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Multi-core-shell structure nickel-based catalyst applied to carbon dioxide reforming reaction, and preparation method and use of multi-core-shell structure nickel-based catalyst

A nickel-based catalyst and carbon dioxide technology, which is applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as environmental pollution, waste of resources, and low utilization rate , to reduce costs, save resources, and reduce costs

Pending Publication Date: 2020-01-31
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the limitation of bagasse conversion and utilization technology, most of the bagasse is directly burned or discarded, and its utilization rate is very low, which not only causes waste of resources, but also brings environmental pollution

Method used

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  • Multi-core-shell structure nickel-based catalyst applied to carbon dioxide reforming reaction, and preparation method and use of multi-core-shell structure nickel-based catalyst
  • Multi-core-shell structure nickel-based catalyst applied to carbon dioxide reforming reaction, and preparation method and use of multi-core-shell structure nickel-based catalyst
  • Multi-core-shell structure nickel-based catalyst applied to carbon dioxide reforming reaction, and preparation method and use of multi-core-shell structure nickel-based catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Preparation of catalyst:

[0065] (1) Take 13.612 g of nickel sulfate hexahydrate and dissolve it in 100 mL of deionized water to prepare 0.52 mol / L solution A.

[0066] (2) Take 6.162 g of magnesium sulfate heptahydrate, dissolve it in 100 mL of deionized water to prepare a 0.25 mol / L solution, mix it with solution A and make solution B.

[0067] (3) Dehydrate and crush the bagasse to 10-20 mesh, take 150g into a flat-bottomed flask containing 1000mL 0.2mol / L hydrochloric acid solution, reflux for 12 hours at a temperature of 90℃ and a rotation speed of 700RPM, and then deionize The supernatant was washed with water until the pH of the supernatant was 7, and then it was placed in a drying cabinet and dried at 110°C for 15 hours to obtain solid C. The solid C was further treated with hydrothermal carbonization reaction maintained at 180°C for 18 hours, washed with deionized water, and dried at 110°C for 15 hours to obtain 20 g of a porous core-shell carbon material.

[0068] (...

Embodiment 2

[0076] Preparation of catalyst:

[0077] (1) Dissolve 13.612 g of nickel sulfate hexahydrate in 100 mL of deionized water to prepare solution A with a concentration of 0.52 mol / L.

[0078] (2) Take 12.324g of magnesium sulfate heptahydrate and dissolve it in 100 mL of deionized water to prepare a 0.50mol / L solution, mix it with solution A and make solution B.

[0079] (3) After the bagasse is dehydrated and crushed to 10-20 mesh, take 200g into a flat-bottomed flask containing 1000mL 0.2mol / L phosphoric acid solution, reflux for 10 hours at a temperature of 90°C and a rotation speed of 700RPM, and then deionize The supernatant was washed with water to pH=7, and then dried at 110°C for 15 hours to obtain solid B. After the solid B was subjected to hydrothermal treatment maintained at 200°C for 20 hours, it was washed with deionized water, and dried at 110°C for 15 hours to obtain 18.75 g of porous core-shell carbon material.

[0080] (4) Add the porous core-shell structured carbon mat...

Embodiment 3

[0087] Preparation of catalyst:

[0088] (1) Dissolve 13.612 g of nickel nitrate hexahydrate in 100 mL of deionized water, stir until completely dissolved, and prepare solution A with a concentration of 0.52 mol / L.

[0089] (2) Take 19.2 g of magnesium nitrate hexahydrate, dissolve it in 100 mL of deionized water to prepare a 0.75 mol / L solution, mix it with solution A and make solution B.

[0090] (3) Add 15 g of activated carbon to solution B, immerse it at room temperature for 24 hours, and then dry it at 110°C for 15 hours to obtain 30 g of solids.

[0091] (4) Take the solid solid obtained in step (3) and send it into a quartz reaction tube with an outer diameter of 10 mm, and use a program-controlled temperature heating tube furnace. The heating rate is controlled at 20 °C / min, and heated to a temperature of 150 mL / min in a nitrogen gas stream. After keeping the temperature at 900°C for 1.5 hours, wait until the temperature drops to room temperature to obtain 20 g of the require...

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Abstract

The invention discloses a multi-core-shell structure nickel-based catalyst applied to the technical field of preparation of synthesis gas by reforming carbon dioxide, and a preparation method and a use method of the multi-core-shell structure nickel-based catalyst. According to the catalyst, bagasse subjected to hydro-thermal treatment is used as a carrier, nickel is used as an active component, magnesium is used as an auxiliary agent, the required catalyst is obtained after isopyknic impregnation, and the catalyst comprises, by the mass percentage, 15% of Ni, 5-15% of MgO and 70-80% of carbon. The prepared catalyst has high activity and stability, and can be kept active for at least 800 h in a carbon dioxide reforming stability experiment. The carrier of the catalyst uses low-cost bagasseas a raw material, hydrothermal carbon is prepared through a hydrothermal synthesis method, comprehensive utilization of the bagasse can be achieved, nickel and magnesium metals can be recycled through simple calcination of the used catalyst, cyclic utilization of the metals is achieved, and thus the purposes of reducing cost, saving resources and protecting the environment are achieved.

Description

Technical field [0001] The invention belongs to the technical field of preparation of transition metal catalysts, and specifically relates to a core-shell structured nickel-based catalyst for carbon dioxide reforming reaction, and a preparation method and application thereof, and in particular to the application of the catalyst in carbon dioxide reforming to syngas . Background technique [0002] With the realization of industrialization and the increasing use of petroleum and coal, the CO produced by their combustion 2 More and more. Data show that the concentration of carbon dioxide in the global atmosphere has risen from 280 ppm before the industrial revolution to 387 ppm now, and it is still increasing at a rate of 0.5% per year. According to estimated data released by the Intergovernmental Panel on Climate Change, by 2100, the concentration of carbon dioxide in the global atmosphere will reach 541-970 ppm. Excessive levels of carbon dioxide can cause serious environmental ...

Claims

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Application Information

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IPC IPC(8): B01J23/78C01B3/38
CPCB01J23/78C01B3/38C01B2203/0238C01B2203/1058C01B2203/1082C01B2203/1241Y02P20/52
Inventor 韩军梁岩余斐赵波
Owner WUHAN UNIV OF SCI & TECH
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