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OALib Journal期刊
ISSN: 2333-9721
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性能优异的Rh改性的Pd/Al2O3密偶催化剂
DOI: 10.1016/S1872-2067(14)60214-X, PP. 229-236
Keywords: 密偶催化剂,钯,铑,丙烷,直接氧化反应,还原反应,蒸汽重整反应
Abstract:
？采用等体积浸渍法制备了Pd/Al2O3和Rh-Pd/Al2O3密偶催化剂,运用H2程序升温还原、CO化学吸附和X射线光电子能谱等手段对催化剂进行了表征,并考察了催化剂对丙烷总包反应和单反应的转化活性.总包反应结果表明,Rh的添加使起燃温度和完全转化温度分别降低了23和18℃.单反应结果证明,添加Rh能提高各单反应丙烷的转化活性,尤其是有NO参与的反应.表征结果证明,掺杂Rh不仅可以抑制活性组分PdOx的烧结,提高PdOx的分散度,而且可以改变其电子状态.
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