Method for preparing olefin, aromatic hydrocarbon and hydrogen through co-catalytic conversion of methane and ethane

Abstract

The invention relates to a method for preparing olefin, aromatic hydrocarbon and hydrogen through co-catalytic conversion of methane and ethane by a quartz catalytic reactor. According to the process,efficient co-conversion of methane and ethane is realized, methane conversion is efficiently promoted by ethane, the catalyst stability is high, and zero carbon deposition is generated. According tothe method, the conversion rate of methane is 20-70%; the olefin selectivity is 60 to 90 percent; the aromatic hydrocarbon selectivity is 10-40%; carbon deposition is zero. The method has the characteristics of long service lifetime of the catalyst, good oxidation reduction and hydrothermal stability of the catalyst at high temperature (lower than 1700 DEG C), high methane conversion rate and product selectivity, zero carbon deposition, no need of amplification of the catalyst, low industrialization difficulty, easiness in separation of the product, good process repeatability, safety and reliability in operation and the like, and has a wide industrial application prospect.

Description

technical field [0001] The invention relates to a method for the co-catalytic conversion of methane and ethane into olefins, aromatics and hydrogen in a quartz catalytic reactor. Zero carbon build-up. Background technique [0002] The development and effective utilization of natural gas (methane) resources represents the development direction of the contemporary energy structure, and is also one of the important ways to ensure sustainable development and energy greening. In recent years, developed countries in the West have also made breakthroughs in the development of shale gas and "combustible ice", and a "shale gas revolution" has broken out. There are many types of shale gas resources in my country, and the distribution is relatively concentrated. The recoverable resource potential is 25 trillion cubic meters (excluding the Qinghai-Tibet area), which is equivalent to the conventional natural gas in my country's land area and similar to the 24 trillion cubic meters in th...

AI Technical Summary

Problems solved by technology

For the selective oxidation of methane to produce methanol or formaldehyde, since the oxidation rate of the target product methanol and formaldehyde is much faster than that of the raw material methane, the selectivity of the reaction is low and it is difficult to apply on a large scale

[0008] Two patents (application numbers: 201310174960.5, 201511003407.0 and 201511003407.0) have been applied in the early stage. These two patents mainly apply for a metal-doped silicon-based catalyst, which is then placed in the reactor as a fixed bed, fluidized bed or moving bed. The process of catalytic conversion of methane to olefins; the disadvantages of these two methods are that the pressure drop of the catalyst bed is large, the heat conduction of the catalyst is poor, the temperature difference of the bed is large, and the catalyst preparation conditions are harsh and difficult to scale up.

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