Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Carbon adsorbent for separating of methane and nitrogen and preparation method of carbon adsorbent

A technology of carbon adsorption and nitrogen, which is applied in the preparation of carbon adsorbents and the field of carbon adsorbents for the separation of CH4/N2, to achieve the effects of sufficient raw materials, alleviating environmental protection problems, and good desorption performance

Inactive Publication Date: 2018-05-22
TAIYUAN UNIV OF TECH
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The iodine adsorption value and specific surface area of ​​the carbon molecular sieve prepared under the optimal conditions are 985.23mg / g and 1195.52m 2 / g, but CH 4 / N 2 The separation ratio is only 2.5

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Carbon adsorbent for separating of methane and nitrogen and preparation method of carbon adsorbent
  • Carbon adsorbent for separating of methane and nitrogen and preparation method of carbon adsorbent
  • Carbon adsorbent for separating of methane and nitrogen and preparation method of carbon adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] After removing the sponge floc layer from the corn cob, crush it into a 200-mesh fine powder, mix it with a phosphoric acid solution with a concentration of 7.9% at a mass ratio of 1:6, dry it at 80°C for 40 hours, and crush it through a 60-mesh sieve. Place the pulverized sample in a muffle furnace, under the flow rate of 0.2L / min N 2 In the atmosphere, the temperature was raised to 700°C at a heating rate of 10°C / min, and activated at a constant temperature for 2 hours. The product was taken out, washed with water until neutral, and dried to obtain a carbon adsorbent.

[0035] After vacuuming and degassing the carbon adsorbent prepared above at 300°C for 3 hours, the NOVA1200e adsorption instrument of Quantachrome Company in the United States was used to measure the CH 4 and N 2 Static adsorption capacity of pure components, respectively, 13.1 cm 3 / g and 3.5cm 3 / g,CH 4 / N 2 The equilibrium separation ratio was 3.7.

Embodiment 2

[0037] After removing the sponge floc layer from the corn cob, crush it into a 200-mesh fine powder, mix it with a phosphoric acid solution with a concentration of 17.9% at a mass ratio of 1:6, dry it at 80°C for 40 hours, and crush it through a 60-mesh sieve. Place the pulverized sample in a muffle furnace, under the flow rate of 0.2L / min N 2 In the atmosphere, the temperature was raised to 700°C at a heating rate of 10°C / min, and activated at a constant temperature for 2 hours. The product was taken out, washed with water until neutral, and dried to obtain a carbon adsorbent.

[0038] According to the method of Example 1, measure carbon adsorbent to CH under 298K, 100Kpa 4 and N 2 The static adsorption capacity of the pure components is 13.8 cm 3 / g and 4.0cm 3 / g,CH 4 / N 2 The equilibrium separation ratio is 3.5.

Embodiment 3

[0040] After the sponge floc layer is removed from the corncob, it is crushed into a 200-mesh fine powder, mixed evenly with a phosphoric acid solution with a concentration of 27.9% at a mass ratio of 1:6, dried at 80°C for 40 hours, and crushed through a 60-mesh sieve. Place the pulverized sample in a muffle furnace, under the flow rate of 0.2L / min N 2 In the atmosphere, the temperature was raised to 700°C at a heating rate of 10°C / min, and activated at a constant temperature for 2 hours. The product was taken out, washed with water until neutral, and dried to obtain a carbon adsorbent.

[0041] According to the method of Example 1, measure carbon adsorbent to CH under 298K, 100Kpa 4and N 2 The static adsorption capacity of the pure components is 13.5 cm 3 / g and 4.0cm 3 / g,CH 4 / N 2 The equilibrium separation ratio was 3.4.

[0042] Adopt the NLDFT model to analyze the carbon adsorbent prepared in this embodiment under 273K CO 2 The adsorption isotherm was fitted to ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
adsorption capacityaaaaaaaaaa
adsorption capacityaaaaaaaaaa
pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a carbon adsorbent for separating of methane and nitrogen and a preparation method of the carbon adsorbent. The preparation method comprises the following steps: with corncobsas raw materials, dipping into an activating agent which is a phosphoric acid solution; drying; and then activating at high temperature in an inertia environment to obtain the carbon adsorbent. The carbon adsorbent prepared by the method is strong in a pore structure and contains a large number of micropores and a strong intermediate-pore structure; the equilibrium separation ratio of CH4 to N2 isbeyond 3.2; and compared with the carbon adsorbent prepared without phosphoric acid, the carbon adsorbent has the advantage that the separation coefficient is obviously increased.

Description

technical field [0001] The invention belongs to the technical field of adsorbents for gas separation, and relates to a method for separating CH 4 / N 2 A carbon adsorbent, and a preparation method of the carbon adsorbent. Background technique [0002] The main component of coalbed methane is CH 4 , accompanied by a small amount of heavy hydrocarbon gas and N 2 、H 2 , CO 2 , SO 2 It is a new type of clean energy that has not been exploited and utilized on a large scale. [0003] my country is a large coal-producing country with abundant reserves of coal-bed methane, ranking third in the world. However, due to the mining technology, most of the coalbed methane is discharged into the air at present, which is not only a waste of energy, but also causes air pollution and greenhouse effect. Therefore, for CH in coalbed methane 4 It is particularly important to carry out enrichment and recovery. [0004] Nowadays, the pressure swing adsorption (PSA) process has become the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30B01D53/02
CPCB01D53/02B01D2253/102B01J20/20B01J20/2808B01J2220/485
Inventor 程文萍齐金山崔杏雨马静红李瑞丰
Owner TAIYUAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com