Process analysis of catalytic hydrogenation of CO<sub>2</sub> to dimethyl ether based on thermodynamic calculation

ZHENG Zeyu; CUI Lingrui; LIU Cao; HUANG Cheng; MA Hongfang; CAO Fahai

doi:10.12434/j.issn.2097-2547.20230417

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Process analysis of catalytic hydrogenation of CO₂ to dimethyl ether based on thermodynamic calculation

- Process analysis of catalytic hydrogenation of CO₂ to dimethyl ether based on thermodynamic calculation
- Vol. 49, Issue 10, Pages: 103-109(2024)
- 作者机构：
  
  1.华东理工大学化工学院上海 200237
  2.华东理工大学化工学院大型工业反应器工程教育部工程研究中心上海 200237
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20230417
  CLC： TQ51;O642
- Published：25 October 2024，
  
  Received：20 December 2023，
  
  Revised：31 January 2024，
- 稿件说明：
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郑泽宇,崔灵瑞,刘操等.基于热力学计算的CO₂催化加氢制二甲醚流程分析[J].低碳化学与化工,2024,49(10):103-109.

ZHENG Zeyu,CUI Lingrui,LIU Cao,et al.Process analysis of catalytic hydrogenation of CO₂ to dimethyl ether based on thermodynamic calculation[J].Low-carbon Chemistry and Chemical Engineering,2024,49(10):103-109.
郑泽宇,崔灵瑞,刘操等.基于热力学计算的CO₂催化加氢制二甲醚流程分析[J].低碳化学与化工,2024,49(10):103-109. DOI： 10.12434/j.issn.2097-2547.20230417.

ZHENG Zeyu,CUI Lingrui,LIU Cao,et al.Process analysis of catalytic hydrogenation of CO₂ to dimethyl ether based on thermodynamic calculation[J].Low-carbon Chemistry and Chemical Engineering,2024,49(10):103-109. DOI： 10.12434/j.issn.2097-2547.20230417.

摘要

二甲醚是一种理想的发动机清洁燃料，在碳中和背景下，国内外积极开展了以二氧化碳（CO

）为原料制备二甲醚的研究。CO

催化加氢制二甲醚的方法主要包括一步法和两步法，对基于不同方法的工艺流程展开热力学分析，可为工艺流程优化和相关催化剂开发提供参考。基于一步法构建了流程一，基于两步法分别构建了流程二（以甲醇为中间体）和流程三（以CO为中间体），在原料气组成为

(CO

) = 3:1的条件下，对反应温度（150~350 ℃）与反应压力（1.0~9.0 MPa）对各流程中相应的平衡常数、CO

平衡转化率和二甲醚收率的影响进行了研究。结果表明，在150 ℃、9.0 MPa下，与其他两种流程相比，流程一更具优势，其CO

平衡转化率为94.61%，二甲醚收率为85.31%。对于以CO为中间体的两步法工艺，未来需加强高效逆水煤气低温催化剂的开发。对于一步法工艺，将反应体系与分离体系进行耦合的复合体系是未来主要的研究方向。

Abstract

Dimethyl ether is an ideal engine clean fuel. Under the background of carbon neutrality

the preparation of dimethyl ether from CO

has been actively carried out at home and abroad. The methods of catalytic hydrogenation of CO

to dimethyl ether mainly include one-step and two-step method. The thermodynamic analysis of the processes based on different methods can provide reference for process optimization and related catalyst development. Process one was constructed based on the one-step method

and process two (with methanol as the intermediate) and process three (with CO as the intermediate) were respectively constructed based on the two-step method. Under the condition that the composition of raw gas is

(CO

) = 3:1

the effects of reaction temperatures (from 150 ℃ to 350 ℃) and reaction pressures (from 1.0 MPa to 9.0 MPa) on the corresponding equilibrium constants

equilibrium conversion rates and dimethyl ether yields in each process were studied. The results show that at 150 ℃ and 9.0 MPa

the process one is superior to the other two processes

with CO

equilibrium conversion rate of 94.61% and dimethyl ether yield of 85.31%. For the two-step method process with CO as the intermediate

the development of high efficiency reverse water gas low temperature catalyst should be strengthened in the future. For the one-step

method process

the composite system coupling reaction system and separation system is the main research direction in the future.

关键词

二氧化碳催化加氢二甲醚流程分析热力学计算

Keywords

carbon dioxidecatalytic hydrogenationdimethyletherprocess analysisthermodynamic calculation

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Process analysis of catalytic hydrogenation of CO2 to dimethyl ether based on thermodynamic calculation

DOI：10.12434/j.issn.2097-2547.20230417

摘要

Abstract

关键词

Keywords

references

Process analysis of catalytic hydrogenation of CO₂ to dimethyl ether based on thermodynamic calculation