Preparation of hierarchically porous carbons from coal gasification fine slag and their CO<sub>2</sub> adsorption performances

HAI Xueqin; MA Li; LV Peng; SONG Xudong; SU Weiguang; WANG Jiaofei; BAI Yonghui; YU Guangsuo

doi:10.12434/j.issn.2097-2547.20260149

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Preparation of hierarchically porous carbons from coal gasification fine slag and their CO₂ adsorption performances

更新时间：2026-06-05

- Preparation of hierarchically porous carbons from coal gasification fine slag and their CO₂ adsorption performances
- Pages: 1-9(2026)
- 作者机构：
  
  1.宁夏大学化学化工学院省部共建煤炭高效利用与绿色化工国家重点实验室，宁夏银川 750021
  2.国家能源集团宁夏煤业有限责任公司煤制油化工公用设施管理分公司，宁夏银川 750000
  3.华东理工大学洁净煤技术研究所，上海 200237
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20260149
  CLC： TQ424.29
- Received：30 March 2026，
  
  Revised：2026-04-22，
  
  Online First：03 June 2026，
- 稿件说明：
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海雪琴,马利,吕鹏等.基于煤气化细渣的分级多孔碳制备及其CO₂吸附性能[J].低碳化学与化工,

HAI Xueqin,MA Li,LV Peng,et al.Preparation of hierarchically porous carbons from coal gasification fine slag and their CO₂ adsorption performances[J].Low-Carbon Chemistry and Chemical Engineering,
海雪琴,马利,吕鹏等.基于煤气化细渣的分级多孔碳制备及其CO₂吸附性能[J].低碳化学与化工, DOI：10.12434/j.issn.2097-2547.20260149.

HAI Xueqin,MA Li,LV Peng,et al.Preparation of hierarchically porous carbons from coal gasification fine slag and their CO₂ adsorption performances[J].Low-Carbon Chemistry and Chemical Engineering, DOI：10.12434/j.issn.2097-2547.20260149.

摘要

作为典型的煤化工固体废弃物，煤气化细渣大量堆积会引发严重的生态问题。然而，煤气化细渣也是制备多孔碳的重要原料。为实现煤气化细渣资源化利用，以气流床煤气化细渣分选后的富碳组分（FC）为前驱体，采用KOH/NaOH混合碱一步活化法制备了多孔碳，并研究了

(KOH):

(NaOH)对多孔碳织构性质、表面化学状态和CO

吸附性能等的影响。结果表明，在活化过程中，KOH与NaOH表现出协同作用，可优化FC的孔隙结构。其中，

(KOH):

(NaOH) = 3:1时所得多孔碳（3(K)/1(Na)）的比表面积和总孔体积分别为534 m

/g和0.461 cm

/g。3(K)/1(Na)具有介孔-微孔的分级多孔结构，表面粗糙且骨架规整，可为CO

吸附提供充足位点和扩散通道。3(K)/1(Na)的CO

吸附量为16.8 mg/g，较FC（6.5 mg/g）显著提高。

Abstract

As a typical solid waste from the coal chemical industry

the massive accumulation of coal gasification fine slag can cause serious ecological problems. However

coal gasification fine slag is also an important raw material for the preparation of porous carbon. To realize the resource utilization of coal gasification

fine slag

the carbon-rich fraction (FC) separated from entrained-flow coal gasification fine slag was used as the precursor

and a one-step activation method with KOH/NaOH mixed alkali was adopted to prepare porous carbons. Effects of

(KOH):

(NaOH) on the textural properties

surface chemical states and CO

adsorption performances of the resulting porous carbons were investigated. The results show that KOH and NaOH exhibit synergistic effect during the activation process

which can optimize the pore structure of FC. Specifically

the porous carbon prepared at

(KOH):

(NaOH) = 3:1 (3(K)/1(Na)) possesses specific surface area of 534 m

/g and total pore volume of 0.461 cm

/g. 3(K)/1(Na) features hierarchically porous structure with both micropores and mesopores

rough surface and regular framework

which can provide abundant adsorption sites and diffusion channels for CO

. The CO

adsorption capacity of 3(K)/1(Na) reaches 16.8 mg/g

which is significantly higher than FC (6.5 mg/g).

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Keywords

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Related Institution

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CO2 Capture New Principles and Technology Research Center, Tianfu Yongxing Laboratory

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Preparation of hierarchically porous carbons from coal gasification fine slag and their CO2 adsorption performances

DOI：10.12434/j.issn.2097-2547.20260149

摘要

Abstract

关键词

Keywords

references

Preparation of hierarchically porous carbons from coal gasification fine slag and their CO₂ adsorption performances