成型压力对钛铝基COS水解催化剂催化性能的影响机理

王震; 梁丽彤; 杨超; 樊惠玲; 陈兆辉

doi:10.12434/j.issn.2097-2547.20250195

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成型压力对钛铝基COS水解催化剂催化性能的影响机理

更新时间：2026-01-07

- 成型压力对钛铝基COS水解催化剂催化性能的影响机理
- Mechanism of effect of forming pressure on catalytic performances of Ti-Al-based COS hydrolysis catalysts
- 低碳化学与化工 2026: 1-11.
- 作者机构：
  
  1.太原理工大学省部共建煤基能源清洁高效利用国家重点实验室，山西太原 030024
  2.中国科学院过程工程研究所介科学与工程全国重点实验室，北京 100190
- 作者简介：
  
  王震（2000—），硕士研究生，研究方向为气体分离与净化，E-mail：wz20220728@163.com。
  陈兆辉（1983—），博士，研究员，博士研究生导师，研究方向为热化学转化，E-mail：zhhchen@ipe.ac.cn。
- 基金信息：
  
  国家自然科学基金(22078223)
- DOI：10.12434/j.issn.2097-2547.20250195
  中图分类号： TQ426.6;TQ050.6
- 收稿：2025-04-22，
  
  修回：2025-05-12，
  
  网络出版：2026-01-06，
- 稿件说明：
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王震,梁丽彤,杨超等.成型压力对钛铝基COS水解催化剂催化性能的影响机理[J].低碳化学与化工,

WANG Zhen,LIANG Litong,YANG Chao,et al.Mechanism of effect of forming pressure on catalytic performances of Ti-Al-based COS hydrolysis catalysts[J].Low-Carbon Chemistry and Chemical Engineering,
王震,梁丽彤,杨超等.成型压力对钛铝基COS水解催化剂催化性能的影响机理[J].低碳化学与化工, DOI：10.12434/j.issn.2097-2547.20250195.

WANG Zhen,LIANG Litong,YANG Chao,et al.Mechanism of effect of forming pressure on catalytic performances of Ti-Al-based COS hydrolysis catalysts[J].Low-Carbon Chemistry and Chemical Engineering, DOI：10.12434/j.issn.2097-2547.20250195.

摘要

脱除高炉煤气中COS是钢铁行业满足超低排放要求的必要条件。目前开发的COS水解催化剂容易氧中毒失活，使用寿命短，难以满足工业应用要求。采用干混法，分别使用10 MPa、19 MPa和43 MPa 3种成型压力挤条，制备了钛铝（TiO

-Al

）基COS水解催化剂。在反应温度60 ℃、COS质量浓度300 mg/m

、O

体积分数12%和空速1000 h

-1

的条件下，对催化剂进行了催化性能测试；并采用N

吸/脱附、MIP、SEM和XPS等手段，探究了成型压力对催化剂催化性能的影响机理。结果表明，催化水解过程

中，COS从催化剂外部通过孔扩散到达内部，吸附于催化剂内表面，与—OH或H

O发生水解反应生成H

S和CO

，随后H

S和CO

通过孔扩散转移至催化剂外表面。随着成型压力增大，催化剂颗粒逐渐致密化，微观上使得部分100~1000 nm大孔压缩坍塌，形成宏观上的10~360 μm超大孔，显著阻碍了COS的吸附和H

S的扩散；H

S吸附增多，被氧化并沉积在催化剂表面。氧空位的存在可以促进氧迁移，并在一定程度促进了COS的吸附和H

S的扩散，也在一定程度抑制了硫沉积。本研究可为实验室相关成果工业化转化提供参考。

Abstract

The removal of COS from blast furnace gas is essential for the steel industry to meet ultra-low emission requirements. At present

COS hydrolysis catalysts that have been developed are prone to oxygen poisoning and deactivation

have a short service life

and thus cannot meet the requirements of industrial applications. Ti-Al-based (TiO

-Al

) COS hydrolysis catalysts were prepared by a dry mixing method extruded at forming pressures of 10 MPa

19 MPa and 43 MPa

respectively. Under the conditions of 60 ℃

COS mass concentration of 300 mg/m

volume fraction of 12% and gas hourly space velocity of 1000 h

-1

the catalytic performances of the catalysts were tested. In addition

adsorption/desorption MIP

SEM and XPS were employed to investigate the mechanism by which forming pressure affects catalytic performance. The results show that during catalytic hydrolysis

COS diffuses from the external surface of the catalyst through pores to the internal surface

where it is adsorbed and undergoes a hydrolysis reaction with —OH or H

O to produce H

S and CO

. These products then diffuse outward through the pores to the external surface of the catalyst. As the forming pressure increases

the catalyst particles become gradually densified. Microscopically

part of the 100 nm to 1000 nm macropores are compressed and collapsed

forming ultramacropores of 10 μm to 360 μm at the macroscopic scale

which significantly hinders COS adsorption and H

S diffusion. Increased H

S adsorption

further leads to oxidation and sulfur deposition on the catalyst surface. The presence of oxygen vacancies can promote oxygen migration

which to some extent enhances COS adsorption and facilitates the diffusion of H

thereby partially suppressing sulfur deposition. This study provides a reference for the industrial application of related laboratory research results.

关键词

Keywords

references

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