采用等体积浸渍法制备了一系列Ru-Nd/ Al2O3氨合成催化剂.通过TPD、CO化学脉冲吸附法等手段研究了Nd对催化剂的性能影响.结果表明,Nd的加入抑制了H2的吸附,促进了N2的解离吸附,同时修饰了载体,使Ru金属分散度提高.研究还表明,当Nd的含量在8%左右,反应温度在475℃时,催化剂的活性最高.
参考文献
| [1] | Aika K;Kubotaa J;Niwa Y .Molecular sensing techniques for the characterization and design of new ammonia catalysts[J].Surface Science Applications,1997,121-122:488-491. |
| [2] | Kowalczyk Z;Jodzis S;Jodzis W .Effect of potassium and barium on the stability of a carbon-supported ruthenium catalyst for the synthesis of ammonia[J].Applied Catalysis A:General,1998,173:153-160. |
| [3] | Aika K;Shimazaki K;Hattor Y et al.Support and promoter effect of ruthenium catalyst 1[J].Journal of Catalysis,1985,92:296-304. |
| [4] | Aika K;Kumasaka M;Oma T .Support and promoter effect of ruthenium catalyst 3[J].Applied Catalysis,1996,28:57-68. |
| [5] | Claus J.H.Jacobsen .Boron Nitride:A Novel Support for Ruthenium-Based Ammonia Synthesis Catalysts[J].Journal of Catalysis,2001(1):1-3. |
| [6] | Aika K;Takano T;Murata S .Preparation and characterization of chlorine-free ruthenium catalysts and the promoter effect in ammonia synthesis[J].Journal of Catalysis,1992,136(01):126-140. |
| [7] | Kadowaki Y.;Aika K. .PROMOTER EFFECT OF SM2O3 ON RU/AL2O3 IN AMMONIA SYNTHESIS[J].Journal of Catalysis,1996(1):178-185. |
| [8] | J D 李氏.新编简明无机化学[M].北京:人民出版社,1982:494. |
| [9] | 林河成.氧化钕生产及应用市场[J].稀土,2003(02):74-77. |
| [10] | Kowalczyk Z;Jodzis S;Sentek J .Studies on kinetics of ammonia synthesis over ruthenium catalyst supported on active carbon[J].Applied Catalysis A:General,1996,138:83-91. |
| [11] | 罗来涛,李松军,黄冰峰,李凤仪.稀土对Ru基加氢催化剂的改性研究[J].稀土,2003(02):24-29. |
| [12] | Sheng Guan;Hua Zhang Liu .Effect of an Iron Oxide Precursor on the N_2 Desorption Performance for an Ammonia Synthesis Catalyst[J].Industrial & Engineering Chemistry Research,2000(8):2891-2895. |
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