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Cooper-containing mesoporous adsorbent preparation method, and prepared adsorbent and applications thereof

An adsorbent and copper mesoporous technology, which is applied in the field of preparation of copper-containing mesoporous adsorbents, can solve problems such as unfavorable cuprous oxide dispersion and oxide aggregation

Active Publication Date: 2013-08-07
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the easy aggregation of oxides during the high-temperature self-reduction process, it is not conducive to the dispersion of the target product cuprous oxide on the support.

Method used

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  • Cooper-containing mesoporous adsorbent preparation method, and prepared adsorbent and applications thereof
  • Cooper-containing mesoporous adsorbent preparation method, and prepared adsorbent and applications thereof
  • Cooper-containing mesoporous adsorbent preparation method, and prepared adsorbent and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1 Preparation of copper-containing mesoporous adsorbent

[0027] The preparation method of copper-containing mesoporous adsorbent in this embodiment is as follows:

[0028] In the first step, the copper salt is first ground, and then silicon-based mesoporous molecular sieve is added and fully ground to obtain a mixture; the mixture is roasted to obtain the copper-modified mesoporous molecular sieve.

[0029] Among them, the copper salt is at least one of copper nitrate, copper acetate, copper chloride, and copper sulfate, and the silicon-based mesoporous molecular sieve is one of SBA-15, MCM-41, and MCM-48. The molar mass ratio of the copper element contained in the copper salt to the silicon-based mesoporous molecular sieve is 1.0-10.0 mmol / g. The calcination is carried out in air atmosphere; the calcination temperature is 400°C-600°C, and the calcination time is 3-10 hours.

[0030] SBA-15 can be prepared by the following method: Dissolve 1 part by weight of...

Embodiment 2

[0048] Embodiment 2 makes the gas adsorption performance of adsorbent

[0049] The gas adsorption performance of each adsorbent was determined by gravimetric method. Take 30 mg of adsorbent and place it in a high-precision gravimetric adsorption instrument Hiden IGA-100, fill it with carbon monoxide or ethylene gas at a rate of 10 mbar / min, and adsorb at 25 °C for 50 min at each pressure point. Finally, the adsorption amount was measured.

[0050] The results are shown in the table below:

[0051]

Carbon monoxide adsorption capacity (ml / g)

Ethylene adsorption capacity (ml / g)

Case 1

7.1849

7.2632

Case 2

9.1477

8.7857

Case 3

9.2587

9.2905

Case 4

10.0570

10.0821

Case 5

6.9348

7.5545

Comparative example 1

6.3475

6.4357

Case 6

7.5649

6.8971

Case 7

9.6523

7.3291

Case 8

9.8523

8.3541

Case 9

10.5560

9.5803

Case...

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PUM

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Abstract

The present invention relates to a copper-containing mesoporous adsorbent preparation method, and the prepared adsorbent and applications thereof. The method comprises: 1, taking a copper salt, grinding, adding a silicon base mesoporous molecular sieve, and completely grinding to obtain a mixture; carrying out calcination on the mixture to prepare a copper-modified mesoporous molecular sieve; 2, dispersing the copper-modified mesoporous molecular sieve in a mixing solution of ethanol and water, then adding ammonia water to adjust the pH value of the solution, adding tetraethyl orthosilicate to carry out a reaction, filtering the obtained reaction liquid to obtain a solid, and carrying out drying and calcination on the solid to obtain an intermediate product; and 3, carrying out calcination on the intermediate product in an inert atmosphere to obtain the adsorbent finished product. The adsorbent prepared by the method can be used for adsorbing ethylene or carbon monoxide. According to the present invention, the tetraethyl orthosilicate is adopted to plate a protection layer on the copper-modified mesoporous molecular sieve, such that cuprous oxide aggregation generated on the carrier during high temperature self-reduction can be avoided so as to improve an absorption performance of the adsorbent.

Description

technical field [0001] The invention relates to a method for preparing a copper-containing mesoporous adsorbent, the obtained adsorbent and its application, belonging to the technical field of chemical gas separation. Background technique [0002] According to the applicant's understanding, ethylene is an important raw material in chemical production, but at present, the separation of ethylene usually adopts low-temperature rectification method with high energy density and large equipment investment. The adsorption separation method is considered to be a more suitable method among many separation methods because of its advantages of high efficiency, energy saving and low cost. If ethylene is separated by adsorption, the core is to develop an adsorbent with large adsorption capacity and high adsorption selectivity for ethylene. [0003] The applicant has also learned that no matter coal, oil and natural gas are used as raw materials, and steam and air are used as raw materia...

Claims

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Application Information

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IPC IPC(8): B01J20/18B01J20/30B01D53/02
Inventor 刘晓勤孙林兵殷俞刘定华
Owner NANJING UNIV OF TECH
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