K2CO3-KCl熔盐制备煤沥青基多孔炭用于CH4/N2吸附分离

王佳玮; 张楚杰; 景佳鑫; 杨旭; 王玉高; 杨江峰

doi:10.12434/j.issn.2097-2547.20260019

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K₂CO₃-KCl熔盐制备煤沥青基多孔炭用于CH₄/N₂吸附分离

更新时间：2026-07-21

- K₂CO₃-KCl熔盐制备煤沥青基多孔炭用于CH₄/N₂吸附分离
- Preparation of coal tar pitch-based porous carbon from K₂CO₃-KCl molten salt for CH₄/N₂ adsorption and separation
- 低碳化学与化工 2026: 1-10.
- 作者机构：
  
  太原理工大学化学与化工学院，山西太原 030024
- 作者简介：
  
  王佳玮（2000—），硕士研究生，研究方向为沥青基多孔炭材料制备，E-mail：wei438577168@163.com。
  王玉高（1988—），博士，教授，研究方向为煤基多孔材料研制及温室气体分离转化，E-mail：wangyugao@tyut.edu.cn。
- 基金信息：
  
  国家自然科学基金面上项目(22478271);2025青年教师科研创新能力支持项目(2025Q008)
- DOI：10.12434/j.issn.2097-2547.20260019
  中图分类号： TQ028.1
- 收稿：2026-01-12，
  
  修回：2026-03-04，
  
  网络首发：2026-07-20，
- 稿件说明：
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王佳玮,张楚杰,景佳鑫等.K₂CO₃-KCl熔盐制备煤沥青基多孔炭用于CH₄/N₂吸附分离[J].低碳化学与化工,DOI:10.12434/j.issn.2097-2547.20260019.

WANG Jiawei,ZHANG Chujie,JING Jiaxin,et al.Preparation of coal tar pitch-based porous carbon from K₂CO₃-KCl molten salt for CH₄/N₂ adsorption and separation[J].Low-Carbon Chemistry and Chemical Engineering,DOI:10.12434/j.issn.2097-2547.20260019.
王佳玮,张楚杰,景佳鑫等.K₂CO₃-KCl熔盐制备煤沥青基多孔炭用于CH₄/N₂吸附分离[J].低碳化学与化工,DOI:10.12434/j.issn.2097-2547.20260019. DOI：

WANG Jiawei,ZHANG Chujie,JING Jiaxin,et al.Preparation of coal tar pitch-based porous carbon from K₂CO₃-KCl molten salt for CH₄/N₂ adsorption and separation[J].Low-Carbon Chemistry and Chemical Engineering,DOI:10.12434/j.issn.2097-2547.20260019. DOI：

摘要

高效分离是低浓度煤层气资源化利用的关键。为开发高性能吸附剂，以中温煤沥青（CTP）为炭前驱体，采用兼具活化、阻燃与模板功能的K

-KCl混合熔盐体系，在空气氛围下通过一步炭化工艺制备了煤沥青基多孔炭（CTP-

，

为炭化温度）。系统探究了炭化温度对CTP-

织构性质、表面化学性质及20%CH

/80%N

（以下简写为“CH

”）吸附分离性能的影响。结果表明，CTP-

富含微孔结构与含氧官能团，其中CTP-700 CH

吸附分离性能最优，其比表面积达863.04 m

/g，微孔孔隙率为96%，298 K下CH

吸附量为25.09 cm

/g，基于理想吸附溶液理论（IAST）计算的CH

吸附分离选择性为6.27。动态穿透测试和变压吸附模拟证实，CTP-700对CH

混合气具有良好分离效果，为低浓度煤层气高效利用提供了良好吸附材料与技术支撑。

Abstract

Efficient CH

separation is crucial for the resource utilization of low-concentration coalbed methane. To develop high-performance adsorbents

medium-temperature coal tar pitch (CTP) was used as the carbon precursor and a K

-KCl mixed molten salt system with activation activation

flame-retardant and template functions

was used to prepare coal tar pitch-based porous carbon (CTP-

where

represents carbonization temperatures) via a one-step carbonization process under air atmosphere. The effects of carbonization temperatures on textural properties

surface chemical properties

and 20%CH

/80%N

(abbreviated as “CH

” below) adsorption and separation performances of CTP-

were

investigated. The results show that CTP-

is rich in micropores structures and oxygen-containing functional groups. The CTP-700 shows the best CH

adsorption and separation performance with the specific surface area of 863.04 m

/g and micropore porosity of 96%. Its CH

adsorption capacity is 25.09 cm

/g at 298 K and CH

adsorption and separation selectivity calculated based on ideal adsorption solution theory (IAST) is 6.27. Dynamic breakthrough tests and pressure swing adsorption simulations confirm that CTP-700 shows a good separation effect on CH

mixed gas

providing good adsorbent materials and technical supports for efficient utilization of low-concentration coalbed methane.

关键词

Keywords

references

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