A method for the co-catalytic conversion of methane and ethane into olefins, aromatics and hydrogen

Abstract

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. Carbon deposits are formed. The conversion rate of methane in the invention is 20-70%, the selectivity of olefins is 60-90%, the selectivity of aromatics is 10-40%, and zero carbon deposit. The invention has the advantages of long catalyst life, good oxidation-reduction and hydrothermal stability at high temperature (<1700°C), high methane conversion rate and product selectivity, zero carbon deposition, no need for catalyst amplification, low industrialization difficulty, easy separation of products, and process It has the characteristics of good repeatability, safe and reliable operation, etc., and has broad industrial application prospects.

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 guarantee sustainable development and green energy. In recent years, Western developed countries 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 the Un...

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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