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采用水热法合成出碱式醋酸铜(Cu2(OH)3(OCOCH3).H2O),以碱式醋酸铜为前体,经离子交换、焙烧制得铜锰催化剂.利用XRD、SEM/TEM、FT-IR、TG/DTA、低温氮气吸脱附、TPR等对样品进行表征,并考察了铜锰催化剂在水煤气变换反应中的催化性能.结果表明,所合成的碱式醋酸铜为典型层状化合物,其层间距为0.93 nm,经MnO4-离子交换后,层间距变为0.74 nm.不同焙烧温度的离子交换产物经变换反应后主相均为单质铜,随焙烧温度的升高,铜的结晶度逐渐增加,1 000℃时铜的结晶度减小,1 000℃样品的催化活性显著高于其它温度焙烧的样品,且热稳定性良好.
Cu (OH) 3 (OCOCH3) .H2O) was synthesized by hydrothermal method, and copper-manganese catalyst was prepared by ion exchange and calcination using basic cupric acetate as the precursor. FT-IR, TG / DTA, low temperature nitrogen adsorption and desorption, TPR and other samples were characterized, and the catalytic performance of Cu-Mn catalyst in water-gas shift reaction was investigated.The results show that the synthesized basic cupric acetate is a typical layered The interlayer distance was 0.93 nm, and the interlayer spacing was 0.74 nm after MnO4-ion exchange.The main phases of the ion exchange products with different calcination temperature were all single-element copper after the conversion reaction. With the increase of calcination temperature, The degree of crystallinity gradually increased, the crystallinity of copper decreased at 1000 ℃, the catalytic activity at 1 000 ℃ was significantly higher than that of the samples calcined at other temperatures, and the thermal stability was good.