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科学通报  2015 

乙醇蒸汽重整制氢镍基催化剂的尺度效应与构效关系

DOI: 10.1360/N972015-00950, PP. 3230-3238

Keywords: Ni基催化剂,壳核型催化剂,乙醇蒸汽重整,催化剂颗粒尺度效应,构效关系

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Abstract:

考察了Ni基催化剂镍颗粒尺度与乙醇蒸汽重整活性、稳定性的构效关系.通过改良St?ber法制备了镍颗粒尺度可控的Ni@SiO2壳核型催化剂,研究了具有不同镍颗粒尺度的Ni@SiO2壳核型催化剂,发现催化剂乙醇转化频率随着镍颗粒尺度的增加而增加,当镍颗粒尺寸达到30nm以上时,变化不再明显.镍颗粒尺度对催化剂稳定性也有影响.镍颗粒尺度越大,催化剂积碳速率越快,稳定性越差.结果表明,适当的镍颗粒尺度对催化剂活性和稳定性均至关重要.

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