十氢萘气相氧化裂解制低碳烯烃的研究

十氢萘气相氧化裂解（GOC）与传统的热裂解工艺相比，O2的存在降低了十氢萘GOC反应的活化能，使反应在较低温度下具有高的反应性能；O2同时起到消除积炭的作用，提高体系的抗积炭能力。十氢萘GOC反应在较低温度下即可获得较高的液体收率；高温下由于十氢萘裂解深度较高，低碳烯烃收率可高于液体收率，在所得的液体中，芳烃，尤其是BTX（苯、甲苯和二甲苯）占主要部分。十氢萘GOC反应制备低碳烯烃的适宜反应条件为，700℃~800℃，停留<0.4s，烷氧摩尔比0.3~0.5，空气可代替纯氧进料。800℃，烷氧摩尔比0.5，停留0.4s，可获得37％左右的低碳烯烃收率和50%左右的液体收率（BTX收率为29％）。

Study on lower alkene production by gas-phase oxidative cracking of decalin

High reaction performance and decoking ability were obtained in gas phase oxidative cracking (GOC) of decalin, as compared with its pyrolysis reaction. In the GOC process, high liquid yield could be achieved at a low temperature; while at high temperature, the yield of lower alkenes can overpass the yield of liquid, in which the aromatics, especially BTX (benzene, toluene and xylenes), dominated the overall liquid compositions. The optimal reaction conditions for GOC of decalin are: temperature 700℃~800℃, residence time<0.4s, molar ratio of decalin to oxygen 0.3~0.5, where pure oxygen can be replaced by air for GOC process. Under the conditions of 800℃, nC10)/n(O2)=0.5 and a residence time of 0.4s, the yields of lower alkenes, BTX, and total liquid products reache 37%, 29%, and 50%, respectively.