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A preparation method of iron-cerium-based porous catalyst for removing organic sulfur

A technology of organic sulfur and catalyst, which is applied in the preparation of cerium porous materials, iron-cerium-based porous catalysts, and the iron-containing field, can solve the problems that the process method has not been reported, and achieve short preparation time, high sulfur resistance, and easy operation. simple effect

Active Publication Date: 2019-07-16
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no report on the process of removing organic sulfur with iron-cerium-based porous catalysts

Method used

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  • A preparation method of iron-cerium-based porous catalyst for removing organic sulfur
  • A preparation method of iron-cerium-based porous catalyst for removing organic sulfur
  • A preparation method of iron-cerium-based porous catalyst for removing organic sulfur

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Mix iron nitrate and cerium nitrate in a mass ratio of 1:10 to obtain mixed nitrate; mix MIL-100(Fe) and mixed nitrate in a mass ratio of 1:3, add deionized water and stir for 3 hours, to obtain the mixed solution; the above mixed solution was placed in a blast drying oven and dried at 130°C for 8 hours; the dried mixture was placed in a quartz boat and placed in a tube furnace, in an oxygen-enriched atmosphere and 700 The iron-cerium-based porous catalyst was prepared by calcining at ℃ for 2 hours.

[0028] The activity test of the catalyst was carried out in a fixed-bed quartz reactor, and the reaction conditions were: COS concentration 500ppm, CS 2 Concentration 50ppm, space velocity 50000h -1 , reaction temperature 60℃, oxygen content 5%, COS and CS 2 Catalytic conversion results see figure 1 , it can be drawn from the figure that the conversion rate of 100% COS can be maintained for 420 minutes, and the conversion rate of 100% CS 2 The conversion rate can be ma...

Embodiment 2

[0030] Mix ferric nitrate and cerium nitrate in a mass ratio of 1:5 to obtain mixed nitrate; mix Fe-MOF-5 and mixed nitrate in a mass ratio of 1:0.5, add deionized water and stir for 4 hours , to obtain the mixed solution; the above mixed solution was placed in a blast drying oven and dried at 150°C for 9 hours; the dried mixture was placed in a quartz boat and placed in a tube furnace, in an oxygen-rich atmosphere at The iron-cerium-based porous catalyst was prepared by calcining at lower temperature for 4 hours.

[0031] The activity test of the catalyst was carried out in a fixed-bed quartz reactor, and the reaction conditions were: COS concentration 500ppm, CS 2 Concentration 50ppm, space velocity 50000h -1 , reaction temperature 60℃, oxygen content 5%, COS and CS 2 Catalytic conversion results see figure 2 , it can be drawn from the figure that the conversion rate of 100% COS can be maintained for 390min, and the conversion rate of 100% CS 2 The conversion rate can b...

Embodiment 3

[0033] Mix ferric nitrate and cerium nitrate at a mass ratio of 1:20 to obtain mixed nitrate; mix Fe-MOF-74 and mixed nitrate at a mass ratio of 1:1.5, add deionized water and stir for 5 hours , to obtain the mixed solution; the above mixed solution was placed in a blast drying oven and dried at 100°C for 7 hours; the dried mixture was placed in a quartz boat and placed in a tube furnace, in an oxygen-rich atmosphere at The iron-cerium-based porous catalyst was prepared by calcining at lower temperature for 5 hours.

[0034] The activity test of the catalyst was carried out in a fixed-bed quartz reactor, and the reaction conditions were: COS concentration 500ppm, CS 2 Concentration 50ppm, space velocity 50000h -1 , reaction temperature 60℃, oxygen content 5%, COS and CS 2 Catalytic conversion results see image 3 , it can be drawn from the figure that the conversion rate of 100% COS can be maintained for 450min, and the conversion rate of 100% CS 2 The conversion rate can ...

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Abstract

The invention discloses a preparation method of an iron-cerium-based porous catalyst used for removing organic sulfur and belongs to the field of atmospheric pollution control. According to the method, ferric nitrate and cerium nitrate are mixed and dissolved according to a certain proportion, then, a certain amount of MOF material is added and stirred, a mixture is placed in a drying oven to be dried, finally the dried mixture is placed in a tube furnace to be subjected to oxygen-enriched roasting, and then the iron-cerium-based porous catalyst is obtained. The catalyst is used for catalytic removing of the organic sulfur in industrial flue gas, the method is simple in process, convenient and fast to operate, and capable of continuously running, the organic sulfur in the flue gas is removed and subjected to resource utilization in the purification process, and a product is clean and free of secondary pollution.

Description

technical field [0001] The invention relates to a preparation method of an iron-cerium-based porous catalyst for removing organic sulfur, belonging to the field of air pollution control. Specifically, it is a preparation method of a porous material containing iron and cerium, which is used as a catalyst for removing organic sulfur in flue gas. Background technique [0002] As the main organic sulfur, COS, CS 2 Widely present in the atmospheric environment, it is discharged into the atmospheric environment during industrial production and use, which will cause serious pollution and harm to the environment and the human body. Trace amounts of CS in industrial production 2 and COS have a poisonous effect on the catalyst, so that its catalytic effect and service life are seriously affected, CS 2 and COS also generate H through a slow hydrolysis reaction 2 S, corroded production equipment, not only brought great economic losses to industrial production, but also increased equi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/28B01D53/86B01D53/48
CPCB01D53/8603B01D2257/306B01D2258/0283B01J31/28
Inventor 宁平宋辛李凯王驰孙鑫汤立红
Owner KUNMING UNIV OF SCI & TECH
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