Factors affecting decarbonization of natural gas with MDEA+MEA

CHEN Jie; ZHANG Xinjun; CHU Jie; SHI Zelin; TANG Jianfeng

doi:10.11949/j.issn.0438-1157.20150698

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Factors affecting decarbonization of natural gas with MDEA+MEA

更新时间：2025-12-10

- Factors affecting decarbonization of natural gas with MDEA+MEA
- CIESC Journal Issue S2, Pages: 250-256(2015)
- 作者机构：
  
  1. 中海石油气电集团技术研发中心,北京,100027
  2. 中国石油大学(华东)储运与建筑工程学院,山东,青岛,266580
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20150698
  CLC： E644
- Online First：31 August 2015，
  
  Published：31 August 2015
- 稿件说明：
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CHEN Jie, ZHANG Xinjun, CHU Jie, et al. Factors affecting decarbonization of natural gas with MDEA+MEA[J]. CIESC Journal, 2015, (S2): 250-256.
DOI：

CHEN Jie, ZHANG Xinjun, CHU Jie, et al. Factors affecting decarbonization of natural gas with MDEA+MEA[J]. CIESC Journal, 2015, (S2): 250-256. DOI： 10.11949/j.issn.0438-1157.20150698.

摘要

基于自主设计建设的胺法脱酸中试实验装置

针对目前常用的天然气脱碳方法醇胺法

利用工业中应用较多的N-甲基二乙醇胺(MDEA)+一乙醇胺(MEA)的前期优选配方(2 mol·L-1+1 mol·L-1)

进行醇胺法脱碳装置工艺参数优化实验研究

结果用于指导工业生产。本文在CO2含量6%和4%两种原料气气质下

采用控制变量法

分析了吸收和再生参数对胺法脱碳工艺的影响规律

优选出操作参数。结果显示:在本实验操作参数范围内提高吸收温度、吸收压力和胺液循环流量有利于提高胺液吸收性能

提高再生温度、降低再生压力有利于提高胺液再生性能

但各参数受到反应机理、气液平衡、装置能耗、胺液性质等影响

存在最优值;本实验装置系统下

原料气处理量为50 Nm3·h-1时

MDEA+MEA脱碳的优化工艺操作参数为:吸收温度55℃

吸收压力3.5~4 MPa

胺液循环流量0.25 m3·h-1

再生温度120℃

再生压力50 kPa。

Abstract

Based on the independently designed amine deacidification experimental device

the experiment adopted the common-used oxyamine process and preliminary preferred amine formulation (2 mol·L-1+1 mol·L-1) to study the optimization of operating parameters of alcohol amine gas decarbonization.The result are will be used to guide the industrial production.This paper analyzed the influence of the operating parameters on the amine decarbonization process under the control variable method with 6% and 4% CO2 content and get the optimizing operating parameter.The results show that: the increase of the absorption temperature

the absorption pressure

and the amine solution circulation flow can improve amine absorption performance

the increase of the performance.However

all the parameters are influenced by the reaction mechanism

vapor-liquid equilibrium

the energy consumption

the nature of the amine solution and other factors

there is an optimal value; Under this experimental system

when the raw gas processing capacity is 50 Nm3·h -1

The optimization results of operating parameters are as follows: the absorption temperature is 55℃

the absorption pressure is 3.5-4 MPa

the amine solution circulation flow is 0.25 m3·h-1

the regeneration temperature is 120℃ and the regeneration pressure is 50 kPa.

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SHI Zelin

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