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Preparation method of nickel based metal load type catalyst

A supported catalyst, base metal technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the cumbersome preparation process, increased energy consumption, metal loading The problem of multiple intermediate calcination steps of the type catalysts, to achieve the effect of simplifying the activation process, reducing energy consumption, high catalytic activity and selectivity

Active Publication Date: 2012-06-27
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of metal-supported catalysts by this method is relatively cumbersome due to the addition of intermediate roasting steps, and the energy consumption is greatly increased.

Method used

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  • Preparation method of nickel based metal load type catalyst

Examples

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Comparison scheme
Effect test

Embodiment 1

[0021]Example 1: 1.5g NiMgAl-LDHs hydrotalcite is loaded into a stainless steel reactor, and reduced by pure hydrogen, the hydrogen flow rate is 30ml / min, the reduction temperature is programmed from room temperature to 500°C, and the heating rate is 5°C / min, keeping 2h. The catalyst after direct reduction activation is recorded as NiMgAl-LDHs-500(R).

Embodiment 2

[0022] Example 2: 1.5g NiMgAl-LDHs hydrotalcite is loaded into a stainless steel reactor, and reduced by pure hydrogen, the hydrogen flow rate is 30ml / min, the reduction temperature is programmed from room temperature to 550°C, and the heating rate is 5°C / min, keeping 2h. The catalyst after direct reduction activation is recorded as NiMgAl-LDHs-550(R).

Embodiment 3

[0023] Example 3: 1.5g NiMgAl-LDHs hydrotalcite is loaded into a stainless steel reactor, and reduced by pure hydrogen, the hydrogen flow rate is 30ml / min, the reduction temperature is programmed from room temperature to 600°C, and the heating rate is 5°C / min, keeping 2h. The catalyst after direct reduction activation is recorded as NiMgAl-LDHs-600(R).

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Abstract

The invention discloses a method for preparing nickel-base metal supported catalyst. The preparation method comprises the steps of reducing a nickel-base layered hydrotalcite precursor for 1 to 12 hours by use of hydrogen in hydrogen atmosphere at a temperature between 200 and 800 DEG C and directly generating the nickel-base metal supported catalyst. The composition of the nickel-base layered hydrotalcite precursor is Ni1-y-xMxAly(OH)2(CO3)y / 2+x(z-2) / 2.nH2O, wherein x is between 0 and 0.5; y is between 0.1 and 0.33; z is a valence of M; and the M is Fe, Co, Cu, Sn, Mg, Zn, La or Ce. As a direct H2 reduction-activation method leaves out the step of intermediate roasting, the method has the advantages of simplifying a catalyst- activating process and reducing energy consumption, and is an optimal option for preparing a metal supported catalyst by reducing and activating a catalyst precursor which contains a transitional metal catalyst prepared by a precipitation method.

Description

(1) Technical field [0001] The present invention relates to a kind of preparation method of nickel-based metal supported catalyst, particularly relate to a kind of hydrotalcite containing Ni in H 2 Construction of metal-supported catalysts by direct reduction activation under atmosphere. (2) Background technology [0002] Hydrotalcite is a kind of layered anionic clay (Layered Double Hydroxides, referred to as LDHs), the general chemical formula is [M 2+ 1-x m 3+ x (OH) 2 ](A n- ) x / n mH 2 O, where M 2+ and M 3+ Represent divalent and trivalent metal ions, such as Mg 2+ , Zn 2+ 、Co 2+ 、Ni 2+ and Al 3+ , Fe 3+ and other metal cations; x is M 3+ / (M 2+ +M 3+ ) Molar ratio, 0.20~0.40; A n- is an intercalation anion, such as CO 3 2- , NO 3 - , heteropolyanions, metal complex ions, etc. Due to the unique layer cation adjustability and interlayer anion exchangeability of this kind of material, it has great application potential in catalysis, adsorption, ion...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/78B01J23/755B01J23/835B01J27/232
Inventor 倪哲明潘国祥王力耕李小年
Owner ZHEJIANG UNIV OF TECH
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