Catalyst for chemical looping partial oxidation of methane to syngas, preparation and application thereof

A catalyst and chemical chain technology, applied in the field of chemical chain partial oxidation methane to synthesis gas catalyst, can solve the problem of low selectivity of synthesis gas, and achieve high reactivity and excellent universality

Active Publication Date: 2019-06-04
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, due to the limitations of the preparation method, Fe 2 o 3 Cannot be completely covered by LSF, resulting in lower syngas selectivity than pure phase LSF

Method used

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  • Catalyst for chemical looping partial oxidation of methane to syngas, preparation and application thereof
  • Catalyst for chemical looping partial oxidation of methane to syngas, preparation and application thereof
  • Catalyst for chemical looping partial oxidation of methane to syngas, preparation and application thereof

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Experimental program
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Embodiment

[0028]Adopt sol-gel method, the La of stoichiometric ratio, Sr, Fe, Al nitrate precursor (the amount of cationic total substance is 20mmol) is added in the citric acid solution of 100ml concentration 0.4mol / L, with concentration 28% Ammonia to adjust the pH to 7. The above solution was evaporated to dryness in a water bath at 80°C to a gel state, dried at 150°C for 12 hours, and calcined at 1200°C for 4 hours to obtain La 1-x Sr x Fe 1- y Al y o 3-δ composite oxide catalyst.

[0029] Using the co-precipitation method, the stoichiometric ratio of La, Sr, Fe, Al nitrate precursors (the amount of the total cationic substance is 20mmol) was added to 100ml deionized water, heated to 60°C in a water bath, fully stirred and dissolved, and quickly added to Ammonium carbonate solution with a concentration of 1mol / L was added to the solution, the pH was 7, stirred rapidly, left to age, filtered, washed, dried at 80°C for 12h, and roasted at 1200°C or 900°C (Example 1) for 4h to ob...

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Abstract

The invention relates to a catalyst for chemical looping partial oxidation of methane to syngas, in particular to a composite oxide containing lanthanum, strontium, iron and aluminum, preparation andapplication thereof. Different metal precursors are mixed evenly in certain proportion and then roasted at certain temperature for certain period of time, thus obtaining the composite oxide catalyst.The catalyst provided by the invention has the characteristics of simple preparation method and good repeatability, can achieve high selectivity (greater than 90%) oxidation of methane to syngas in awide temperature range with the lattice oxygen of itself, also can be regenerated in air, water vapor, carbon dioxide, water/carbon dioxide mixed gas and other oxidizing atmosphere, and at the same time high-purity hydrogen, carbon monoxide or syngas and other high value-added products can be generated. After repeated circulation reaction, the catalyst reaction activity and syngas selectivity haveno obvious change, thus showing excellent cyclic stability. The invention provides the high efficiency and low cost catalyst for chemical looping partial oxidation of methane to syngas.

Description

technical field [0001] The invention relates to a catalyst for producing synthesis gas (mixture of hydrogen and carbon monoxide) by chemical chain partial oxidation of methane, in particular to a catalyst for chemical chain partial oxidation of methane for production of synthesis gas and its preparation and application. Background technique [0002] Converting methane, the main component of natural gas, into liquid fuels not only increases added value, but also facilitates product transportation. At present, the main means of producing liquid fuels from methane in industry is to first convert methane into synthesis gas, and then convert it into liquid chemicals through methods such as Fischer-Tropsch synthesis. At present, there are three main methods for producing syngas from methane, including steam reforming, carbon dioxide dry reforming and partial oxidation. Since both water vapor reforming and carbon dioxide drying are strong endothermic processes, a large amount of e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C01B3/40
CPCY02P20/52Y02P20/584
Inventor 王晓东黄传德林坚田鸣
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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