NiO,Co3 O4 doped by BaCO3 are prepared by coprecipitation to be used as catalysts for N2 O decomposition.It is found that the BaCo6 catalyst with the optimum composition is much more active than the series of BaxNi6 (x=0-2)catalysts.For the BaCo6 catalyst,to increase its mechanical strength,boehmite as binder is added in appropriate amount,which leads to the BaCo6 Al2.3 catalyst with both better mechanical strength and desired activity for application.At 450 ℃,the BaCo6 Al2.3 catalyst exhibits a stable catalytic activity with time on stream for the feed gas 0.2% N2 O,5% O2 , 2% H2 O,0.01% NO in Ar.%用共沉淀法制备了BaCO3修饰的 NiO和 Co3 O4,用于 N2 O 分解反应的催化剂.研究发现,有最佳组成的BaCo6催化剂比BaxNi6(x=0~2)催化剂活性更高.对于 BaCo6催化剂,加入了适量作为黏结剂的勃姆石以增加催化剂的力学强度.所得 BaCo6 Al2.3催化剂,既有很好的力学强度又有较高的催化活性.在450℃,该 BaCo6 Al2.3催化剂在含0.2% N2 O、5%O2、2% H2 O、0.01% NO的 Ar气氛中,表现出非常稳定的催化活性.
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