氢化菲在 REUSY 分子筛催化剂上的反应性能

采用小型固定流化床装置考察了二氢菲、八氢菲和全氢菲在分子筛催化剂上的裂化反应产物，并进行了对比分析。结果表明，在 REUSY 分子筛催化剂上，二氢菲主要发生脱氢缩合反应，生成菲、芘等三环以上多环芳烃甚至焦炭，并阻碍了作为溶剂的正庚烷的裂化；八氢菲、全氢菲主要发生环烷环开环反应，八氢菲的环烷环开环反应产物中乙烯、丙烯、丁烯等 C₂~C₄烃以及烷基苯的氢转移反应产物萘、烷基萘等 C1₀烃的收率较高，全氢菲的环烷环开环反应产物中环己烷、烷基苯等汽油组分烃的收率较高；另外，较少量的八氢菲、全氢菲通过脱氢缩合生成菲、芘等三环以上多环芳烃甚至焦炭。氢化菲氢化程度越高越容易发生环烷环开环反应，氢化程度越低越容易发生脱氢反应生成三环以上多环芳烃和焦炭，且氢化程度过低还会抑制饱和烃的裂化。

Reaction Performance of Hydrophenanthrene Over REUSY Zeolite Catalysts

Experiments of dihydrophenanthrene,octohydrophenanthrene and perhydrophenanthrene cracking over REUSY zeolite catalysts under certain reaction temperature and catalyst/oil mass ratio were conducted on a small fixed fluidized bed unit to investigate and compare the products.The experimental results showed that the dehydrogenation condensation reactions were the main reactions of dihydrophenanthrene over zeolite catalysts,the products of which were polycyclic aromatics with more than three rings(phenanthrenes,pyrenes and so on) and coke,and thus the cracking of n-heptane solvent was held back.The naphthenic ring opening reactions were the main reactions of octohydrophenanthrene and perhydrophenanthrene over zeolite catalysts.For octohydrophenanthrene the products with higher yields in its naphthenic ring opening reactions were C2-C4 hydrocarbons,such as ethylene,propylene,butylenes,and naphthalene and alkyl naphthalene from hydrogen transfer reaction of alkyl benzenes,while for perhydrophenanthrene were mainly those gasoline hydrocarbons such as cyclohexane,alkylbenzene and so on.Less polycyclic aromatics with more than three rings(phenanthrenes,pyrenes and so on) and coke were produced by dehydrogenation condensation reactions of octohydrophenanthrene and perhydrophenanthrene.The deeper hydrotreated the hydrophenanthrene was,the easier the naphthenic ring opening reactions occurred.The less hydrotreated the hydrophenanthrene was,the easier the dehydrogenation reactions occurred to form polycyclic aromatics with more than three rings and coke.When much less hydrotreated hydrophenanthrene was used as raw material in catalytic cracking,the cracking of saturated hydrocarbon could be held back.