Preparation method of iron-cerium-based porous catalyst used for removing organic sulfur

An organosulfur and catalyst technology, which is used in the preparation of cerium porous materials, iron-cerium-based porous catalysts, and iron-containing fields, can solve problems such as unreported process methods, and achieve short preparation time, strong adsorption capacity, and high specificity. The effect of surface area

Active Publication Date: 2017-04-19
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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  • Preparation method of iron-cerium-based porous catalyst used for removing organic sulfur
  • Preparation method of iron-cerium-based porous catalyst used for removing organic sulfur
  • Preparation method of iron-cerium-based porous catalyst used for removing organic sulfur

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Mix ferric 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 Hour, get the mixed solution; put the above-mentioned mixed solution in a blast drying box, dried at 130 ℃ for 8 hours; put the dried mixture in a quartz boat and placed in a tube furnace, in an oxygen-enriched atmosphere and 700 It is calcined at ℃ for 2 hours to obtain iron-cerium-based porous catalyst.

[0028] The catalyst activity test 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 See the catalytic conversion results figure 1 , It can be concluded from the figure that 100% COS conversion rate can be maintained for 420min, 100% CS 2 The conversion rate can be maintained for 630 minutes, which indicates that the iron-cerium-b...

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 , Get the mixed solution; place the above mixed solution in a blast drying box and dry at 150°C for 9 hours; put the dried mixture in a quartz boat and place it in a tube furnace, in an oxygen-rich atmosphere and 500°C After calcination for 4 hours, an iron-cerium-based porous catalyst is obtained.

[0031] The catalyst activity test 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 See the catalytic conversion results figure 2 From the figure, it can be concluded that 100% COS conversion rate can be maintained for 390min, 100% CS 2 The conversion rate can be maintained for 720min, which indicates that the iron-cerium-based poro...

Embodiment 3

[0033] Mix ferric nitrate and cerium nitrate in a mass ratio of 1:20 to obtain mixed nitrate; mix Fe-MOF-74 and mixed nitrate in a mass ratio of 1:1.5, add deionized water and stir for 5 hours , The mixed solution is obtained; the above-mentioned mixed solution is placed in a blast drying box and dried at 100°C for 7 hours; the dried mixture is placed in a quartz boat and placed in a tube furnace, in an oxygen-rich atmosphere and 400°C After calcination for 5 hours, the iron-cerium-based porous catalyst is obtained.

[0034] The catalyst activity test 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 See the catalytic conversion results image 3 From the figure, it can be concluded that 100% COS conversion rate can maintain 450min, 100% CS 2 The conversion rate can be maintained for 690 min, which indicates that the...

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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 method for preparing an iron-cerium-based porous catalyst for removing organic sulfur, and belongs to the field of air pollution control. Specifically, it is a preparation method of a porous material containing iron and cerium for the removal of organic sulfur in flue gas. Background technique [0002] As the main organic sulfur, COS, CS 2 It is widely present in the atmospheric environment. When discharged into the atmospheric environment during industrial production and use, it will cause serious pollution and harm to the environment and the human body. There is a trace amount of CS in industrial production. 2 COS and COS have toxic effects on the catalyst, which seriously affects its catalytic effect and service life. CS 2 And COS will also generate H through a slow hydrolysis reaction 2 S. Corrosion of production equipment not only brings great economic losses to industrial production, but also increases equipment investment an...

Claims

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Application Information

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Patent Type & Authority Applications(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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