A Comparative Study of the Decomposition of Ethanol on Pt Metals Supported by Carbon
A Comparative Study of the Decomposition of Ethanol on Pt Metals Supported by Carbon
复制标题
碳负载Pt金属上乙醇分解的对比研究
DOI：
10.1007/s10562-009-9984-0
复制
发表时间：
2009
影响因子：
2.8
通讯作者：
F. Solymosi
中科院分区：
文献类型：
--
作者：
A. Gazsi;P. Tolmacsov;F. Solymosi;F. Solymosi
研究了乙醇在高比表面积碳负载金属铂上的分解反应。反应起始温度高于450℃，在673~723℃之间接近总转化率，主要产物为H_2、CO和CH_4。诺里特碳担载的所有金属的制氢选择性都在30%左右，乙醇中近40%的氢在全转化过程中转化为气态氢。根据周转频率，金属的效率顺序为：Ru>Pt；Pt；Ir；Rh；&>Pd。Norit负载的铂金属的一个有利特征是在723℃下10小时内没有发生失活，这与铂/Al_2O_3的行为相反。催化剂的高稳定性归因于缺乏生成乙酸酯所需的活性羟基，从而毒害了金属。在乙醇中加入水只略微提高了氢气的产量。
The decomposition of ethanol has been investigated on Pt metals supported by carbon Norit of high surface area. The reaction starts above 450 K and approaches total conversion at 673–723 K. The major products are H2, CO and CH4. The selectivity of hydrogen formation on all metals supported by carbon Norit scattered around 30%, and almost ~40% of the hydrogen content of ethanol has been converted to gaseous hydrogen at the total conversion. The order of the efficiency of the metals based on the turnover frequencies is Ru > Pt > Ir > Rh > Pd. An advantageous feature of the Norit-supported Pt metals is that no deactivation occurred at 723 K in 10 h, which is in contrast to the behaviour of Pt/Al2O3. The high stability of the catalysts is attributed to the lack of reactive OH groups required for the formation of acetate poisoning the metals. Adding water to ethanol only slightly improved the production of hydrogen.