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Dephosphorization catalytic reaction process and catalyst for yellow phosphorus tail gas

A yellow phosphorus tail gas, catalytic reaction technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve problems such as increasing energy consumption, and achieve low preparation costs , to meet the requirements of combustion power generation, the effect of easy operation and operation

Active Publication Date: 2014-10-01
BEIJING PEKING UNIV PIONEER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Heating a large amount of gas to a high temperature increases energy consumption. Therefore, a technical problem that researchers in this field need to solve is to provide a dephosphorization catalyst for yellow phosphorus tail gas purification, which can continuously dephosphorize at a lower reaction temperature. reduce energy consumption

Method used

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  • Dephosphorization catalytic reaction process and catalyst for yellow phosphorus tail gas

Examples

Experimental program
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Effect test

example 1

[0062] Example 1: In this example, the supported active component of the catalyst is copper nitrate, and the catalyst carrier is an activated carbon fiber carrier. The specific preparation method is:

[0063] Weigh 34.10g of copper nitrate, dissolve it evenly, prepare it as 2L aqueous solution, add 800ml of activated carbon fiber carrier, impregnate it under vacuum for 4 hours, stop vacuuming, slowly add aqueous solution of potassium dihydrogen phosphate of saturated concentration to it 2L, adjust the pH value to about 9, filter after aging for 12 hours, and dry at 120°C.

[0064] This catalyst was packed in a fixed bed reactor. The temperature of the fixed bed catalytic reactor is set at 160°C; the space velocity is set at 6000h -1 , the water vapor content in the reaction gas is 25%. The total phosphorus before the yellow phosphorus tail gas purification is 770mg / m 3 , total sulfur 3500mg / m 3 . After passing through the fixed bed reactor for purification, the total phos...

example 2

[0065] Example 2: In this example, ferric chloride is used as the loaded active component of the catalyst, and the activated carbon carrier is a surface-treated activated carbon fiber carrier. The specific preparation method is:

[0066] Take by weighing 13.52g ferric chloride, be prepared as 500ml aqueous solution, add 200ml active carbon fiber carrier, after impregnating 4h under the vacuum condition, stop vacuuming, slowly add the potassium dihydrogen phosphate aqueous solution 500ml of saturated concentration therein, adjust the pH value to 10 or so, after aging for 12 hours, filter and dry at 120°C.

[0067] This catalyst was packed in a fixed bed reactor. The temperature of the fixed bed catalytic reactor is set at 180°C; the space velocity is set at 10000h -1 , The reaction gas contains 30% water vapor. Total phosphorus before purification of yellow phosphorus tail gas 890mg / m 3 , total sulfur 3000mg / m 3 . After passing through the fixed bed reactor for purificatio...

example 3

[0068] Example 3: In this example, the supported active component of the catalyst is copper chloride, and the catalyst carrier is an activated carbon fiber carrier. The specific preparation method is:

[0069] Weigh 13.64g copper chloride, prepare 1L aqueous solution, add 400ml activated carbon fiber carrier, and impregnate under vacuum condition for 4h. After stopping vacuuming, slowly add potassium dihydrogen phosphate aqueous solution of saturated concentration to it, adjust the pH value to about 9, filter after aging for 12 hours, and dry at 120°C.

[0070] This catalyst was packed in a fixed bed reactor. The temperature of the fixed bed catalytic reactor is set at 200°C; the space velocity is set at 5000h -1 , the water vapor content in the reaction gas is 25%. Total phosphorus before purification of yellow phosphorus tail gas 830mg / m 3 , total sulfur 2000mg / m 3 . After passing through the fixed bed reactor for purification, the total phosphorus in the yellow phospho...

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Abstract

The invention provides a dephosphorization catalytic reaction process and a catalyst for yellow phosphorus tail gas. The dephosphorization catalytic reaction process includes: injecting liquid water or water vapor into the yellow phosphorus tail gas according to a preset volume percentage to form a gas-water mixture, and feeding the gas-water mixture though the catalyst according to a preset space velocity after the gas-water mixture is preheated to transform into a gas state, wherein the total phosphorus is subjected to catalytic oxidation to produce phosphoric oxides, and the phosphoric oxides produce phosphoric acid after contacting water vapor, are desorbed at a reaction temperature of 150-200 DEG C and flow out in a gas state along with the reaction tail gas. The reaction process and the catalyst can achieve continuous dephosphorization at a low reaction temperature, thus reducing energy consumption.

Description

technical field [0001] The invention relates to a dephosphorization catalytic reaction process and catalyst for yellow phosphorus tail gas. Background technique [0002] In the production process of yellow phosphorus, phosphate ore is reduced by coke in a high-temperature electric furnace, carbon is discharged from the electric furnace above in the form of CO and phosphorus in the form of elemental phosphorus (mainly elemental phosphorus), and other species are slag (mainly calcium silicate) The form comes out from below the electric furnace. After the high-temperature gas is cooled by several stages of water spraying, the phosphorus vapor turns into liquid yellow phosphorus and enters the phosphorus receiving tank, and the uncondensed furnace gas is the yellow phosphorus tail gas. The main available components of yellow phosphorus tail gas are CO, accounting for about 80-90%, and the others are dust, water vapor, CH 4 , CO 2 , N 2 , O 2 , arsine, hydrogen fluoride, tot...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01J23/72B01J23/745
Inventor 勾华杰高翊蒋化唐伟张佳平耿云峰童显忠谢有畅
Owner BEIJING PEKING UNIV PIONEER TECH
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