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Method for preparing low-temperature denitration nitrogen-rich porous carbon material

A low-temperature denitrification and porous carbon technology, which is applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve the problems of small specific surface area and low low-temperature denitrification efficiency, and achieve easy-to-obtain, low-cost raw materials and mild operating conditions Effect

Inactive Publication Date: 2017-04-19
SHANXI XINHUA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to the existing research results, the currently reported porous carbon materials generally have shortcomings such as small specific surface area, no nitrogen-containing functional groups on the surface, and low denitrification efficiency at low temperature, and their denitrification efficiency still needs to be further improved.

Method used

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  • Method for preparing low-temperature denitration nitrogen-rich porous carbon material
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  • Method for preparing low-temperature denitration nitrogen-rich porous carbon material

Examples

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Effect test

Embodiment 1

[0025] A method for preparing a nitrogen-rich porous carbon material for low-temperature denitrification, comprising the following steps:

[0026] (1) Grind 35g of anthracite and 15g of semi-coke particles into 200-mesh coal powder; mix 21g of coal powder with 3g of carboxymethyl cellulose and 4.5g of deionized water at a stirring speed of 500r / min, and then use a flat Die rolling granulator is extruded into cylindrical shape under 10MPa pressure to obtain shaped charcoal;

[0027] (2) Carbonize the above formed carbon in a high-temperature tube furnace from room temperature to 600°C for 1 hour, then raise the temperature to 850°C, pass in 12mL / min water vapor to activate for 4 hours, and naturally cool down to room temperature to obtain porous carbon Material;

[0028] (3) Slowly drop 120mL of concentrated sulfuric acid into 54mL of concentrated nitric acid, then add 114mL of deionized water into the mixed acid solution, and cool the resulting solution to room temperature fo...

Embodiment 2

[0033] A method for preparing a nitrogen-rich porous carbon material for low-temperature denitrification, comprising the following steps:

[0034] (1) Grind 42g of bituminous coal and 18g of semi-coal particles into 225-mesh coal powder; mix 25.5g of coal powder with 6g of carboxymethyl cellulose and 8.8g of deionized water at a stirring speed of 550r / min, and then use The flat die rolling granulator is extruded into a cylindrical shape under a pressure of 25MPa to obtain shaped charcoal;

[0035] (2) Carbonize the above formed carbon in a high-temperature tube furnace from room temperature to 700°C for 2 hours, then raise the temperature to 950°C, pass in 9mL / min water vapor to activate for 3 hours, and naturally cool down to room temperature to obtain a porous carbon material ;

[0036] (3) Slowly drop 90mL of concentrated sulfuric acid into 81mL of concentrated nitric acid, then add 171mL of deionized water to the mixed acid solution, and cool the resulting solution to roo...

Embodiment 3

[0041] A method for preparing a nitrogen-rich porous carbon material for low-temperature denitrification, comprising the following steps:

[0042](1) Grind 49g fat coal and 21g semi-coke particles into 250-mesh coal powder; mix 51g coal powder with 12g resole phenolic resin and 18g deionized water at a stirring speed of 600r / min, and then use a flat die The rolling granulator is extruded into a cylindrical shape under a pressure of 40MPa to obtain shaped charcoal;

[0043] (2) Carbonize the above formed carbon in a high-temperature tube furnace from room temperature to 800°C for 3 hours, then raise the temperature to 1000°C, pass in 6mL / min water vapor for activation for 2 hours, and naturally cool down to room temperature to obtain a porous carbon material ;

[0044] (3) Slowly drop 60mL of concentrated sulfuric acid into 108mL of concentrated nitric acid, then add 228mL of deionized water into the mixed acid solution, and cool the resulting solution to room temperature for ...

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Abstract

The invention discloses a method for preparing a low-temperature denitration nitrogen-rich porous carbon material. The method includes the steps that raw coal and semi-coke particles are used as the main body, a binding agent and deionized water are used as the object, and a porous carbon material can be obtained by means of mixing, forming, carbonization and water vapor activation in sequence; and finally mixed acid oxidation and ferrous acetate reduction are carried out to form the low-temperature high-denitration efficiency nitrogen-rich porous carbon material. The raw material is low in price and easy to obtain, the process is simple and controllable, the operating conditions are mild, and the denitration rate of the nitrogen-rich porous carbon material obtained can reach 65% or above at different temperatures.

Description

technical field [0001] The invention belongs to the technical field of preparation of denitrification materials, in particular to a preparation method of a low-temperature denitrification nitrogen-rich porous carbon material. Background technique [0002] Selective Catalytic Reduction of NO in Flue Gas x It is an important technology in the field of environmental protection. Due to low NH 3 - The potential performance of SCR in industrial applications makes it gradually become a research hotspot in flue gas denitrification. In recent years, the industry has generally adopted V 2 o 5 / TiO 2 It is a denitrification catalyst that removes NO in the flue gas at an operating temperature of 300-450°C x Revert to N 2 . However, the exhaust gas temperature of existing coal-fired boilers is mainly concentrated at 100-150°C. Therefore, the study of new high-efficiency low-temperature denitrification materials has become an important task of current denitrification technology. ...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10B01D53/86B01D53/56
CPCB01D53/8628B01J27/24B01D2258/0283B01J35/60
Inventor 宋雯黄英齐嘉豪金彦任李爱叶张金凤温宇慧邢浩洋范斌杰陈冬奇郭军军裴佩赵婷
Owner SHANXI XINHUA CHEM
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