Method for producing ethylene and ethane and catalytic reactor

Abstract

The invention relates to a method for producing ethylene and ethane and a catalytic reactor, belonging to the technical field of lower hydrocarbon. The method comprises the following steps of: carrying out first methane catalytic conversion reaction on a methane-rich feed gas and an oxidizing gas by using a first section of granular catalytic agent, carrying out second methane catalytic conversion reaction on the gas mixture entering a second integrated type catalytic agent reaction section after supplementing the oxidizing gas in a reaction gas mixture, and finally collecting a reaction product. A premixing chamber which is provided with a feed gas inlet and an oxidizing gas inlet is arranged at the top of the catalytic reactor; a first reactor in which a granular catalytic agent is placed is communicated with the lower end of the premixing chamber; an oxidizing gas replenisher is communicated with the first reactor; a second reactor in which an integral catalytic agent is placed is communicated with the oxidizing gas replenisher; and a product outlet is arranged at the lower end of the second reactor. The catalytic reactor has the advantages that the single-pass methane conversion rate of the methane catalytic conversion reaction is increased, the technological process is short, the operation is stable, and the equipment investment is few.

Description

technical field [0001] The invention relates to a method for preparing ethylene and ethane and a catalytic reactor for realizing the method, belonging to the technical field of low-carbon hydrocarbons. Background technique [0002] Methane-rich coalbed methane, natural gas, and biogas are important resources. In addition to being directly used as fuel, they can be converted into basic chemical raw materials such as ethylene and ethane through catalytic conversion, which can greatly increase their added value and reduce oil consumption. Catalytic conversion methods can be divided into indirect method and direct method. [0003] The indirect method is to first catalytically convert the methane-rich feed gas into synthesis gas (mainly CO and H 2 ), and then the synthesis gas is made into raw materials such as methanol, dimethyl ether, and low-carbon hydrocarbons, and finally low-carbon olefins such as ethylene are produced by catalytic conversion. Its main problems are too lo...

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Problems solved by technology

The main problems are that the process flow is too long, the energy consumption is high, and the production efficiency is low.

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