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Preparation method of hydrogenation catalyst for treating dioxins in garbage gasification tail gas

A hydrogenation catalyst, a technology for gasification tail gas, which is applied in physical/chemical process catalysts, chemical instruments and methods, separation methods, etc., can solve problems such as inapplicability, achieve high-efficiency dioxin generation, good adaptability, reduce Effects of Dioxin Components

Active Publication Date: 2020-05-22
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, catalysts that can be used in the oxidizing atmosphere of incineration flue gas with metal oxides as the active component are not suitable for waste gasification tail gas

Method used

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  • Preparation method of hydrogenation catalyst for treating dioxins in garbage gasification tail gas

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Experimental program
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Effect test

Embodiment 1

[0032] a) Take 30g of lignite in a 500mL porcelain crucible, add 3mL of water and stir evenly, cover the crucible and place it in a muffle furnace for coking. The heating program of the muffle furnace is as follows: firstly, the temperature is raised to 300°C in 30 minutes, then raised to 1150°C at a rate of 3°C / min, and finally stays at 1150°C for 30 minutes. Finally, the muffle furnace cooling program is set, and the coke is taken out for later use when the temperature drops to room temperature.

[0033] b) Weigh 5 g of the lignite coke prepared in step a) and disperse it in 80 mL of ethylene glycol solvent, ultrasonically make it into a uniform dispersion, and weigh 5 mmol NiSO 4 ·6H 2 O, 5mmol FeSO 4 ·7H 2 O, 10 mmol Na 2 S 2 o 3 ·5H 2 O (sulfur source) was slowly added to lignite coke ethylene glycol turbid liquid, stirred and dissolved by a magnetic stirrer for 10 minutes, the mixture was transferred to a polytetrafluoroethylene-lined autoclave, sealed and placed ...

Embodiment 2

[0036] a) Take 30g of lignite in a 500mL porcelain crucible, add 3mL of water and stir evenly, cover the crucible and place it in a muffle furnace for coking. The heating program of the muffle furnace is as follows: firstly, the temperature is raised to 300°C in 30 minutes, then raised to 1150°C at a rate of 3°C / min, and finally stays at 1150°C for 30 minutes. Finally, the muffle furnace cooling program is set, and the coke is taken out for later use when the temperature drops to room temperature.

[0037] b) Weigh 5 g of the lignite coke prepared in step a) and disperse it in 80 mL of ethylene glycol solvent, ultrasonically make it into a uniform dispersion, and weigh 5 mmol NiSO 4 ·6H 2 O, 5mmol FeSO 4 ·7H 2 O, 10mmol thiourea (sulfur source) was slowly added to lignite coke ethylene glycol turbid liquid, stirred and dissolved by a magnetic stirrer for 10min, the mixture was transferred to a polytetrafluoroethylene-lined autoclave, sealed and placed in an oven at 180°C A...

Embodiment 3

[0039] a) Take 30g of lignite in a 500mL porcelain crucible, add 3mL of water and stir evenly, cover the crucible and place it in a muffle furnace for coking. The heating program of the muffle furnace is as follows: firstly, the temperature is raised to 300°C in 30 minutes, then raised to 1150°C at a rate of 3°C / min, and finally stays at 1150°C for 30 minutes. Finally, the muffle furnace cooling program is set, and the coke is taken out for later use when the temperature drops to room temperature.

[0040] b) Weigh 5 g of the lignite coke prepared in step a) and disperse it in 80 mL of ethylene glycol solvent, ultrasonically make it into a uniform dispersion, and weigh 5 mmol NiSO 4 ·6H 2 O, 5mmol FeSO 4 ·7H 2 O, 10mmol CS 2 (Sulphur source) was slowly added to lignite coke ethylene glycol turbid liquid, stirred and dissolved by a magnetic stirrer for 10min, the mixture was transferred to a polytetrafluoroethylene-lined autoclave, sealed and placed in an oven for 20h at 18...

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Abstract

The invention discloses a preparation method of a hydrogenation catalyst for treating dioxins in garbage gasification tail gas, and relates to the technical field of catalyst preparation. Lignite cokeis used as a carrier of a dioxin hydrogenation catalyst; and the method includes subjecting the lignite coke to pretreatment ultrasonic treatment to obtain dispersoid; then adding active components and a sulfur source respectively into the dispersion, with the active components being NiSO<4>.6H2O and FeSO<4>.7H2O, and the sulfur source being a mixture of Na2S2O<3>.5H2O and thiourea; stirring anddissolving the mixture after addition is completed transferring the obtained mixture into a high-pressure reaction kettle; taking out a product, and carrying out vacuum drying at 80 DEG C to constantweight, so as to obtain the hydrogenation catalyst NiS / FeS2@GC. The active components of the catalyst can provide rich hydrogen for the atmosphere of the garbage gasification tail gas, so that formation of C-Cl bonds in dioxins is inhibited, and dioxin components in the gasification tail gas are effectively reduced.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a preparation method of a hydrogenation catalyst used for treating dioxin in waste gasification tail gas. Background technique [0002] At present, all countries in the world are facing the problem of difficult garbage disposal, and the harmless disposal of garbage, mainly sanitary landfill, wastes land resources. Thermochemical conversion technologies based on incineration and gasification have the advantages of small footprint, high degree of reduction, and energy recovery. However, there are a large amount of chlorine-containing organic waste such as plastics in domestic waste, and a large amount of dioxin pollutants will be produced during the heat treatment process. [0003] Dioxins are a class of aromatic organic compounds with high toxicity. The common feature of dioxin molecules is that they contain C-Cl bonds, including polychlorinated dibenzodioxins and po...

Claims

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Application Information

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IPC IPC(8): B01J27/043B01D53/72B01D53/86
CPCB01J27/043B01D53/8668
Inventor 张华伟赵淑龙梁鹏孙英杰陈栋田原宇
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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