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Preparation method of gangue composite catalyst, and application of catalyst in catalytic pyrolysis

A technology for catalytic pyrolysis and coal gangue, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, petroleum industry and other directions, which can solve the problems of limited application and high cost of use

Inactive Publication Date: 2017-01-11
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used catalysts, such as nickel-based, calcium-based and iron-based catalysts, despite their good performance, are expensive to use, which limits their application in catalytic pyrolysis of waste

Method used

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  • Preparation method of gangue composite catalyst, and application of catalyst in catalytic pyrolysis
  • Preparation method of gangue composite catalyst, and application of catalyst in catalytic pyrolysis
  • Preparation method of gangue composite catalyst, and application of catalyst in catalytic pyrolysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Weigh 55.2g of coal gangue, calcine and activate it in a muffle furnace or a fixed-bed reactor, the calcination temperature is 490°C, the calcination time is 5h, and the coal gangue with a particle size of 2-10mm is screened out as activated coal Gangue matrix;

[0028] (2) Take an appropriate amount of acetate by weighing 8% of the ratio of the active component in the catalyst, wherein nickel acetate 6.8g, manganese acetate 7.1g, magnesium acetate 14.3g, the required metal acetate is dissolved in an appropriate amount of In deionized water, make a metal salt solution as an impregnating solution;

[0029] (3) Soak the activated coal gangue matrix in metal salt solution, immerse at 55°C for 24h, filter and dry at 105°C for 15h in a vacuum drying oven;

[0030] (4) Put the dry sample into the furnace and bake it at 450° C. for 4 hours to prepare the coal gangue composite catalyst.

[0031] The prepared coal gangue composite catalyst was added to domestic garbage, co...

Embodiment 2

[0039] (1) Weigh 55.2g of coal gangue, calcining and activating the coal gangue in a muffle furnace or a fixed bed reactor, the activation temperature is 540°C, the activation time is 5h, and the coal gangue with a particle size of 2-10mm is screened out, As an activated coal gangue matrix;

[0040] (2) Take an appropriate amount of acetate by weighing 8% of the ratio of the active component in the catalyst, wherein nickel acetate 6.8g, manganese acetate 7.1g, magnesium acetate 14.3g, the required metal acetate is dissolved in a certain amount of deionized water, prepared as an impregnating solution;

[0041] (3) Immerse the activated coal gangue matrix in the metal acetate solution, soak for 24 hours at a temperature of 65° C., put it into a vacuum drying oven after filtering, and dry it for 16 hours at a temperature of 105° C.;

[0042] (4) Further calcining at a temperature of 500° C. for 6 hours to prepare a coal gangue composite catalyst.

Embodiment 3

[0044] (1) Weigh 55.2g of coal gangue, carry out calcination and activation treatment in a muffle furnace or fixed bed reactor, the activation temperature is 580°C, the activation time is 6h, and the coal gangue with a particle size of 2 to 10mm is screened out as the activated gangue matrix;

[0045] (2) Take an appropriate amount of acetate by weighing 8% of the ratio of the active component in the catalyst, wherein nickel acetate 6.8g, manganese acetate 7.1g, magnesium acetate 14.3g, the required metal acetate is dissolved in a certain amount of deionized water, prepared as an impregnating solution;

[0046] (3) Soak the activated coal gangue matrix in the acetate solution, soak it for 24 hours at a temperature of 60°C, and dry it in a vacuum oven at 105°C for 18 hours after filtering;

[0047] (4) Further calcining at a temperature of 700°C for 6 hours can be made into a coal gangue composite catalyst.

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Abstract

The invention provides a preparation method of a gangue composite catalyst, and an application of the catalyst in catalytic pyrolysis. The gangue compound catalyst comprises an active component and a gangue base, wherein the active component accounts for 2-15% of the total weight of the catalyst, and is one or more of magnesium, calcium, manganese, iron and nickel oxides. The preparation method comprises the following steps: carrying out calcining activation treatment on gangue through an impregnation technology to obtain calcined gangue used as the base, preparing a solution from salt containing magnesium, calcium, manganese, iron and nickel in proportion, and carrying out impregnating, drying and roasting post-treatment to prepare the gangue compound catalyst. The catalyst reduces the pyrolysis temperature to a certain degree and improves the yield of combustible gas when used in a solid waste pyrolysis process. The gangue compound catalyst has the advantages of easily available raw materials, simple preparation method, high catalytic pyrolysis activity and wide application prospect.

Description

technical field [0001] The invention relates to preparation and application of a coal gangue composite catalyst. The catalyst can be used for catalytic pyrolysis of organic solid wastes to prepare pyrolysis coke, pyrolysis liquid and pyrolysis gas. Background technique [0002] Solid waste can be divided into municipal solid waste, industrial solid waste, agricultural and forestry waste, etc. according to the source, and the generation of solid waste is huge. At present, my country's urban and rural domestic waste is cleared and transported more than 200 million tons per year, of which more than 50% are organic matter; the annual output of agricultural and forestry waste is more than 700 million tons, all of which are organic matter; various waste residues are about 80 million tons , Tail coal production is about 40-60 million tons. It can be seen that the amount of organic waste resources is huge and has broad prospects for energy utilization. At present, most of them are ...

Claims

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Application Information

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IPC IPC(8): B01J23/78B01J23/755B01J23/889B01J23/745C10B53/02
CPCY02E50/10
Inventor 舒新前徐精求贾晋炜
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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