摘要
选择5种活性炭作为载体制备负载型钌催化剂,采用元素分析、物理吸附和化学吸附等表征手段,考察活性炭载体的化学组成和表面结构对钌催化剂金属分散状况的影响。以不同活性炭为载体制备了一系列钡助催钌催化剂,并在450℃、10 0MPa条件下进行氨合成活性评价。研究结果表明,活性炭载体的原材料及其制备工艺决定了载体的化学组成和表面结构,以具有高纯度、较大比表面积、较大比孔容和适当孔结构分布的活性炭为载体制备的钌催化剂具有较高的氨合成催化活性。
Rutheniumbased ammonia synthesis catalysts were prepared using five kinds of commercial activated carbon as the carriers. Elemental analysis, physical adsorption and chemical adsorption was carried out to investigate microstructure of the active carbon and dispersion of ruthenium on the catalysts. The activity of bariumpromoted Ru/C catalysts was tested at 450 ℃ and 100 MPa. It was found that raw material and preparation procedure of the activated carbon has great influence on the composition and surface structure of rutheniumbased catalyst. Ruthenium catalysts supported on the activated carbon with high purity, high surface area, large pore volume and appropriate pore structure usually exhibited higher activity for ammonia synthesis.
出处
《工业催化》
CAS
2003年第7期45-48,共4页
Industrial Catalysis
基金
福建省科技厅基础研究重大项目(2 0 0 0F0 0 2 )
福州大学科技发展基金项目 [XKJ(QD)0 1 0 2 ]。
