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Method for preparing nanometer Ni2O3/PG catalyst with coordination homogenizing precipitation method

A technology of coordinated uniform precipitation and catalyst, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, catalyst carrier, etc., can solve the problem of active component particle agglomeration load, high use cost, regeneration Difficulties and other problems, to achieve the effect of low toxicity, low price, and easy industrial production

Inactive Publication Date: 2015-09-30
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, elemental nickel metal is easy to poison, easy to deposit carbon, and easy to sinter, which makes it expensive to use, poor in heat resistance, easy to deactivate, and difficult to regenerate after deactivation
In addition, the general impregnation method and chemical precipitation method to prepare tar reforming catalysts will cause the disadvantages of active component particle agglomeration and uneven loading.

Method used

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  • Method for preparing nanometer Ni2O3/PG catalyst with coordination homogenizing precipitation method
  • Method for preparing nanometer Ni2O3/PG catalyst with coordination homogenizing precipitation method
  • Method for preparing nanometer Ni2O3/PG catalyst with coordination homogenizing precipitation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] [Ni(NH 3 ) 6 ] 2+ The instability constant for is:

[0031] Ni(NO 3 ) 2 .6H 2 O is dissolved in water to obtain a solution. Adding a certain volume of ammonia water with a mass fraction of 28% and a density of 0.87g / ml obtained the Ni 2+ , NH 3 , [Ni(NH3 ) 6 ] 2+ mixed solution. Assuming that after mixing [NH 3 ] is ymol / L, Ni 2+ The concentration is wmol / L, [Ni(NH 3 ) 6 ] 2+ The concentration is xmol / L.

[0032] For Ni(NO 3 ) 2 .6H 2 The reaction of O and ammonia water to form nickel ammonia complex:

[0033]

[0034] The configured volume is V 配 The nickel-ammonia complex solution, assuming the addition of ag Ni(NO 3 ) 2 .6H 2 Ni in solution after O 2+ with [Ni(NH 3 ) 6 ] 2+ The total concentration of is:

[0035]

[0036] Therefore, in solution, Ni 2+ The concentration w of is:

[0037] because

[0038] so:

[0039]

[0040] The relationship between coordination equilibrium and precipitation-dissolution equilibrium can b...

Embodiment 2

[0078] Configure 10Ni 2 O 3 / PG, based on the mass of the carrier attapulgite clay, set to weigh 10g of attapulgite clay as the carrier, so configure 10Ni 2 O 3 / PG requires Ni(NO 3 ) 2 .6H 2 O total 5.5g. Assuming that 100ml of nickel ammonia complex solution is prepared so that Ni 2+ All converted to the complex [Ni(NH 3 ) 6 ] 2+ , then the solution [Ni(NH 3 ) 6 ] 2+ The concentration x is 0.1893mol / L. NH is calculated by 3 The concentration y is 1.2610mol / L. Since the formation of nickel ammonia complexes requires the consumption of 1.1358mol / L of NH 3 , so the required ammonia should contain at least 0.2397mol of NH 3 , that is, at least 16.7ml of ammonia water with a mass fraction of 28% and a relative density of 0.87g / ml is required.

[0079] Since high nickel oxide is a non-stoichiometric compound, the loading is calculated as nickel. Weigh 5.5g of Ni(NO 3 ) 2 .6H 2 O is placed in a 100ml beaker, poured into ultrapure water to prepare a 30ml solutio...

Embodiment 3

[0082] Configure 14Ni 2 O 3 / PG, based on the mass of the carrier attapulgite clay, set to weigh 10g of attapulgite clay as the carrier, so configure 14Ni 2 O 3 / PG requires Ni(NO 3 ) 2 .6H 2 O total 8.1g. Assuming that 100ml of nickel ammonia complex solution is prepared so that Ni 2+ All converted to the complex [Ni(NH 3 ) 6 ] 2+ , then the solution [Ni(NH 3 ) 6 ] 2+ The concentration x is 0.2774mol / L, then the NH 3 The concentration y is 1.3611mol / L. Since the formation of nickel-ammonia complexes requires the consumption of 1.6644mol / L of NH 3 , so the required ammonia should contain at least 0.3026mol of NH 3 , that is, at least 21.1 ml of ammonia water with a mass fraction of 28% and a relative density of 0.87 g / ml is required.

[0083] Since high nickel oxide is a non-stoichiometric compound, the loading is calculated as nickel. Weigh 8.1g of Ni(NO 3 ) 2 .6H 2 O is placed in a 100ml beaker, poured into ultrapure water to prepare a 25ml solution. The...

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Abstract

The invention discloses a method for preparing a nanometer Ni2O3 / PG catalyst with a coordination homogenizing precipitation method. NH3.H2O is added into a Ni(NO3)2.6H2O solution to prepare a nickel ammonia coordination compound solution, the nickel ammonia coordination compound solution and attapulgite clay are mixed, a surface active agent is added dropwise, constant temperature heating and electromagnetic stirring are carried out, water is added to change sediment balance and dissolving balance, and therefore the Ni(OH)2 is precipitated, evenly separated and loaded on the surface of the attapulgite clay; finally, suction filtration, drying and calcining are sequentially carried out to prepare the nanometer Ni2O3 / PG catalyst. According to the preparing method, sources of the raw materials are abundant, the cost is low, the prepared reforming catalyst has the higher activity and the higher stability, the preparing process is simple, and the nanometer Ni2O3 / PG catalyst is suitable for industrial production.

Description

technical field [0001] The present invention relates to a kind of nano Ni 2 o 3 / PG catalyst preparation method. Background technique [0002] The biomass will produce tar during the gasification process, and the tar will have a very adverse effect on the biomass gasification process and related equipment. It reduces gasification efficiency, corrodes gasification equipment, blocks gas pipelines, and affects and endangers the operation and service life of subsequent gas-consuming equipment. Catalytic cracking can crack the tar in the gas produced by biomass gasification into small molecule gas at a lower temperature, so that the biomass energy can be used cleanly and efficiently. [0003] Traditional tar reforming catalysts use simple metal nickel as the active component, and use the principle that the electron holes in the 3d orbital of nickel atoms can accept the dissociated electrons of adsorbed molecules to form paired electrons, and have good tar conversion efficiency...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J32/00
Inventor 梁财谭震李鹏陈晓平吴守城季青
Owner SOUTHEAST UNIV
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