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Preparation method for amino modified adsorption material

An adsorption material and amino modification technology, which is applied in chemical instruments and methods, and other chemical processes, can solve the problems of poor stability and volatility of materials in adsorption and desorption cycle, and achieve the purpose of improving selectivity and adsorption capacity, inhibiting adsorption, The effect of simple preparation process

Inactive Publication Date: 2014-04-16
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Despite the high adsorption capacity and selectivity, organic amines are prone to volatilization at high temperature, resulting in poor stability of the material for adsorption-desorption cycle

Method used

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  • Preparation method for amino modified adsorption material
  • Preparation method for amino modified adsorption material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Take 1g of 40-120 mesh MIL-101 at 100°C, vacuum degree of about 1Pa and keep it warm for 1h for degassing treatment; then add the degassed MIL-101 to the toluene solution of ethylenediamine, the solution concentration is 50mmol ethylenediamine / L toluene, the composition ratio of MIL-101 and ethylenediamine is 12mmol ethylenediamine / g MIL-101; stir at room temperature for 1h, then react for 3h at 80°C and nitrogen flow rate of 50ml / min; after the reaction product is filtered, Wash twice with ethanol, and dry at 60°C for 8 hours to obtain an amino-modified adsorbent. After testing, this material is maintained at 25°C and 100KPa for a period of time, CO 2 The equilibrium adsorption capacity reaches 2.2mmol / g, CO 2 The selectivity to CO reaches 20.1.

Embodiment 2

[0022] Take 2g of 40-120 mesh MIL-101 at 120°C and keep it under a vacuum of about 10Pa for 2 hours for degassing treatment, then add the degassed MIL-101 to the xylene solution of diethylenetriamine, the solution concentration is 100mmol Diethylenetriamine / L xylene, the composition ratio of MIL-101 and diethylenetriamine is 24mmol diethylenetriamine / g MIL-101; stir at room temperature for 2h, then react at 100°C and nitrogen flow rate of 100ml / min 5h; the reaction product was filtered, washed with ethanol three times, and dried at 80°C for 6h to obtain an amino-modified adsorbent. After testing, this material is maintained at 25°C and 100KPa for a period of time, CO 2 The equilibrium adsorption capacity reaches 2.5mmol / g, CO 2 The selectivity to CO reaches 22.3.

Embodiment 3

[0024] Take 1.5g of 40-120 mesh MIL-101 at 120°C and keep it under a vacuum of about 30Pa for 6 hours for degassing treatment, then add the degassed MIL-101 into the chlorobenzene solution of triethylenetetramine, the solution concentration is 200mmol triethylenetetramine / L chlorobenzene, the composition ratio of MIL-101 and triethylenetetramine is 48mmol triethylenetetramine / g MIL-101; stir at room temperature for 4h, then at 130°C, nitrogen flow rate 200ml / min React for 6 hours; filter the reaction product, wash with ethanol 4 times, and dry at 100° C. for 4 hours to obtain an amino-modified adsorbent. This material is maintained at 25°C, 100KPa for a period of time, CO 2 The equilibrium adsorption capacity reaches 2.7mmol / g, CO 2 The selectivity to CO reaches 25.2.

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Abstract

A preparation method for an amino modified adsorption material is used to improve the selective separation of CO2 in blast furnace gas, and belongs to the technical field of CO2 adsorption and separation. The preparation method comprises: taking porous material MIL-101 and an amino modifier as raw materials, and performing vacuum degassing, grafting reaction, filtering, drying and the like to prepare the amino modified adsorption material. Compared with conventional materials, the prepared amino modified adsorption material has the advantages of being high in adsorption quantity, strong in CO2 selectivity, recyclable and the like, and the preparation technology is simple and is easy for industrialized production.

Description

technical field [0001] The invention relates to a preparation method of an amino-modified adsorption material, which is used to improve the CO concentration in blast furnace gas. 2 Selective separation of CO 2 Adsorption separation technology field. technical background [0002] CO in the iron and steel smelting process 2 Emissions are mainly from the blast furnace ironmaking system, where smelting one ton of iron will produce 2000m 3 rich in CO 2 Blast furnace gas, due to its low calorific value, is mainly used for combustion power generation, and the actual power generation efficiency is only about 20%, resulting in a large amount of CO 2 emission. At present, research and development of blast furnace gas upgrading and utilization technologies are being carried out both at home and abroad, and the core of realizing blast furnace gas upgrading and utilization lies in CO 2 / N 2 CO in / CO system 2 low-cost separation. Existing adsorbent CO 2 The adsorption capacity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30
Inventor 李会泉王兴瑞侯新娟
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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