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Liquid-phase CO2 methanation catalyst, preparation method and application of catalyst

一种甲烷化催化剂、CO2的技术，应用在物理/化学过程催化剂、催化反应、化学仪器和方法等方向，能够解决催化剂强度下降、消耗较大能量、催化剂层侵蚀等问题，达到防止聚集、实现回收和循环利用、避免高温易脱落的效果

Active Publication Date: 2015-06-17
WUHAN KAIDI ENG TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past few decades, Ni-based catalysts have been widely studied as the most active methanation non-precious metal catalysts. Patents CN102091629 A and CN 101773833 A disclose nickel-based CO2 methanation catalysts, but This method not only needs to consume a lot of energy, but also the strength of the catalyst will decrease under high temperature and high partial pressure of water vapor, and the catalyst layer deposited on the surface of the substrate will also erode and fall off, while limiting CO2Application of Methanation Catalysts

Method used

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  • Liquid-phase CO2 methanation catalyst, preparation method and application of catalyst
  • Liquid-phase CO2 methanation catalyst, preparation method and application of catalyst
  • Liquid-phase CO2 methanation catalyst, preparation method and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] At room temperature, nickel nitrate, magnesium nitrate and 1-16 alkyl-3-methylimidazole hydrochloride ionic liquid are mixed and dispersed in water at a molar ratio of 1:0.2:20 to obtain a mixed system solution. The concentration of nickel nitrate in the system solution is 2.79×10 -4 mol / L, then add ammonia water to adjust the pH value of the system to 9.0, continue to stir and react for 3h, then transfer the reaction solution to the reactor at 150 o C, H at 3.0MPa 2 Reduce for 2h, finally centrifuge, filter, wash with water, wash with ethanol, and dry. After TEM test, see figure 1 . by figure 1 It can be seen that the liquid CO 2 The metal active component nanoparticles in the methanation catalyst have an average particle size of 11.8nm, a narrow particle size distribution and a uniform distribution.

[0029] Use the above catalyst for CO 2 The methanation reaction is specifically: add an appropriate amount of the above catalyst into the reaction kettle, and then add an a...

Embodiment 2

[0031] At room temperature, nickel acetate, lanthanum nitrate and 1-18 alkyl-3-methylimidazole hexafluorophosphate ionic liquid are mixed and dispersed in the liquid medium ethanol at a molar ratio of 1:0.15:20 to obtain a mixed system solution. The amount and concentration of the nickel acetate substance is 3.61×10 -4 mol / L, then add triethylamine to adjust the pH value of the system to 8.0, continue to stir and react for 2h, then transfer the reaction solution to the reactor at 100 o C, pass H under 3.0MPa pressure 2 It is reduced for 1.5h, and finally centrifuged, and then filtered, washed with water, washed with ethanol, and dried.

[0032] Use the above catalyst for CO 2 The methanation reaction is specifically as follows: add an appropriate amount of the above catalyst into the reactor, and then add an appropriate amount of solvent water, and control the concentration of the catalyst in the reaction system to 0.005mol / L, according to nH 2 : NCO 2 =4, access to CO 2 And H 2 , ...

Embodiment 3

[0034] At room temperature, nickel nitrate, cerium nitrate and amphiphilic ionic liquid N-dodecylpyridine tetrafluoroborate (C 12 PyBF 4 ) The molar ratio is 1:0.15:18, mixed and dispersed in the liquid medium acetonitrile to obtain a mixed system solution. The amount and concentration of nickel nitrate in the mixed system is 1.32×10 -3 mol / L, then add diisopropyl tert-butylamine to adjust the pH value of the system to 10.0, continue to stir and react for 3h, then transfer the reaction liquid to the reactor at 150 o C, pass H under 3.0MPa pressure 2 It is reduced for 1.5h, finally centrifuged, filtered, washed, and dried.

[0035] Use the above catalyst for CO 2 The methanation reaction is specifically: add an appropriate amount of the above catalyst into the reaction kettle, and then add an appropriate amount of solvent acetonitrile, control the concentration of the catalyst in the reaction system to 0.005mol / L, according to nH 2 : NCO 2 =4, access to CO 2 And H 2 , And then heate...

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Abstract

A liquid phase CO 2 methanation catalyst comprises amphipathic ionic liquid and metal active components dispersed in the amphipathic ionic liquid. The metal active components are in the state of stable colloid in the amphipathic ionic liquid, particle size is 0.5 to 20nm, and are in the shape of spherical. The metal active components include a first metal active component and a second metal active component. The first metal active component is nickel, the second metal active component is one or more of lanthanum, cerium, molybdenum, ruthenium, ytterbium, rhodium, palladium, platinum, potassium and magnesium, and the molar ratio of the first metal active component to the second metal active component is 10:0.1-2. Also provided are a preparation method of the liquid phase CO 2 methanation catalyst and a use for CO 2 methanation thereof.

Description

technical field [0001] The invention relates to the field of catalytic synthesis and nanomaterials, in particular to a liquid phase CO 2 Methanation catalyst, preparation method and application thereof. Background technique [0002] Natural gas is a high-quality, clean energy and efficient hydrocarbon resource. With the acceleration of urbanization and the improvement of people's living standards, people's demand for natural gas is growing rapidly. There is a large gap between the supply and demand of natural gas. As an effective way to transform high-carbon energy into low-carbon, hydrogen-rich energy, synthetic natural gas technology has good environmental and economic benefits. [0003] Meanwhile, in recent years, CO 2 Increased emissions contribute to global warming, reducing CO 2 Methanation can not only solve CO 2 emissions, and high-quality, clean energy can be synthesized, so CO 2 Methanation reactions have attracted widespread attention. In the past few deca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/02B01J31/06C07C9/04C07C1/12
CPCC07C1/12B01J2231/625B01J31/0284B01J31/28B01J31/34B01J31/06B01J23/78B01J23/83B01J23/883B01J23/892B01J35/23C07C9/04B01J31/0285B01J2531/847
Inventor 张岩丰詹晓东郑兴才王志龙方章建薛永杰陶磊明
Owner WUHAN KAIDI ENG TECH RES INST CO LTD
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