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A kind of CO selective methanation nickel-based catalyst based on SBA-16 and preparation method thereof

A nickel-based catalyst, methanation technology, applied in catalyst activation/preparation, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of insufficient Ni-based catalyst activity and high reaction temperature, and achieve excellent CO low-temperature methanation activity, The effect of low preparation cost and good application prospect

Active Publication Date: 2021-05-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention provides a nickel-based catalyst (Ni / Ti-SBA-16 catalyst) based on SBA-16 for the shortcomings of existing Ni-based catalysts such as insufficient activity and high reaction temperature.

Method used

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  • A kind of CO selective methanation nickel-based catalyst based on SBA-16 and preparation method thereof
  • A kind of CO selective methanation nickel-based catalyst based on SBA-16 and preparation method thereof
  • A kind of CO selective methanation nickel-based catalyst based on SBA-16 and preparation method thereof

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Effect test

Embodiment 1

[0045] A kind of preparation method of the CO selective methanation nickel-based catalyst based on SBA-16 that embodiment 1 provides, comprises the steps:

[0046] (1) Add 0.46mL of isopropyl titanate to 4.6mL of isopropanol, and mix evenly to obtain an isopropyl titanate solution; disperse 0.5g of mesoporous molecular sieve SBA-16 in 10mL of isopropanol, and disperse evenly to obtain a dispersed solution; mix the above-mentioned dispersion liquid and isopropyl titanate solution, stir evenly at room temperature for 3 hours, add deionized water drop by drop, the amount of deionized water added is 4.6mL, stir again evenly, stirring time After 3 hours, the precipitate was collected by filtration, and then washed with absolute ethanol for 3 times, dried at 100°C for 12 hours, and then calcined in a muffle furnace at 550°C for 3 hours to obtain the catalyst carrier Ti-SBA-16.

[0047] (2) 0.20g Ni(NO 3 ) 2 ·6H 2 O was added in 10mL of absolute ethanol, and mixed evenly to obtain...

Embodiment 2

[0051] A kind of preparation method of the CO selective methanation nickel-based catalyst based on SBA-16 that embodiment 2 provides, comprises the steps:

[0052] (1) Add 0.19mL isopropyl titanate to 1.9mL isopropanol, mix well to get isopropyl titanate solution; disperse 0.5g mesoporous molecular sieve SBA-16 in 10ml isopropanol, disperse evenly to get dispersed solution; mix the above-mentioned dispersion liquid and isopropyl titanate solution, stir evenly at room temperature for 2 hours, add deionized water dropwise, the amount of deionized water added is 1.9mL, stir evenly again, stir The time was 2 hours, and the precipitate was collected by filtration, and then washed with absolute ethanol for 3 times, dried at 120°C for 12 hours, and then calcined in a muffle furnace at 550°C for 3 hours to obtain the catalyst carrier Ti-SBA-16.

[0053] (2) 0.20gNi(NO 3 ) 2 ·6H 2 O was added in 10mL of absolute ethanol, and mixed evenly to obtain Ni(NO 3 ) 2 ·6H 2 The dehydrated...

Embodiment 3

[0057] A kind of preparation method of the CO selective methanation nickel-based catalyst based on SBA-16 that embodiment 3 provides, comprises the steps:

[0058] (1) Add 0.56mL of isopropyl titanate to 5.6mL of isopropanol, and mix well to obtain an isopropyl titanate solution; disperse 0.5g of mesoporous molecular sieve SBA-16 in 10mL of isopropanol, and disperse evenly to obtain a dispersed solution; mix the above-mentioned dispersion liquid and isopropyl titanate solution, stir evenly at room temperature, stirring time is 4h, add deionized water drop by drop, the amount of deionized water added is 5.6mL, stir again uniformly, stirring time After 4 hours, the precipitate was collected by filtration, and then washed with absolute ethanol for 3 times, dried at 110°C for 12 hours, and then calcined in a muffle furnace at 550°C for 3 hours to obtain the catalyst carrier Ti-SBA-16.

[0059] (2) 0.20gNi(NO 3 ) 2 ·6H 2 O was added in 10mL of absolute ethanol, and mixed evenly ...

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Abstract

The invention discloses a nickel-based catalyst for CO selective methanation based on SBA-16 and a preparation method thereof. The catalyst active component is Ni, and the carrier is Ti-SBA-16 doped with Ti. The method comprises using isopropyl titanate dissolved in an organic solvent as a titanium source, fully adsorbing it on the surface of the mesoporous molecular sieve SBA-16, and then preparing the Ti-doped mesoporous molecular sieve Ti-SBA-16 by a hydrolysis method, Finally, the Ni / Ti-SBA-16 catalyst was prepared by loading the active component Ni on the Ti-SBA-16 carrier by impregnation method. The catalyst provided by the invention has uniform distribution of Ti, high dispersibility and stability of Ni, and can reduce the CO content of 1 vol% in the hydrogen-rich reformed gas to below 10 ppm at a relatively low temperature (170-210° C.). , and the selectivity is higher than 50%, which can be applied to the purification of hydrogen-rich fuel gas in proton exchange membrane fuel cells.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a SBA-16-based CO selective methanation nickel-based catalyst and a preparation method thereof. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is expected to become one of the most competitive power sources to replace gasoline internal combustion engine vehicles due to its advantages of high efficiency, low pollution, low operating temperature, fast start-up, and high power density. Liquid fuels, such as methanol and gasoline, are used to supply fuel for fuel cell electric vehicles through the carried reformer, which solves the problems in vehicle, storage and transportation of pure hydrogen fuel. At present, the PEMFC electrode material is generally Pt, because the Pt electrode is very sensitive to CO, and a small amount of CO can irreversibly poison it and reduce the performance of the battery. The content of CO in the hydroge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/03B01J37/02B01J37/08B01J37/18C07C1/04C07C9/04
CPCB01J29/0333B01J37/0201B01J37/082B01J37/18B01J2229/18C07C1/044C07C9/04
Inventor 董新法赵华耿建铭万银备
Owner SOUTH CHINA UNIV OF TECH