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A kind of preparation method of nickel-based catalyst

A nickel-based catalyst, nickel-aluminum alloy technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve carbon deposition, low-temperature catalytic activity, poor selectivity It can solve the problem of low reactivity and achieve the effect of high reactivity, uniform mixing of components and good H2 selectivity

Inactive Publication Date: 2016-08-31
CHINA JILIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ma Yan of North China Electric Power University used redox method to pretreat Ni 3 Al foil; 3 Al foil placed in 873K, flow rate 30ml / min steam for 1h; then at 873K, flow rate 30ml / min of 14%H 2 / N 2 1h. Ni after treatment 3 The catalytic activity of Al is significantly improved (Ma Yan.Ni 3 Catalytic activity of Al foil in methane reforming reaction. Acta Chemica Sinica, 2011, 69: 122-126). However, nickel-aluminum alloy compounds still have active properties in hydrocarbon reforming or cracking as nickel / alumina catalysts. Carbon severe, H 2 Low selectivity, poor catalytic activity at low temperature, etc.

Method used

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  • A kind of preparation method of nickel-based catalyst
  • A kind of preparation method of nickel-based catalyst
  • A kind of preparation method of nickel-based catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation method of a nickel-based catalyst, the composition of which is designed as:

[0025] System 1: Ni 3 Al, 1mol; tin nitrate, 0.05mol;

[0026] System 2: Ni 3 al 2 , 1mol; platinum nitrate, 0.05mol;

[0027] System 3: NiAl, 1mol; Palladium acetate, 0.05mol;

[0028] System 4: Ni 3 al 5 , 1mol; rhodium nitrate, 0.05mol;

[0029] The specific steps are: 1), preparing single-phase nickel-aluminum alloy sheet by smelting method; and preparing nickel-aluminum alloy sheet by cold rolling and stretching; the thickness of the alloy sheet is 5um; 2), the nickel-aluminum alloy sheet of step (1) Put into 40wt% NaOH solution and treat for 10h; the reaction temperature is 120°C, the reaction product is centrifuged and washed 3 times with distilled water; 3), the product obtained in step (2) is immersed in the doping salt solution, and vacuum-dried at 100°C for 5h; 4) , sintering the product obtained in step (3) in high-temperature air, the sintering temperature is...

Embodiment 2

[0032] A kind of preparation method of nickel-based catalyst, catalyst composition is designed as:

[0033] System 5: Ni 3 Al, 1mol; tin nitrate, 0.1mol;

[0034] System 6: Ni 3 Al, 1mol; tin nitrate, 0.15mol;

[0035] System 7: Ni 3 Al, 1mol; tin nitrate, 0.2mol;

[0036] Its concrete steps are: 1), adopt smelting method to prepare single-phase nickel-aluminum alloy; 3 Al alloy sheet; the thickness of the alloy sheet is 5um; 2), put the nickel-aluminum alloy sheet in step (1) into 30wt% KOH solution for 8h; the reaction temperature is 150°C, the reaction product is centrifuged and washed 3 times with distilled water; 3), Immerse the product obtained in step (2) into the doped tin nitrate solution, and dry it in vacuum at 100°C for 5 hours; 4), sinter the product obtained in step (3) in high-temperature air, the sintering temperature is 1100°C, and the sintering time is 5h; 5 ), reducing the product obtained in step (4) at high temperature in a hydrogen atmosphere, the r...

Embodiment 3

[0039] With embodiment 1 operation, catalyst composition is designed as:

[0040]System 5: NiAl, 1mol; rhodium nitrate, 0.1mol;

[0041] System 6: NiAl, 1mol; Palladium nitrate, 0.15mol;

[0042] System 7: NiAl, 1mol; tin nitrate, 0.2mol;

[0043] Catalyst activity test; weigh 0.2g catalyst and put it into the reactor, methanol flow rate is 25ul / min; reaction temperature is 320~520℃; see Figure 4 with 5 ; The catalyst has good catalytic activity and hydrogen selectivity. The conversion rate of methanol is greater than 50%; the selectivity of hydrogen is greater than 90%.

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Abstract

The invention relates to a preparation method of a nickel-based catalyst. The preparation method of the nickel-based catalyst comprises the following steps: by using metal nickel and aluminum as initial raw materials, preparing Ni3Al, Ni3Al2, NiAl and Ni3Al5 alloys by using a smelting method; performing treatment such as alkali-metal doping, sintering and reduction to obtain the nickel-based catalyst. The main component of the catalyst is Ni / Al2O3 or Ni / NiAl2O4 / Al2O3, doped metal is one out of Sn, Pt, Rh and Pd, the nickel-based catalyst accounts for 80-99.5 percent, and doped substances account for 0.5-20 percent. The catalyst has the advantages of high reaction activity, good stability and the like, and has excellent catalytic activity and H2 selectivity on methanol cracking. The nickel-based catalyst is simple in preparation process and low in cost, has the characteristics of being favorable for industrial production and the like, and has a great application prospect.

Description

technical field [0001] The invention belongs to the technical field of hydrogen preparation, in particular to a method for preparing a nickel-based catalyst. Background technique [0002] With the depletion of petroleum resources and the increasing environmental pollution, the development of clean and cheap fuels to replace petroleum has become a hot research topic in various countries. Hydrogen is an ideal clean fuel, and its combustion product is only H 2 O, no pollution to the environment. Therefore, in recent years, countries are competing to develop large-scale economical hydrogen production and hydrogen storage technologies. Hydrocarbon cracking or steam reforming has the advantages of wide sources of raw materials and low prices, and is an important source of large-scale hydrogen production. The core of this hydrogen production technology lies in the development of efficient and cheap catalysts. [0003] Nickel-aluminum alloy compound is the precursor of high-effic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01J23/835
Inventor 范美强陈达柴文详田光磊
Owner CHINA JILIANG UNIV
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