Hydrogenation of carbon oxides toward methane and higher hydrocarbons can be catalyzed by several metal catalysts, including Ni [11-15], Ru [16-21] and Rh [20,22】 among others. Ru is believed to be the most active methanation catalysts. When it is dispersed on metal oxide carriers have been found to exhibit high activity for the solo-methanation of CO [10,18] or CO2 [15,23-27] as well as for the CO-methanation of CO/CO2 mixtures [18,20,25,28]. It has been reported [29] that the specific activity of Ru/Al2O3 for CO hydrogenation is about one order of magnitude higher, compared to that of Al2O3- supported Rh or Pd. Ruthenium (and also Rh and Ni) is also very active for hydrogenation of CO/CO2 mixtures in contrast to Pd or Pt, which tends to catalyze the RWGS reaction [12].
碳氧化物向甲烷和高级碳氢化合物的加氢反应可以通过几种金属催化剂来催化,包括Ni [11-15],Ru [16-21]和Rh [20,22]。Ru被认为是最活跃的甲烷化催化剂。当它分散在金属氧化物上时,发现载体对CO [10,18]或CO2 [15,23-27]的单甲烷化以及CO / CO2混合物的CO甲烷化显示出高活性[ 18,20,25,28]。据报道[29],与Al2O3负载的Rh或Pd相比,Ru / Al2O3对CO加氢的比活性高约一个数量级。与Pd或Pt相比,钌(以及Rh和Ni)对CO / CO2混合物的加氢也非常活跃,后者倾向于催化RWGS反应[12]。
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几种金属催化剂,包括Ni[11-15]、Ru[16-21]和Rh[20,22]等,可以催化碳氧化物加氢制甲烷和高碳烃。Ru被认为是最活跃的甲烷化催化剂。当它分散在金属氧化物载体上时,已发现其对CO[10,18]或CO2[15,23-27]的单独甲烷化以及CO/CO2混合物的共甲烷化具有高活性[18,20,25,28]。文献[29]报道,Ru/Al2O3的CO加氢比活性比Al2O3负载的Rh或Pd高一个数量级。钌(以及铑和镍)对于CO/CO2混合物的加氢也非常活跃,而Pd或Pt则倾向于催化RWGS反应[12]。<br>
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