Hydrogenation/dehydrogenation of polycyclic aromatic hydrocarbons using ammonium tetrathiomolybdate as catalyst precursor

被引:29
作者
Dutta, RP
Schobert, HH
机构
[1] Fuel Science Program, 209 Academic Projects Building, Pennsylvania State University, University Park
关键词
hydrogenation; dehydrogenation; polycyclic aromatic hydrocarbons; ammonium tetrathiomolybdate as catalyst precursor;
D O I
10.1016/0920-5861(96)00084-3
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The hydro enation and dehydrogenation behavior of naphthalene, phenanthrene, and pyrene using ammonium tetrathiomolybdate as a catalyst precursor were investigated via their product distribution and kinetic/thermodynamic parameters. Hydrogenation reactions were carried out in 25 ml microautoclave reactors at 350, 400, and 450 degrees C for various times up to equilibrium conditions. A lumped kinetic model was used to determine forward and reverse rate constants, which were then used to determine Arrhenius parameters. Enthalpy data were obtained and compared to values calculated in the literature. It was found that the temperature where dehydrogenation of hydroaromatics became favorable over hydrogenation reactions decreased with increasing ring size. This was also shown by an increasing thermodynamic control over the reactions as ring size increased.
引用
收藏
页码:65 / 77
页数:13
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