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Calcium-based catalyst for regulating and controlling gas components generated in thermal decomposition and preparation method of calcium-based catalyst

A catalyst, calcium-based technology, used in special forms of dry distillation, petroleum industry, coke ovens, etc., can solve the problem of insufficient combustible gas yield, and achieve the effect of reducing content, promoting reduction reaction, and increasing carbon monoxide.

Inactive Publication Date: 2013-10-23
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aiming at the problem that the yield of combustible gas is not high enough when domestic garbage and other wastes and tailings are subjected to catalytic pyrolysis, the present invention introduces a calcium-based catalyst and its preparation method

Method used

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  • Calcium-based catalyst for regulating and controlling gas components generated in thermal decomposition and preparation method of calcium-based catalyst
  • Calcium-based catalyst for regulating and controlling gas components generated in thermal decomposition and preparation method of calcium-based catalyst
  • Calcium-based catalyst for regulating and controlling gas components generated in thermal decomposition and preparation method of calcium-based catalyst

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Embodiment 1

[0020] The ore was collected from limestone tailings 1# in Mentougou, Beijing. The composition content and properties are shown in Table 1. The tailings ore was crushed and screened to a particle size below 0.125mm. A fixed-bed reactor was used for calcination at a temperature of 900° C. without air for 60 minutes. After calcination, quickly take out the material and place it in a desiccator to room temperature, shape it into a powder and seal it for storage as a catalyst. Add the prepared powder into domestic waste for catalytic pyrolysis of waste. The composition of the waste raw materials used is shown in Table 2.

[0021] Table 1 Properties of limestone tailings

[0022]

[0023] Composition (%) of table 2 house refuse

[0024]

[0025] The catalyst is directly mixed with the garbage, and the addition amount is 15%. A fixed bed pyrolysis reactor is used for the pyrolysis of domestic waste, the temperature is programmed, the temperature rise rate is 15°C / min, and t...

Embodiment 2

[0032] Limestone tailings 2# collected from Mentougou, Beijing, its composition and properties are shown in Table 5. The raw ore is crushed and screened to below 0.18mm. Calcined at 900°C under air-isolated conditions, and the calcination time was 2h. After calcination, quickly take out the material and place it in a desiccator to dry to room temperature, and use it as a catalyst after granulation. The raw material used is the sludge from Gaobeidian Sewage Treatment Plant, and its properties are shown in Table 6.

[0033] Table 5 Properties of limestone tailings

[0034]

[0035] Table 6 Basic physical and chemical properties of Gaobeidian sludge

[0036]

[0037] The catalyst is directly mixed with the sludge, and the addition amount is 10%. The catalytic pyrolysis of sludge was carried out in an external fixed-bed reactor, the temperature was programmed to rise at a rate of 15°C / min, and the final temperature was 950°C. Gas chromatography was used to detect the com...

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Abstract

The invention discloses a calcium-based catalyst for regulating and controlling gas components generated in the thermal decomposition of wastes and coal mainly comprising household garbage, forestry and agricultural residues, civil sludge, slush, waste rubber, waste plastics, coal tailings and the like and a preparation method of the calcium-based catalyst. By utilizing the calcium-based catalyst, the combustible gas generation rate of the materials in the thermal decomposition process is increased; and partial carbon dioxide is converted into carbon monoxide, so that the gas components are regulated and controlled. The preparation method comprises the following steps of: crushing, screening, calcining and processing carbonate minerals (comprising tailings) taken as raw materials, thereby preparing the catalyst in different shapes and with different particle sizes. The calcium-based catalyst is mainly used for promoting a thermal cracking reaction and secondary decomposition to be carried out on the wastes and the coal as well as a reaction to be carried out on the carbon dioxide and coke, so that the content of combustible gases such as hydrogen and the carbon monoxide generated in the thermal decomposition is increased. As the calcium-based catalyst is used, the carbon dioxide in the gases generated in the thermal decomposition is reduced to a certain extent, so that the effect of carbon emission reduction is achieved.

Description

1. Technical field [0001] The invention relates to the high-efficiency utilization of waste and coal, which is used to increase the yield of combustible gas in the waste and coal pyrolysis gas, to regulate the composition of the gas, and to partially realize the conversion and emission reduction of carbon dioxide in the gas. 2. Background technology [0002] Energy is the material basis of modern civilization and an important driving force for economic and social development. At present, on a global scale, due to the dual pressure of economic development and population growth, many countries in the world are facing the shortage of energy supply, especially the tight supply of oil and gas. Finding new energy sources and alternative energy sources, and using energy efficiently in an environment-friendly manner are undoubtedly important means for human beings to solve energy shortages and maintain the coordinated development of population, environment, and resources. [0003] ...

Claims

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Application Information

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IPC IPC(8): B01J23/78F23G5/027C10B53/00
Inventor 舒新前贾懿曼张顺利徐精求
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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