Method for converting methane into aliphatic hydrocarbons, fuel cell and fuel cell preparation method

Abstract

The invention provides a method for converting methane into aliphatic hydrocarbon, a fuel cell and a method for preparing the fuel cell. The method for converting methane into aliphatic hydrocarbon ischaracterized in that the fuel cell is established, an oxygen-containing material is used to purge a cathode of the fuel cell, and an electrochemical reaction is carried out to generate oxygen ions;the oxygen ions are moved to an anode of the fuel cell through an electrolyte, the anode contains a methane oxidative coupling catalyst, when the methane-containing feed flow purges the anode of the fuel cell, the methane is subjected to a coupling reaction under the action of the oxygen ions and the methane oxidative coupling catalyst to generate aliphatic hydrocarbon. The fuel cell comprises thecathode, a cathode transition layer, the electrolyte and the anode. The anode is composed of the methane oxidative coupling catalyst and an inert conductive metal material, the electrolyte is an oxygen ion conductor type ceramic material, and the cathode transition layer is a mixture of the cathode and an electrolyte material. The method of the invention has high selectivity to hydrocarbon products and improves reaction safety.

Description

technical field

[0001] The invention belongs to the field of natural gas conversion and utilization, and specifically relates to a catalyst preparation method for catalyzing the aerobic conversion of methane into low-carbon olefins and alkanes and an integrated device for in-situ oxygen supply and combined power generation using a high-temperature oxide fuel cell. Background technique

[0002] As the main component of natural gas, methane is the smallest and most stable member of the hydrocarbon family. Due to its high carbon-hydrogen bond energy, low reactivity, and difficulty in processing and utilization, it is difficult to directly use it as a chemical raw material compared with other higher molecular weight hydrocarbons. Both ethylene and ethane are important basic chemical raw materials, among which ethylene is the most important. In my country, crude oil is still the main raw material for the production of ethylene. The cost of ethylene is greatly affected by the fl...

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