Carbon aerogel natural gas adsorbing agent and preparation method and application thereof

A carbon aerogel and natural gas technology, which is applied in the preparation/purification of carbon, chemical instruments and methods, other chemical processes, etc., can solve problems such as inappropriate ANG technology, and achieve rich carbon content, which is conducive to industrialization, mechanical high intensity effect

Pending Publication Date: 2019-08-02
NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the present invention finds that the main feature of carbon aerogels used for oil absorption is that the surface has superhydrophobicity to realize oil-water separation; but this type of carbon aerogels is not suitable for ANG technology

Method used

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  • Carbon aerogel natural gas adsorbing agent and preparation method and application thereof

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Effect test

Embodiment 1

[0039] A preparation method of carbon airgel natural gas adsorbent, comprising the steps of:

[0040] (1) 2wt% konjac glucomannan was dissolved in water, stirred for 0.5h, then put into liquid nitrogen for quick freezing, the freezing time was 35h, and then freeze-dried to obtain a carbon airgel precursor;

[0041] (2) the carbon airgel precursor that step (1) obtains in N 2 Carry out carbonization at 1000°C under the atmosphere, keep it warm for 1h, in N 2 Cool to room temperature under gas protection to obtain the carbon airgel material; then use the KOH activation method to chemically activate the carbon airgel material, wash to neutrality, and obtain the carbon airgel natural gas adsorbent.

Embodiment 2

[0043] A preparation method of carbon airgel natural gas adsorbent, comprising the steps of:

[0044] (1) 1wt% chitosan was dissolved in 2wt% acetic acid solution, stirred for 2 hours, then put into liquid nitrogen for quick freezing, the freezing time was 50 hours, and then freeze-dried to obtain a carbon airgel precursor;

[0045] (2) the carbon airgel precursor that step (1) obtains in N 2 Carry out carbonization at 800°C under the atmosphere, keep warm for 1.5h, in N 2 The carbon airgel material is obtained by cooling to room temperature under gas protection; then the carbon airgel material is chemically activated by the zinc chloride activation method, washed to neutrality, and the carbon airgel natural gas adsorbent is obtained.

Embodiment 3

[0047] A preparation method of carbon airgel natural gas adsorbent, comprising the steps of:

[0048] (1) Dissolve 1wt% bacterial cellulose in NaOH / urea solvent system, stir for 3h, then heat the obtained solution in a 60°C water bath for 4h to obtain a wet gel; dry it through a carbon dioxide supercritical drying system to obtain Xerogel;

[0049] (2) Carbonize the dry gel obtained in step (1) at 700°C under an Ar atmosphere, keep it warm for 3 hours, and cool it to room temperature under the protection of Ar gas to obtain a carbon airgel material; then use the phosphoric acid activation method to chemically synthesize the product activated by the method, and washed to neutrality to obtain the carbon airgel natural gas adsorbent.

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Abstract

The invention belongs to the technical field of adsorbing storing of natural gas, and specifically relates to a carbon aerogel natural gas adsorbing agent and a preparation method and application thereof. The method comprises the following steps: (1) stirring and dissolving biomass raw materials in a solvent; quickly freezing; and performing freezing drying to obtain a carbon aerogel precursor; and (2) carbonizing the carbon aerogel precursor obtained in step (1) under a protecting atmosphere; and activating the product in a chemical manner so as to obtain the carbo aerogel natural gas adsorbing agent. The carbon aerogel material prepared by the method has the advantages of being high in abrasion resistance and mechanical intensity while high specific surface area remains; any adhering agent is not used in the forming process, so that the preparation cost and the production time are greatly decreased; in addition, the mechanical activating manner is carried out, so that the specific surface and the porosity can be further increased.

Description

technical field [0001] The invention belongs to the technical field of adsorption and storage of natural gas, and in particular relates to a carbon airgel natural gas adsorbent and its preparation method and application. Background technique [0002] The information disclosed in the Background of the Invention is only intended to increase the understanding of the general background of the invention, and is not necessarily to be taken as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art. [0003] Adsorption and storage of natural gas technology (ANG) is a high-tech in my country. It is an advanced gas storage technology and can be used for adsorption and recovery of volatile hydrocarbons in natural gas vehicles, natural gas from scattered gas wells that cannot be piped, gasoline canning workshops, and gas stations; it can replace underground The storage of natural gas in the gas storage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05B01J20/20B01J20/28B01J20/30
CPCB01J20/205B01J20/28007B01J20/28011B01J20/28047B01J20/3078B01J20/3085C01B32/05
Inventor 张晶伊希斌刘本学赵新富刘晓婵王梅侠沈晓冬
Owner NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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