Dehydrogenation of cyclohexane over Ni based catalysts supported on activated carbon using spray-pulsed reactor and enhancement in activity by addition of a small amount of Pt
Dehydrogenation of cyclohexane over Ni based catalysts supported on activated carbon using spray-pulsed reactor and enhancement in activity by addition of a small amount of Pt
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DOI：
10.1007/s10562-005-8009-x
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发表时间：
2005-11-01
影响因子：
2.8
通讯作者：
Ichikawa, M
中科院分区：
文献类型：
--
作者：
Biniwale, RB;Kariya, N;Ichikawa, M
在喷雾脉冲反应器中，以环己烷脱氢制苯为目标反应，研究了Ni/活性炭布ACC（Ni/ACC）催化剂的析氢性能。当Ni负载量为20%（重量）时，单组分Ni/ACC催化剂的最大析氢速率为8.5 mmol g（cat）（-1）min（-1）。将少量的Pt（0.5wt%）加入到Ni基催化剂中。在促进的催化剂的情况下，观察到协同效应，氢产量增加约。1.5与仅含20重量% Ni的催化剂相比，与0.5wt%的Pt/Ni催化剂相比，20wt%的Ni-0.5wt%的Pt/Ni催化剂表现出约100%的催化活性。氢气产量提高60倍。通过向Ni/ACC催化剂中添加Pt，观察到对脱氢的选择性增强。
Dehydrogenation of cyclohexane to benzene has been carried out over Ni supported on activated carbon cloth ACC (Ni/ACC) catalysts under spray-pulsed mode reactor to study hydrogen evolution for hydrogen storage and supply system applications. The maximum rate of hydrogen evolution using monometallic Ni/ACC catalysts was 8.5 mmol g(cat)(-1) min(-1) for Ni loading of 20% by weight. A small amount of Pt (0.5 wt%) was added to the Ni based catalysts. A synergistic effect was observed in the case of the promoted catalysts the hydrogen production was enhanced by ca. 1.5 times as compared to the 20 wt% Ni only catalyst. As compared to 0.5 wt% monometallic Pt catalyst, the 20 wt% Ni-0.5 wt% Pt bimetallic catalyst exhibits ca. 60 times higher hydrogen production rates. Selectivity towards dehydrogenation observed to be enhanced by addition of Pt into Ni/ACC catalysts.