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Macroporous carbonized nickel catalyst, and preparation method and application thereof

A nickel carbide and catalyst technology, applied in the field of carbide catalyst preparation, can solve the problem that carbide materials are not yet reported, and achieve the effects of short cycle, simple operation method and low cost

Inactive Publication Date: 2014-01-01
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Carbide materials with high specific surface area and pore structure have not been reported so far.

Method used

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  • Macroporous carbonized nickel catalyst, and preparation method and application thereof
  • Macroporous carbonized nickel catalyst, and preparation method and application thereof
  • Macroporous carbonized nickel catalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] Embodiment 1 The preparation method of carboxyl modified colloidal crystal template

[0091] In this example, the carboxyl-modified colloidal crystal template was prepared according to the following method:

[0092] (1) Preparation of monodisperse carboxyl-modified polymethylmethacrylate (c-PMMA) microspheres by improved soap-free emulsion polymerization

[0093] Add 50ml of acetone and 150ml of deionized water to a tank equipped with a stirrer, reflux condenser, thermometer and N 2 In a 1000ml four-necked flask with a trachea, pass N 2 Vacuumize, add MMA and AA with a volume ratio of 25:1 (both monomers are purified by distillation under reduced pressure), and heat to 80°C. At the same time, 0.27g of initiator KPS and 0.45g of AIBN were weighed and dissolved in 150ml of water, heated to 80°C and added to a four-necked flask. N 2 After reacting for 1.5 h under protection, it was naturally cooled to room temperature under stirring, ultrasonically treated for 1.5 h, a...

Embodiment 2

[0098] The preparation method of embodiment 2 macroporous nickel carbide

[0099]Weigh nickel nitrate, dissolve it in 10ml of methanol / ethylene glycol mixed solution (volume ratio 1:3), the molar ratio of nickel nitrate and methanol / ethylene glycol is 1:2, stir magnetically for 2 hours to obtain a homogeneous transparent solution, and obtain the catalyst precursor solution. This solution was used to impregnate 3 g of the dried c-PMMA colloidal crystal template prepared in Example 1 for 10 h. After the impregnation was complete, the excess precursor solution was removed by suction filtration, and then the template was placed in a vacuum oven to dry overnight. Finally, it is heated up to 750°C for calcination in an argon atmosphere, and kept at a constant temperature for 4 hours to obtain macroporous nickel carbide. The argon flow rate is 80ml / min, and the heating rate is 1°C / min.

[0100] The X-ray diffraction spectrum and the infrared spectrum of the macroporous nickel carbi...

Embodiment 3

[0101] Example 3 The result of macroporous nickel carbide being used to catalyze and simulate hydrogen production by steam reforming of bio-oil

[0102] According to the following steps, the macroporous nickel carbide catalyst prepared in Example 2 is used to catalyze hydrogen production by steam reforming of bio-oil:

[0103] Put the macroporous nickel carbide catalyst into the fixed-bed reactor and feed 50% H 2 / N 2 Mixed gas, activate the catalyst for 2 hours at 450°C;

[0104] According to C 2 h 5 OH:C 6 h 5 OH:H 2 O=2:1:12 ratio, configure a mixed solution of simulated bio-oil;

[0105] The bio-oil mixed solution is preheated to 150°C, the reactor is heated to 450°C, the activation gas is stopped, and then the simulated bio-oil mixed solution is pumped into the reactor with a plunger pump to carry out the catalytic hydrogen production reaction.

[0106] Depend on Figure 4 The results show that the H in the prepared syngas 2 The content is as high as 65%. It can...

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Abstract

The invention provides a macroporous carbonized nickel catalyst, and a preparation method and application of the macroporous carbonized nickel catalyst. The macroporous carbonized nickel catalyst is prepared by using a carboxylic acid-modified polymethyl methacrylate microsphere as a template and nickel nitrate as a precursor; the pore diameter of macroporous carbonized nickel is within the range of 50-1000 nm. The preparation method of the macroporous carbonized nickel comprises the following steps: adding the nickel nitrate into a methanol / ethylene glycol mixed solution, wherein the molar ratio of the methanol to the ethylene glycol is 1: (1-3) preferably; stirring to obtain a nickel nitrate solution; adding the carboxylic acid-modified polymethyl methacrylate microsphere into the obtained nickel nitrate solution for dipping; filtering; drying; heating up to 400-750 DEG C; performing heat preservation for 4-8 hours to obtain the macroporous carbonized nickel; preferably, the volume ratio of the methanol to the ethylene glycol is 1: (2-4). According to the invention, the carboxylic acid-modified microsphere is used as the template, the nickel nitrate is used as the precursor, and direct roasting is carried out under the condition of the methanol / ethylene glycol mixed solution to prepare the three-dimensionally communicated carbonized nickel; the operation method is simple, the period is short and the cost is low.

Description

technical field [0001] The present invention relates to the field of preparation of carbide catalysts, in particular, to a macroporous nickel carbide catalyst and its preparation method and application, more specifically, to a three-dimensional penetrating macroporous nickel carbide catalyst with strong acid and alkali resistance mechanical properties And its preparation method and application. Background technique [0002] Carbide is an "interstitial alloy" formed by carbon and metal, that is, smaller carbon atoms occupy the gaps in the densely packed layer of metal atoms, and often have a simple crystal structure. [0003] Carbide is a kind of substance with high melting point and hardness, extremely high thermal stability and mechanical stability, and almost resistant to various chemical corrosion at room temperature. In addition, it also has similar electrical and magnetic properties to its parent metal, and it is these properties that make them widely used in mechanica...

Claims

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Application Information

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IPC IPC(8): B01J27/22C01B3/40
CPCY02P20/52
Inventor 刘坚赵震谭小玉徐春明韦岳长段爱军姜桂元
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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