses (SSC) starting from mixed Cu/Zn/Al precursors. Moreover, support role was investigated by synthesizing unsupported Cu and CuO nanoparticles. Catalysts show high ethanol conversion and high selectivity to acetaldehyde, whereas unsupported Cu and CuO nanoparticles appear to be poorly active in the whole temperature range. Novel Cu-SSC catalyst allows 68.8% yield in acetaldehyde at 623 K in steady state conditions even though a very high selectivity was obtained at 573 K (99.5%). Investigated catalysts can be efficiently pre-reduced directly in the reactant mixture, and they deactivate slowly at the timescale of 8 h on stream, when kept at 573 K. Apparent activation energies are in the range 100–350 kJ/mol, in excellent agreement with literature data.

测试了基于CuO-ZnAl ₂ O ₄的催化剂（Cu 7.4 wt%）用于将乙醇选择性脱氢为乙醛。_{采用了不同的制备程序：使用商业 ZnAl 2} O ₄进行湿法和初湿浸渍作为催化剂载体，壳聚糖络合，硬模板，固态和碳辅助固态合成（SSC）从混合的Cu / Zn / Al前体开始。此外，通过合成无负载的 Cu 和 CuO 纳米粒子来研究负载作用。催化剂表现出高乙醇转化率和对乙醛的高选择性，而未负载的 Cu 和 CuO 纳米颗粒在整个温度范围内似乎活性较差。尽管在 573 K (99.5%) 下获得了非常高的选择性，但新型 Cu-SSC 催化剂在 623 K 的稳态条件下允许乙醛中 68.8% 的产率。研究的催化剂可以直接在反应物混合物中有效地预还原，并且当保持在 573 K 时，它们会在 8 小时的时间尺度上缓慢失活。表观活化能在 100-350 kJ/mol 范围内，