The Studies Of Simultaneous Production Of Ethylene And Syngas From Methane Partial Oxidation

With the shortening of petroleum, it becomes very necessary to exploit and utilize natural gas which has relatively large reserves all through the world. Methane is the main component of natural gas, so the activation and transformation of it are paid great attention by chemists and chemical engineers all over the world. Presently, the methods of methane chemical utilization can be divided into two kinds:The indirect routes and the direct routes, and the indirect routs are more mature. Methane indirect converting routes include the preparation of syngas and the conversion of syngas to more valuable chemicals and oils. Methane indirect converting routes have many drawbacks such as:High energy consuming, complex process and high producing cost. The direct conversion of methane is attractive, for the organic chemicals can be produced by one step. However, methane is the most stable organic molecular and is very difficult to be activated. In the process of methane direct conversion, the products are often more reactive than methane, so the selectivity of partial oxidation product could not generally reach high levels.In this work, a new strategy of methane utilization was raised to produce syngas and ethylene simultaneously by combining the reactions of methane oxidative coupling and its partial oxidation ( and carbon dioxide reforming of methane), that is, methane was partially oxidized with oxygen, or both oxygen and carbon dioxide to produce syngas and ethylene simultaneously. Through the optimization of catalysts and reaction conditions, the mixture with a mole ratio of CO/H2/C2H4=1/1/1 will be achieved, which could be directly used in the propanal...