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Nano-molybdenum-based sulfur-tolerant methanation catalyst, preparation method and application

A technology based on sulfur-resistant methane and catalyst, which is applied in the field of sulfur-resistant catalyst and its preparation, can solve the problems of inability to apply methanation process, low methane selectivity, poor sulfur resistance, etc., and achieves high stability, high methane selectivity, Good mechanical strength

Active Publication Date: 2016-07-20
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing sulfur-tolerant methanation catalysts generally have the characteristics of low activity, low methane selectivity, poor stability, and poor sulfur tolerance, and cannot be applied to the methanation process of coal-to-substitute natural gas

Method used

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  • Nano-molybdenum-based sulfur-tolerant methanation catalyst, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Weigh 100g of cyclohexane, 50g of cetyltrimethylammonium bromide, and 25g of n-butanol, and stir well to form an oil phase solution; weigh a certain amount of ammonium molybdate and dissolve it in deionized water to form a concentration of 0.01mol / L solution, add a certain amount of citric acid, make the molar ratio of citric acid and molybdenum atom be 10, stir until evenly, get ammonium metavanadate, manganese nitrate (50wt% solution) in addition and be dissolved in with above-mentioned solution, form mixed For solution A, add the mixed solution A dropwise to the above oil phase solution at a rate of 2mL / min, and stir while adding dropwise to form a microemulsion system. Take another sodium carbonate to make a 30wt% solution, add dropwise to the above microemulsion system until the pH value is 8.0, after the reaction is completed, age the mixed solution at 25°C for 24 hours, centrifuge at 5000r / min for 10min, and remove the upper layer After clearing the night, wash ...

Embodiment 2

[0056] Weigh 100g of hexane, 25g of polyethylene glycol octylphenyl ether (TritonX-100) and 25g of n-pentanol, and stir well to form an oil phase solution; weigh a certain amount of ammonium molybdate and dissolve it in deionized water to form a concentration of To a solution of 0.1mol / L, add a certain amount of citric acid so that the molar ratio of citric acid to molybdenum atoms is 5, stir until uniform, and then dissolve ammonium tungstate, ammonium chromate, and ferric nitrate in the above solution to form a mixed For solution A, add the mixed solution A dropwise to the above oil phase solution at a rate of 5mL / min, and stir while adding dropwise to form a microemulsion system. Take another sodium carbonate to make a 30wt% solution, add it dropwise to the above-mentioned microemulsion system until the pH value is 9.0, after the reaction is completed, age the mixed solution at 50°C for 3h, centrifuge at 1000r / min for 30min, remove the supernatant , washed with absolute eth...

Embodiment 3

[0058] Weigh 100g of heptane, 33.3g of dioctadecyldimethylammonium chloride (DODMAC), and 33.3g of n-hexanol, stir well to form an oil phase solution; weigh a certain amount of molybdenum chloride and dissolve it in deionized water to form Add a certain amount of citric acid to a solution with a concentration of 0.5mol / L, so that the molar ratio of citric acid to molybdenum atoms is 5, stir until uniform, and dissolve cobalt nitrate, cerium nitrate, and magnesium nitrate in the above solution to form a mixed solution A. Add the mixed solution A dropwise to the above oil phase solution at a rate of 10mL / min, and stir while adding dropwise to form a microemulsion system. Take another potassium nitrate to make a 30wt% solution, add it dropwise to the above microemulsion system until the pH value is 10.0, after the reaction is completed, age the mixed solution at 80°C for 1h, centrifuge at 3000r / min for 10min, remove the supernatant , washed with absolute ethanol until there is no...

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Abstract

A nano-molybdenum-based sulfur-tolerant methanation catalyst takes metal Mo as the main active component.A second active component metal M1 and an additive metal M2 are added on the basis of the main active component, and the catalyst is prepared from, by mass, 5%-55% of M, 2%-50% of M1, 0.2%-20% of M2 and the balance oxygen atoms.The nano-molybdenum-based sulfur-tolerant methanation catalyst has the advantages of being simple in preparation, high in sulfur-tolerant capacity, high in methanation activity, good in stability and free of carbon deposition.

Description

technical field [0001] The invention belongs to a sulfur-resistant catalyst and its preparation method and application, in particular to a nano-molybdenum-based sulfur-resistant methanation catalyst for coal-based natural gas substitutes, its preparation method and application. Background technique [0002] "Coal-rich, oil-poor, and gas-poor" is the structural feature of our country, which determines the coal-based consumption pattern in our country. The distribution of coal resources in my country is very unbalanced, mainly distributed in the northern and central and western regions, and the reserves in the economically developed coastal areas in the southeast are very small. Most of my country's coal reserves are low-rank coals, which are not suitable for long-term storage and long-distance transportation. Natural gas is a clean energy with safe use and high calorific value. In recent years, the proportion of natural gas in my country's energy consumption structure has in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J23/887B01J23/888B01J37/20C10L3/08
CPCB01J23/002B01J23/34B01J23/8871B01J23/8872B01J23/8885B01J37/20B01J2523/00C10L3/08B01J2523/68B01J2523/55B01J2523/72B01J2523/12B01J2523/69B01J2523/67B01J2523/842B01J2523/13B01J2523/845B01J2523/3712B01J2523/22B01J2523/847B01J2523/3706B01J2523/25B01J2523/11B01J2523/23
Inventor 李德宝林明桂侯博贾丽涛鲁怀乾张庆庚崔晓曦蓸会博
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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