CoNiP/SiO2 catalyst and preparation method and application of CoNiP/SiO2 catalyst

A catalyst and catalytic hydrogenation technology, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, and preparation of liquid hydrocarbon mixtures. It can solve problems such as corrosion reactors, catalyst coking, and catalyst deactivation, and achieve high content, High conversion rate and high dispersion effect

Active Publication Date: 2018-07-06
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the hydrodeoxygenation (HDO) reaction, precious metal catalysts such as (Pd and Pt) and sulfurized catalysts are widely used at present. The cost of using noble metals is high, and a large amount of reaction heat will be released during hydrodeoxygenation of sulfurized catalysts. The coking of the catalyst leads to the complete deactivation of the catalyst; the free fatty acid in the waste oil raw material will gradually reduce the activity of the catalyst and the yield of diesel components, and it may also corrode the reactor when the content is too high

Method used

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  • CoNiP/SiO2 catalyst and preparation method and application of CoNiP/SiO2 catalyst
  • CoNiP/SiO2 catalyst and preparation method and application of CoNiP/SiO2 catalyst
  • CoNiP/SiO2 catalyst and preparation method and application of CoNiP/SiO2 catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1) Cobalt Nickel Hydroxide / SiO 2 preparation of

[0042] Add cobalt acetate and nickel acetate (the molar ratio of cobalt to nickel is 3:1) into water to dissolve completely, stir with a magnetic stirrer at 600r / min for 20min, add SiO 2 , magnetic stirrer 600r / min rotating speed stirs 20min, drips sodium hydroxide solution 100ml afterwards, the consumption of sodium hydroxide is three times of the molar weight sum of cobalt ion and nickel ion, magnetic stirrer 600r / min rotating speed stirs 25min, Co-precipitated cobalt-nickel hydroxide / SiO 2 of. Cobalt Nickel Hydroxide / SiO 2 Wash with water 3 to 4 times to make the filtrate neutral, wash with ethanol three times, and dry in an oven at 35°C for 8 hours to obtain cobalt-nickel hydroxide / SiO 2 solid.

[0043] 2) CoNiP / SiO 2 preparation of

[0044] The obtained cobalt nickel hydroxide / SiO 2 The solid is calcined in a nitrogen atmosphere in a tube furnace together with sodium hypophosphite. The mass of sodium hypopho...

Embodiment 2~7

[0047] The molar ratio of cobalt to nickel in CoNiP and the loading amount of CoNiP are changed (see Table 1). The preparation methods and other parameters of Examples 2-7 are the same as those of Example 1.

[0048] Table 1

[0049]

Embodiment 8

[0051] The difference of this example is that in the preparation of CoNiP / SiO 2 In the process of calcining cobalt-nickel hydroxide / SiO 2 The conditions for the solid are as follows: the heating rate of the calcination is 5° C. per minute, the temperature is raised to 320° C., and the calcination is performed for 1 hour. Other parameters are the same as in Example 1.

[0052] characterize

[0053] The catalysts prepared in the above examples were characterized by the following means.

[0054] 1) HRTEM high resolution electron microscope, such as figure 1 shown. 2) Specific surface area and pore size distribution: use N 2 Adsorption and desorption methods, such as figure 2 shown. 3) X-ray photoelectron spectroscopy (XPS), such as image 3 shown.

[0055] From figure 1 It can be seen from the figure that when the molar ratio of cobalt to nickel in CoNiP is 3:5, the active ingredient CoNiP is evenly distributed without agglomeration and evenly dispersed. And the CoNiP...

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PUM

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Abstract

The invention provides a CoNiP / SiO2 catalyst and a preparation method and application of the CoNiP / SiO2 catalyst. The CoNiP / SiO2 catalyst comprises a carrier SiO2 and CoNiP loaded on the SiO2, and theloading capacity of the CoNiP on the SiO2 is 5-20 wt%. The preparation method of the CoNiP / SiO2 catalyst comprises the following steps: S1, preparing cobalt nickel hydroxide / SiO2 through a coprecipitation method; S2, calcining the cobalt nickel hydroxide / SiO2 and sodium hypophosphite for 1-2 hours under the atmosphere of an inert gas, and obtaining the CoNiP / SiO2. The CoNiP prepared through the preparation method is smaller in particle size and high in dispersity, is evenly dispersed, and overcomes the defects of easy agglomeration and limited catalytic performance of a high-loading capacitynickel-based catalyst. The CoNiP / SiO2 catalyst is high in hydrodeoxygenation rate and can excellently catalyze biolipid and derivatives like long-chain fatty acid to prepare a biofuel, and the obtained biofuel is high in content of straight-chain paraffin and high in calorific value, and has an excellent industrial prospect.

Description

technical field [0001] The present invention relates to the technical field of catalysts, more specifically, to a CoNiP / SiO 2 Catalyst and its preparation method and application. Background technique [0002] Second-generation biodiesel can be defined as the use of animal and vegetable oils as raw materials, through hydrodeoxygenation and hydroisomerization of related raw materials to obtain alkane components that are very similar to conventional diesel. The preparation of the second generation biodiesel can directly use the production process of petrochemical diesel. Compared with conventional diesel, the raw material source is more abundant, the sulfur content is lower, and the environmental pollution after combustion is small. Renewability, low emissions of particulate matter and greenhouse gases make second-generation biodiesel a promising alternative to conventional diesel fuel. Oil has lower density and kinematic viscosity, higher cetane number. Vegetable oils such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185C10G3/00
CPCB01J27/1853C10G3/45C10G2300/70Y02P30/20
Inventor 谢君李鑫张止戈
Owner SOUTH CHINA AGRI UNIV
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