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

A fuel cell, aliphatic hydrocarbon technology, applied in the direction of fuel cells, battery electrodes, circuits, etc., can solve the problems of poor safety and low selectivity of aliphatic hydrocarbons, and achieve improved safety, reduced membrane area, and fast oxygen supply rate. Effect

Active Publication Date: 2020-06-09
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The main purpose of the present invention is to provide a method for converting methane into aliphatic hydrocarbons, a fuel cell and a fuel cell preparation method to solve the problem of the conversion of natural gas into aliphatic hydrocarbons in the prior art that requires pure oxygen, poor safety, and aliphatic hydrocarbon selectivity. low level problem

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

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preparation example Construction

[0042] The present invention also discloses a method for preparing the above-mentioned fuel cell, and the preparation steps specifically include:

[0043] S1, the oxygen ion conductor type ceramic material powder is screened and then cold-pressed into tablets;

[0044] S2. Sintering the rough sheet prepared in S1 at high temperature to obtain a dense electrolyte sheet;

[0045] S3, mixing the cathode material and the electrolyte material powder, making slurry, coating one side of the electrolyte sheet in S2, and sintering at a high temperature to obtain an electrolyte-cathode transition layer;

[0046] S4, mixing the cathode material powder and the pore-forming agent, making slurry, coating the surface of the transition layer in S3, and sintering at a high temperature to obtain a porous cathode layer;

[0047] S5. Mixing the methane oxidative coupling catalyst and the inert conductive material to slurry and coating it on the other side of the electrolyte sheet in S2, and sint...

Embodiment 1

[0061] Barium carbonate catalyst was prepared by solution method: 7.415g magnesium nitrate Mg(NO 3 ) 2 (Sigma-Aldrich, product number 237175-100G, purity ≥ 99%) and 11.267g barium oxalate BaC 2 o 4 (Alfa Aesar, product number 13009, purity ≥ 99.999%) powder ground, poured into 100mL deionized water to prepare a mixed solution. After the solid powder is completely dispersed, heat at 80°C to concentrate and evaporate the liquid to obtain a uniformly mixed solid powder. The dry powder was placed in a muffle furnace and sintered in air at 800 °C for 4 hours to prepare MgO / BaCO 3 It is a methane oxidative coupling catalyst.

Embodiment 2

[0063] Preparation of lanthanum aluminum oxide catalyst by solution method: 4.33g lanthanum nitrate La(NO 3 ) 3 *6H 2 O (Sigma-Aldrich, product number 61520-100G-F, purity ≥ 99%), 3.375g aluminum nitrate Al (NO 3 ) 3 *9H 2 O (Sima-Aldrich, product number 237973-500G, purity ≥ 98%) and 0.256g magnesium nitrate Mg (NO 3 ) 2 *6H 2 O (Sigma-Aldrich, product number 237175-100G, purity ≥ 99%) powder was fully ground, poured into 100mL 0.5M citric acid aqueous solution to dissolve. After the solid is fully dissolved, gradually concentrate at 80°C and 100°C until the liquid evaporates completely. The evaporated powder was collected and transferred to a muffle furnace, the temperature was gradually raised to 800°C and air sintered for 5 hours to prepare a LaAlMgO-based methane oxidative coupling catalyst.

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B3/00H01M4/90H01M4/86H01M4/88
CPCC25B3/00H01M4/8605H01M4/881H01M4/8839H01M4/8889H01M4/90H01M4/9025H01M4/9075H01M8/1213H01M8/1231H01M8/1246H01M2008/1293Y02E60/50
Inventor 刘克峰孔繁华肖海成刘晓彤王林李庆勋鲁玉莹王宗宝娄舒洁
Owner PETROCHINA CO LTD
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