An efficient green route for hexamethylene-1,6-diisocyanate synthesis by thermal decomposition of hexamethylene-1,6-dicarbamate over Co3O4/ZSM-5 catalyst: An indirect utilization of CO2

Muhammad Ammar; Yan Cao; Peng He; Liguo Wang; Jiaqiang Chen; Huiquan Li

doi:10.1016/j.cjche.2017.03.032

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An efficient green route for hexamethylene-1,6-diisocyanate synthesis by thermal decomposition of hexamethylene-1,6-dicarbamate over Co₃O₄/ZSM-5 catalyst: An indirect utilization of CO₂

第25届中国过程控制会议专栏 | Updated：2026-01-06

- An efficient green route for hexamethylene-1,6-diisocyanate synthesis by thermal decomposition of hexamethylene-1,6-dicarbamate over Co₃O₄/ZSM-5 catalyst: An indirect utilization of CO₂
- An efficient green route for hexamethylene-1,6-diisocyanate synthesis by thermal decomposition of hexamethylene-1,6-dicarbamate over Co₃O₄/ZSM-5 catalyst: An indirect utilization of CO₂
- 中国化学工程学报（英文版） 2017年25卷第12期页码：1760-1770
- Affiliations：
  
  University of Chinese Academy of Sciences,Beijing,China,100049
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2017.03.032
  中图分类号：
- 纸质出版：2017
- Accepted：
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Muhammad Ammar, Yan Cao, Peng He, 等. An efficient green route for hexamethylene-1,6-diisocyanate synthesis by thermal decomposition of hexamethylene-1,6-dicarbamate over Co₃O₄/ZSM-5 catalyst: An indirect utilization of CO₂[J]. 中国化学工程学报（英文版）, 2017,25(12):1760-1770. DOI: 10.1016/j.cjche.2017.03.032.

O
Muhammad Ammar, Yan Cao, Peng He, 等. An efficient green route for hexamethylene-1,6-diisocyanate synthesis by thermal decomposition of hexamethylene-1,6-dicarbamate over Co₃O₄/ZSM-5 catalyst: An indirect utilization of CO₂[J]. 中国化学工程学报（英文版）, 2017,25(12):1760-1770. DOI: 10.1016/j.cjche.2017.03.032. DOI：

O DOI： 10.1016/j.cjche.2017.03.032.

摘要

Abstract

The utilization of CO

as rawmaterial for chemical synthesis has the potential for substantial economic and green benefits. Thermal decomposition of hexamethylene-1

6-dicarbamate (HDC) is a promising approach for indirect utilization of CO

to produce hexamethylene-1

6-diisocyanate (HDI). In this work

a green route was developed for the synthesis of HDI by thermal decomposition of HDC over Co

/ZSM-5 catalyst

using chlorobenzene as lowboiling point solvent. Different metal oxide supported catalysts were prepared by incipientwetness impregnation (IWI)

PEG-additive (PEG) and deposition precipitation with ammonia evaporation (DP) methods. Their catalytic performances for the thermal decomposition of HDC were tested. The catalyst screening results showed that Co

/ZSM-5

catalysts prepared by different methods showed different performances in the order of Co

/ZSM-5

25(PEG)

N Co

/ZSM-5

25(IWI)

N Co

/ZSM-5

25(DP)

. The physicochemical pr

operties of Co

/ZSM- 5

catalyst were characterized by XRD

FTIR

adsorption-desorption measurements

-TPD and XPS. The superior catalytic performance of Co

/ZSM-5

25(PEG)

catalyst was attributed to its relative surface content of Co

surface lattice oxygen content and total acidity. Under the optimized reaction conditions: 6.5% HDC concentration in chlorobenzene

1 wt% Co

/ZSM-5

25(PEG)

catalyst

250 ℃ temperature

2.5 h time

800 ml·min-1 nitrogen flow rate and 1.0 MPa pressure

the HDC conversion and HDI yield could reach 100% and 92.8% respectively. The Co

/ZSM-5

25(PEG)

catalyst could be facilely separated from the reaction mixture

and reused without degradation in catalytic performance. Furthermore

a possible reaction mechanism was proposed based on the physicochemical properties of the Co

/ZSM-5

catalysts.

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