Composite catalyst as well as preparation method and application thereof

A composite catalyst, polyferric aluminum chloride technology, used in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of less catalyst and long catalytic degradation time (generally more than 6 hours, biochemical Risks and other issues, to achieve the effect of high degradation efficiency, good catalytic degradation activity, and short degradation time

Active Publication Date: 2021-10-01
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the use of biological methods to treat food waste has high efficiency and strong universal applicability, it also has certain defects. Leftover meat may pose a biochemical risk (e.g. "mad cow disease")
Non-biological treatment technologies, such as chemical methods, have a simple treatment process, high efficiency, and low cost, but currently there are few relevant catalysts, and the catalytic degradation time is long (generally greater than 6 hours)

Method used

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  • Composite catalyst as well as preparation method and application thereof
  • Composite catalyst as well as preparation method and application thereof
  • Composite catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] This embodiment provides a composite catalyst, including biochar, polyferric aluminum chloride and green rust. The preparation method of this composite catalyst comprises the following steps:

[0048] (1) Preparation of green rust

[0049] Prepare 0.05mol / LFe respectively 2 (SO 4 ) 3 solution, 0.2mol / L FeSO 4 ·7H 2 O solution and 1mol / L NaOH solution. FeSO was first added to the three-neck flask 4 ·H 2 O, Fe was added to the constant pressure burette respectively 2 (SO 4 ) 3 solution and NaOH solution. Under a nitrogen environment and magnetic stirring, open two constant pressure titration funnels, control the pH value to 7, stir the reaction at room temperature, heat up to 40°C, and age for 24 hours. After aging, centrifuge and dry to obtain the green rust product.

[0050] (2) Preparation of composite catalyst

[0051]Mix 25g of the green rust prepared in step (1), 40g of polyferric aluminum chloride and 100g of biochar, and stir magnetically at 90°C for...

Embodiment 2

[0062] This embodiment provides a composite catalyst, including biochar, polyferric aluminum chloride and green rust. The preparation method of this composite catalyst comprises the following steps:

[0063] (1) Preparation of green rust

[0064] Prepare 0.05mol / L Fe 2 (SO 4 ) 3 solution, 0.25mol / L FeSO 4 ·7H 2 O solution and 1mol / L NaOH solution. FeSO was first added to the three-neck flask 4 ·7H 2 O, Fe was added to the constant pressure burette respectively 2 (SO 4 ) 3 solution and NaOH solution. Under a nitrogen environment and magnetic stirring, two constant pressure titration funnels were opened, the pH value was controlled to be 7, the reaction was stirred at room temperature, and the mixture was heated and aged for 24 hours. After aging, centrifuge and dry to obtain green rust.

[0065] (2) Preparation of composite catalyst

[0066] Mix 20 g of the green rust prepared in step (1), 45 g of polyferric aluminum chloride and 100 g of biochar, and stir magneti...

Embodiment 3

[0070] This embodiment provides a composite catalyst, including biochar, polyferric aluminum chloride and green rust. The preparation method of this composite catalyst comprises the following steps:

[0071] (1) Preparation of green rust

[0072] Prepare 0.05mol / L Fe 2 (SO 4 ) 3 solution, 0.25mol / L FeSO 4 ·7H 2 O solution and 1mol / L NaOH solution. FeSO was first added to the three-neck flask 4 ·7H 2 O, Fe was added to the constant pressure burette respectively 2 (SO 4 ) 3 solution and NaOH solution. Under a nitrogen environment and magnetic stirring, two constant pressure titration funnels were opened, the pH value was controlled to be 7, the reaction was stirred at room temperature, and the mixture was heated and aged for 24 hours. After aging, centrifuge and dry to obtain green rust.

[0073] (2) Preparation of composite catalyst

[0074] Mix 15g of the green rust prepared in step (1), 45g of polyferric aluminum chloride and 100g of biochar, and stir magnetical...

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Abstract

The invention belongs to the technical field of garbage treatment, and discloses a composite catalyst as well as a preparation method and application thereof. The composite catalyst comprises polyferric aluminum chloride and green rust, the molecular formula of the green rust is [Fe<2+><1-x>Fe<3+><x>(OH)<2>]<x+>[(x/2)(SO<4><2->)]<x->, and x is equal to 0.4-0.5. The composite catalyst provided by the invention comprises the polyferric aluminum chloride and the green rust which have a synergistic effect, so that the composite catalyst has good catalytic degradation activity on carbohydrates, fat, proteins and the like in the kitchen wastes, can effectively treat the kitchen wastes in various complex forms, and is high in degradation efficiency and short in degradation time; and no secondary pollution is generated before and after treatment, and the treatment process is simple and easy to operate. The preparation method of the composite catalyst is simple, raw materials are easy to obtain, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of garbage treatment, and in particular relates to a composite catalyst and its preparation method and application. Background technique [0002] Food waste refers to food residues and food processing waste, non-edible animal and vegetable oils and various oil-water mixtures. The chemical composition of food waste is complex, mainly including water, inorganic salts, organic acids, and various macromolecular organic compounds such as protein, starch, cellulose, heteropolysaccharides, and fat. If the food waste is not handled properly, it may lead to the spread of diseases, and even produce dioxin and other substances to pollute the environment. Therefore, the use of scientific and reasonable methods to deal with kitchen waste can not only prevent environmental pollution and eliminate the threat to the health of residents, but also enable the recycling of valuable organic resources and transform them into usa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/128B01J27/053B01J37/03B01J35/10A62D3/38A62D3/40B09B3/00A62D101/20
CPCB01J27/128B01J27/053B01J37/031B01J35/1004A62D3/38A62D3/40A62D2101/20A62D2203/02Y02W30/78
Inventor 张延霖张溢洳文俪洁卢春媛
Owner SOUTH CHINA NORMAL UNIVERSITY
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