Adsorbing agent for removing trace amount of nitric oxide in carbon dioxide and preparation

A carbon dioxide and nitric oxide technology, applied in the field of environmental resources, can solve the problems of adsorption capacity, limited adsorption capacity, low metal utilization rate, etc., and achieve high purification capacity, high thermal stability and thermal regeneration, and good adsorption capacity. Effect

Inactive Publication Date: 2008-11-05
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adsorption of NO under anaerobic conditions is very limited, and only the conversion of NO into NO 2 , in order to better absorb and store
[0005] In the literature (Langmuir 17 (2001) 4997-5003), H

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Accurately weigh 80g of HZSM-5 (25) raw powder and 20g of pseudo-boehmite (both on a dry basis); use a 100-200 mesh sieve to thoroughly mix the two, add 5% nitric acid, and stir into sand After that, the squeezing bar machine squeezed into a bar with a diameter of 2.5mm; dried at room temperature and transferred to an oven, dried at 120°C for 12 hours, placed in a muffle furnace, and heated at a rate of 10°C / min at room temperature It is calcined at a constant temperature of 550°C for 5 hours to prepare a hard white alumina-HZSM-5 composite carrier.

[0028] Accurately weigh 309mg Ce(NO 3 ) 4 ·6H 2 O, add 95ml of deionized water to dissolve, and this solution impregnates 99.7g of the above composite carrier. After immersion, it is placed at room temperature for 4 hours, transferred to an oven, dried at 105°C for 12 hours, then placed in a muffle furnace, heated to 500°C at room temperature at 10°C / min, and roasted at a constant temperature for 3 hours to prepare the adsorpt...

Embodiment 2

[0030] Accurately weigh 7.902g Co(NO 3 ) 2 ·6H 2 O, add 36ml of deionized water to dissolve, soak 40g of adsorbent precursor P with this solution, put it at room temperature for 4 hours after dipping, transfer to an oven, dry at 105°C for 12 hours, then put it in a muffle furnace at room temperature Next, the temperature was increased to 500°C by a program of 10°C / min, and the temperature was roasted for 5 hours to prepare the NO adsorbent (YC-1).

Embodiment 3

[0032] Accurately weigh 7.925g Ni(NO 3 ) 2 ·6H 2 O, add 36 ml of deionized water to dissolve, and impregnate 40 g of the adsorbent precursor P with this solution, and prepare the NO adsorbent (YC-2) according to the operation method of Example 2.

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PUM

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Abstract

The invention relates to an adsorbent for removing trace amount of nitric oxide in carbon dioxide and a preparation method thereof, and pertains to the technical field of environment resources and is characterized by providing the adsorbent prepared by taking alumina-HZSM-5 as a carrier and the preparation method, which is used for removing the trace amount of nitric oxide in carbon dioxide; the carrier of the adsorbent loads an activation auxiliary agent Ce salt and one of active components of Co, Ni and Mn, or two metal salts of Mn and Ni or Mn and Co by an equal volume impregnation-high temperature roasting method. The invention have the effects and benefits that the adsorbent has high purification degree and good thermal stability, can be able to remove the nitric oxide in the carbon dioxide to lower than 0.1ppmv under an oxygen free condition and an aerobic condition, and can be reproduced by being heated and scavenged with dry air, nitrogen and carbon dioxide after adsorption saturation; the invention provides a key technology for the preparation of food-grade carbon dioxide and has wide application prospect.

Description

Technical field [0001] The invention belongs to the technical field of environmental resources, and relates to an adsorbent for removing trace amounts of nitric oxide in carbon dioxide and a preparation method thereof. Background technique [0002] Food grade CO 2 Not only an important additive in the food industry, but also in CO 2 The applications in the polyester industry and the medical field are becoming more and more extensive. Recovery of CO in flue gas 2 Often accompanied by trace nitrogen oxides (NO and NO 2 ), where the content of NO accounts for NO x It is more than 90%, and it is difficult to remove. CO 2 Other light components in the impurities can be separated by low-temperature rectification, but because the concentration of NO is very low (<200ppmv), and after a period of time, it is easy to oxidize to NO 2 , Can not be removed by distillation, so that CO 2 Meet food grade requirements. At present, the main application methods for NO removal are catalytic reduc...

Claims

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Application Information

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IPC IPC(8): B01J20/18B01J20/30B01D53/04
CPCY02C10/08Y02C20/40
Inventor 陈绍云张永春郭新闻
Owner DALIAN UNIV OF TECH
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