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Method for preparing NO2 adsorption reducing material

A nitrogen dioxide and nitrogen technology, applied in the field of gas purification material preparation, can solve the problems of low selective adsorption, low proportion of mesopores, high proportion of activated carbon micropores, etc.

Inactive Publication Date: 2010-05-12
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a method for preparing a nitrogen dioxide adsorption and reduction material, which solves the problems of high micropore ratio, low mesopore ratio and NO 2 The problem of low selectivity adsorption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: comprise successively:

[0023] 1. Carbonization step: mix ginkgo wood chips with a moisture content of less than 10% and walnut shell powder in a mass ratio of 1:3, and then heat up the formed mixture from room temperature at a heating rate of 5°C / min under a nitrogen atmosphere Heat at 400°C for 1 hour to form carbonization;

[0024] 2. Activation step: at a heating rate of 5°C / min, the charcoal is heated to 800°C, kept for 4 hours, and then cooled to room temperature under a nitrogen atmosphere to obtain activated carbon;

[0025] 3. Modification treatment steps: successively immerse the activated carbon in KOH, Ce(NO 3 ) 3 ·6H 2 O and Mg(NO 3 ) 2 solution,

[0026] Soak in KOH solution for 24 hours, take it out and dry at 110°C for 24 hours, heat to 1000°C under nitrogen atmosphere, keep it warm for 1 hour, and cool to room temperature;

[0027] In Ce(NO 3 ) 3 ·6H 2 Soak in O solution for 24 hours, take it out and dry at 110°C for 24 hours, h...

Embodiment 2

[0030] 1. Carbonization step: mix oak wood chips with a moisture content of less than 10% and walnut shell powder in a mass ratio of 1:5, and then heat up the formed mixture from room temperature at a heating rate of 10°C / min under a nitrogen atmosphere Heat at 400°C for 2 hours to form carbonization;

[0031] 2. Activation step: at a heating rate of 10°C / min, the charcoal is heated to 800°C, kept for 5 hours, and then cooled to room temperature under a nitrogen atmosphere to obtain activated carbon;

[0032] 3. Modification treatment steps: the activated carbon is immersed in KOH, Ce(NO 3 ) 3 ·6H 2 O and Mg(NO 3 ) 2 solution,

[0033] Soak in KOH solution for 12 hours, take it out and dry at 130°C for 48 hours, heat to 1200°C under nitrogen atmosphere, keep it warm for 2 hours, and cool to room temperature;

[0034] In Ce(NO 3 ) 3 ·6H 2 Soak in O solution for 12 hours, take it out and dry at 130°C for 48 hours, heat to 600°C under nitrogen atmosphere, keep it warm fo...

Embodiment 3

[0037] 1. Carbonization step: Mix the woody debris with a moisture content of less than 10% and walnut shell powder according to the mass ratio of 1:4.5, and then the formed mixture is heated up from room temperature at a rate of 5°C / min under a nitrogen atmosphere Heat at 400°C for 2 hours to form carbonization;

[0038] 2. Activation step: at a heating rate of 5°C / min, the charcoal is heated to 800°C, kept for 5 hours, and then cooled to room temperature under a nitrogen atmosphere to obtain activated carbon;

[0039] 3. Modification treatment steps: successively immerse the activated carbon into KOH, Ce(NO 3 ) 3 ·6H 2 O and Mg(NO 3 ) 2 solution,

[0040] Soak in KOH solution for 24 hours, take it out and dry at 120°C for 48 hours, heat to 1150°C under nitrogen atmosphere, keep it warm for 2 hours, and cool to room temperature;

[0041] In Ce(NO 3 ) 3 ·6H 2 Soak in O solution for 24 hours, take it out and dry at 120°C for 48 hours, heat to 500°C under nitrogen atmos...

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Abstract

The invention relates to a method for preparing a NO2 adsorption reducing material, which belongs to a method for preparing a gas purifying material and solves the problems of higher micropore proportion, lower mesopore proportion and low NO2 selective adsorption of active carbon prepared by the traditional preparation method. The method sequentially comprises the steps of carbonization, activation and modification processing. The invention can obtain active carbon with high specific surface area, the specific surface areas of a mesopore and a micropore are obviously improved, and the specific surface area of the mesopore is improved to more than 40 percent; and the prepared adsorption reducing material can be used for purifying an inspiratory nitric oxide gas treating relevant diseases, such as acute lung injury and persistent pulmonary hypertension of the new born, high altitude pulmonary edema, lung transplantation reperfusion injury, acute respiratory failure, pulmonary hypertension, and the like, and also be used for separating a NO and NO2 mixed gas to produce a NO gas with high purity.

Description

technical field [0001] The invention belongs to a method for preparing a gas purification material, in particular to a method for preparing a nitrogen dioxide adsorption and reduction material. The prepared material is used in the treatment of diseases such as neonatal acute lung injury and persistent pulmonary hypertension. High-purity purification of nitrogen oxide gas. Background technique [0002] Inhalation of nitric oxide (NO) is a new respiratory rescue technology that has been used clinically since the 1990s. It has been paid attention to because of its advantages of quick curative effect, non-invasiveness and high selectivity. At present, inhalable nitric oxide is used in the treatment of neonatal acute lung injury and persistent pulmonary hypertension, perioperative period of children with congenital heart disease and pulmonary hypertension, high altitude pulmonary edema, lung transplantation reperfusion injury, acute respiratory failure, pulmonary hypertension, et...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/32B01J20/06C01B21/24B01D53/02
Inventor 胡辉陆僖
Owner HUAZHONG UNIV OF SCI & TECH
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