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Method for preparing carbon/zeolite compound by utilizing fine coal gasification slag and application of carbon/zeolite compound

A coal gasification and compound technology, which is applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve the problems of complex technical route, unfavorable industrial synthesis, high cost, etc., and achieves simple and unique methods, good effects, The effect of low cost of raw materials

Pending Publication Date: 2022-04-29
NINGXIA UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although there have been research reports on coal gasification fine slag, it is mainly aimed at the preparation of high-value carbon materials and zeolite materials after enhanced separation of carbon components and silicon-aluminum inorganic components in coal gasification fine slag, and a small number of studies have reported compatible carbon and Composite materials of silicon-aluminum inorganic components, however, involve high cost, complicated technical routes and high pollution in large-scale preparation, which is not conducive to industrial synthesis

Method used

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  • Method for preparing carbon/zeolite compound by utilizing fine coal gasification slag and application of carbon/zeolite compound
  • Method for preparing carbon/zeolite compound by utilizing fine coal gasification slag and application of carbon/zeolite compound
  • Method for preparing carbon/zeolite compound by utilizing fine coal gasification slag and application of carbon/zeolite compound

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Experimental program
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Effect test

Embodiment 1

[0024] Take Ningdong coal gasification fine slag and mix 2.5mol / L sodium hydroxide solution at 1kg:15L, and stir and react at 95°C for 6h. After the reaction was completed, filter directly while it was hot, wash the obtained solid with deionized water until neutral, and dry the solid product at 80° C. for 12 hours to obtain the carbon / zeolite composite.

[0025] Add 1kg of carbon / zeolite composite to 250L of 1000mg / L crystal violet aqueous solution, and statically adsorb for 3 hours at 30°C. The removal rate of crystal violet in water is as high as 99% as detected by ultraviolet absorptiometry.

[0026] The experimental results are as follows:

[0027] Such as figure 1 As shown, the phase of the carbon / zeolite composite has a typical NaP type zeolite, and the carbon is mainly amorphous.

[0028] Table 1 shows the content of chemical components of coal gasification fine slag-based carbon / zeolite composites.

[0029] Table 1 The content of the chemical composition of the coal...

Embodiment 2

[0035] Take Ningdong coal gasification fine slag and mix 2.2mol / L sodium hydroxide solution at 1kg:14L, and stir and react at 100°C for 6h. After the reaction was completed, filter directly while it was hot, wash the obtained solid with deionized water until neutral, and dry the solid product at 90°C for 11 hours to obtain the carbon / zeolite composite.

[0036] Add 1kg of carbon / zeolite composite to 125L of 1500mg / L crystal violet aqueous solution, and statically adsorb for 2 hours at 30°C. The removal rate of crystal violet in water is as high as 99% as detected by ultraviolet absorptiometry.

Embodiment 3

[0038] Take Ningdong coal gasification fine slag and mix 2.8mol / L sodium hydroxide solution at 1kg:16L, and stir and react at 90°C for 8h. After the reaction was completed, filter directly while it was hot, wash the obtained solid with deionized water until neutral, and dry the solid product at 60° C. for 24 hours to obtain the carbon / zeolite composite.

[0039] Add 0.5kg of carbon / zeolite composite to 125L of 1500mg / L crystal violet aqueous solution, and statically adsorb at 30°C for 2.5h. The removal rate of crystal violet in water is as high as 99% as detected by ultraviolet absorptiometry.

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Abstract

The invention relates to the field of solid waste treatment and resource utilization, in particular to a method for preparing a carbon / zeolite compound from fine coal gasification slag and application thereof.The method comprises the steps that the fine coal gasification slag serves as a raw material, direct heating is conducted for 5-10 hours by adopting an alkali dissolution method, and specifically, the fine coal gasification slag and a sodium hydroxide aqueous solution are mixed according to the proportion; stirring at a certain temperature, filtering, washing and drying to obtain a carbon / zeolite compound; the preparation method disclosed by the invention is simple and unique, energy consumption can be reduced, pollution can be alleviated, and the prepared carbon / zeolite compound has the advantages of remarkable removal effect on crystal violet in dye wastewater and the like.

Description

technical field [0001] The invention relates to the field of solid waste treatment and resource utilization, in particular to a method for preparing carbon / zeolite composites from coal gasification fine slag and its application. Background technique [0002] With the vigorous development of coal gasification technology in my country, bulk coal gasification fine slag is mainly directly landfilled, which easily leads to waste of resources, and its high carbon characteristics make it difficult to apply in large quantities in the field of traditional building materials. The application barriers and technologies of coal gasification fine slag The research has attracted the attention of many enterprises, governments and researchers. [0003] The application of coal-based solid waste to synthesize high-value porous materials and use them in wastewater treatment can not only save costs, realize "zero" discharge of solid waste, but also realize "treatment of waste with waste". In par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/30C02F101/36C02F101/38
CPCB01J20/20B01J20/18C02F1/283C02F2101/36C02F2101/38C02F2101/308B01J2220/4887
Inventor 马玉龙吴玉花孙永刚吉文欣
Owner NINGXIA UNIVERSITY
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