A microporous carbon adsorbent for separating alkenes and alkanes, its preparation method and application

A technology of alkenes, alkanes, and microporous carbons, applied in separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve problems such as low selectivity, complex amorphous structure, lack of fine control, etc., and achieve low gas mass transfer resistance , Fast diffusion and mass transfer rate, long service life

Active Publication Date: 2022-03-08
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Porous carbon adsorbent has complex amorphous structure characteristics. Due to the lack of effective means to fine-tune the pore size, configuration and carbon wall polarity of porous carbon, the selectivity is low when used for the separation of ethylene, ethane or propylene propane with the same carbon number.

Method used

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  • A microporous carbon adsorbent for separating alkenes and alkanes, its preparation method and application
  • A microporous carbon adsorbent for separating alkenes and alkanes, its preparation method and application
  • A microporous carbon adsorbent for separating alkenes and alkanes, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] (1) Preparation of polymer

[0087] Take 1.5g of acetone, 0.1g of deionized water and 1.3mL of graphene oxide dispersion into the reactor, stir well, then add 0.59g of aniline and 1g of resorcinol to the reactor, stir well, then add 1.35 g formaldehyde solution, stir evenly, heat up to 40°C, react for 8h, then pour the above polymer into a quartz tube reactor, put it in a constant temperature oven for gel aging, the aging temperature is 90°C, the aging time is 18h, and the aging is over Finally, the polymer was taken out, dried to a constant weight for later use, and the sample number was named UMC-1.

[0088] (2) Preparation of microporous carbon adsorbent

[0089] The prepared polymer UMC-1 was placed in a porcelain boat in a carbonization furnace, under argon atmosphere purging, at 3 °C min -1 The heating rate was raised from room temperature to 700°C and kept for 2 hours to prepare a microporous carbon adsorbent, the sample number of which was UMC-1-700-3.

[0090]...

Embodiment 2

[0092] (1) Preparation of polymer

[0093] Take 0.022g of boron nitride, 1.5g of acetone and 1.5g of deionized water into the reactor, stir well, then add 1.2g of p-phenylenediamine and 1.3g of mixed cresol into the reactor, stir well, then add 1.35g formaldehyde solution, stir evenly, heat up to 40°C, react for 8h, then pour the above polymer into a quartz tube reactor, put it in a constant temperature oven for gel aging, the aging temperature is 90°C, the aging time is 18h, aging After the end, the polymer was taken out, dried to a constant weight for later use, and the sample number was named UMC-2.

[0094] (2) Preparation of microporous carbon adsorbent

[0095] The prepared polymer UMC-2 was placed in a porcelain boat in a carbonization furnace, and under an argon atmosphere purging, the -1 The heating rate was raised from room temperature to 700°C and kept for 2 hours to prepare a microporous carbon adsorbent, and the sample number was named UMC-2-700-3.

[0096] Spe...

Embodiment 3

[0098] (1) Preparation of polymer

[0099] Get 1.5g acetone, 0.3g deionized water and 1mL graphene oxide dispersion liquid and join in the reactor, stir evenly, then add 1.8g m-phenylenediamine and 1g phloroglucinol successively in the reactor, stir evenly, then Add 1.35g of formaldehyde solution, stir evenly, heat up to 40°C, react for 8h, then pour the above polymer into a quartz tube reactor, put it in a constant temperature oven for gel aging, the aging temperature is 90°C, and the aging time is 18h. After aging, the polymer was taken out and dried to constant weight for later use. The sample number was named UMC-3.

[0100] (2) Preparation of microporous carbon adsorbent

[0101] The prepared polymer UMC-3 was placed in the porcelain boat of the carbonization furnace, under the argon atmosphere purging, at 3 °C min -1 The heating rate was raised from room temperature to 700°C and kept for 2 hours to prepare a microporous carbon adsorbent, and the sample number was named...

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Abstract

The invention belongs to the field of gas separation, and in particular relates to a porous adsorbent for separating alkenes and alkanes and its preparation method and application. The microporous carbon adsorbent for separating alkenes and alkanes of the present invention is obtained by the following preparation method: (1) Add two-dimensional nanomaterials, water and organic solvents in proportion; (2) sequentially add aromatic amine compounds, phenolic compounds and aldehyde compounds to the mixture in step (1) in proportion to obtain polymers; (3) combine the above The polymer is subjected to gel aging to obtain an aged polymer; (4) the above-mentioned aged polymer is subjected to carbonization treatment under an inert atmosphere condition to obtain a microporous carbon adsorbent product. The skeleton structure of the microporous carbon adsorbent provided by the present invention is connected by nano-carbon sheets with a thickness of 50-350nm. Alkanes are highly selective.

Description

technical field [0001] The invention belongs to the field of gas separation, and relates to a porous carbon adsorbent, in particular to a porous carbon adsorbent for separating alkenes and alkanes, a preparation method and application thereof. Background technique [0002] The separation and purification of multi-component low-carbon olefin and alkane mixtures is one of the most important chemical processes in the petrochemical industry, especially the separation of ethylene, ethane and propylene propane. Industrially, low-temperature rectification is used for separation, but since the difference between the boiling points of ethylene and ethane is only 15°C, and the difference between the boiling points of propylene and propane is only 5.3°C, the separation is difficult and consumes a lot of energy. [0003] Adsorption separation is an energy-saving gas separation technology, and the core of the adsorption separation process is the adsorbent. The currently disclosed adsorb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/02
CPCB01J20/20B01D53/02Y02C20/20
Inventor 陆安慧李文翠郭丽萍刘汝帅
Owner DALIAN UNIV OF TECH
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