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本文报导了在微型反应器中用模型化合物甲苯及正辛烷表征催化剂的加氢-脱氢及加氢裂解功能的方法。在甲苯中加入碱性氮化物可有效地抑制酸性载体引起的付反应,从而可较真实地表征加氢裂化催化剂的加氢功能。在表征不同类型催化剂的加氢裂解功能时,以无定形硅-铝为载体的催化剂需用较高的反应温度和纯正辛烷为原料;含分子筛催化剂则用较低的反应温度并在正辛烷中加入一定量的碱性氮化物,以便抑制催化剂过高的裂解活性。实验表明,采用建立的表征方法可以较好的区分加氢裂化催化剂的上述反应功能。
This paper reports the characterization of the catalysts for hydrogenation-dehydrogenation and hydrocracking using the model compounds toluene and n-octane in a microreactor. The addition of basic nitrides to toluene can effectively suppress the side reactions caused by acidic carriers, which can characterize the hydrogenation function of hydrocracking catalysts more faithfully. In the characterization of hydrocracking function of different types of catalysts, amorphous silicon-aluminum-based catalysts require higher reaction temperature and pure octane as raw materials; molecular sieve catalysts are used at lower reaction temperatures and in the octyl A certain amount of basic nitride is added to the alkane in order to suppress excessive catalyst cracking activity. Experiments show that, using the established characterization method can better distinguish the hydrocracking catalyst above reaction function.