Monitoring, modeling, and optimization of parameters affecting the recovery efficiency of acid gases from a sweetening unit

Q1 Earth and Planetary Sciences
Walaa Mahmoud Shehata, Ehab Ibrahim Abd-elhamid, Fatma Khalifa Gad
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引用次数: 0

Abstract

Amine processes are the advanced technology available today for the removal of carbon dioxide (CO2) and hydrogen sulfide (H2S) acid gases. Methyldiethanolamine (MDEA) is a well-known tertiary amine used selectively for the removal of carbon dioxide from natural gas. There are many parameters that can affect the efficiency of separating these acid gases from natural gas. In this paper, we have studied, modeled, and optimized different operating parameters of sour gas feed and MDEA solution which affect the CO2 recovery efficiency from an existing sweetening unit. These operating parameters are the sour gas feed temperature and pressure, volume ratio (%) of carbon dioxide in the feed gas, amine inlet temperature, and amine circulation rate. Actual data were collected from an industrial CO2 sweetening unit over one year. These data were used to study the effect of the studied operating parameters on the recovery efficiency of CO2 from the sweetening unit. All studied operating parameters were found to have an impact on the recovery efficiency of the removed gases. A response surface methodology approach was used in Design-Expert software version 13 to model the relationship between considered operating parameters and CO2 recovery efficiency. In addition, Design Expert numerical optimization has been used to maximize CO2 recovery efficiency. The results showed that the optimal range of sour gas feed temperature is 34.71 to 45.56 °C, sour gas feed pressure is 8.32 to 10.04 barg, the volume ratio (%) of carbon dioxide in the sour gas feed is 8.51 to 10.15, the temperature of the amine is 38.03 to 43.96 °C, and the amine circulation rate is 788.39 to 1122.35 m3/h. The presented work can be considered as a guideline for increasing the recovery efficiency of CO2 for both new and existing sweetening units.

影响脱硫装置酸性气体回收效率的参数监测、建模和优化
胺法是目前用于去除二氧化碳(CO2)和硫化氢(H2S)酸性气体的先进技术。甲基二乙醇胺(MDEA)是一种众所周知的叔胺,用于选择性地从天然气中去除二氧化碳。有许多参数会影响从天然气中分离这些酸性气体的效率。本文对某现有脱硫装置含酸气进料和MDEA溶液的不同操作参数对CO2回收效率的影响进行了研究、建模和优化。这些操作参数是酸气进料温度和压力、进料气中二氧化碳的体积比(%)、胺入口温度和胺循环速率。实际数据从一个工业二氧化碳脱硫装置收集了一年多的时间。利用这些数据研究了所研究的操作参数对脱硫装置CO2回收率的影响。所有研究的操作参数都对脱气的回收效率有影响。Design-Expert软件版本13采用响应面方法对考虑的操作参数与CO2采收率之间的关系进行建模。此外,Design Expert数值优化已被用于最大限度地提高二氧化碳回收效率。结果表明,酸气进料温度为34.71 ~ 45.56℃,酸气进料压力为8.32 ~ 10.04 bar,二氧化碳体积比为8.51 ~ 10.15,胺料温度为38.03 ~ 43.96℃,胺料循环速率为788.39 ~ 1122.35 m3/h。本文的工作可作为提高现有和新建脱硫装置CO2回收率的指导方针。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Egyptian Journal of Petroleum
Egyptian Journal of Petroleum Earth and Planetary Sciences-Geochemistry and Petrology
CiteScore
7.70
自引率
0.00%
发文量
29
审稿时长
84 days
期刊介绍: Egyptian Journal of Petroleum is addressed to the fields of crude oil, natural gas, energy and related subjects. Its objective is to serve as a forum for research and development covering the following areas: • Sedimentation and petroleum exploration. • Production. • Analysis and testing. • Chemistry and technology of petroleum and natural gas. • Refining and processing. • Catalysis. • Applications and petrochemicals. It also publishes original research papers and reviews in areas relating to synthetic fuels and lubricants - pollution - corrosion - alternate sources of energy - gasification, liquefaction and geology of coal - tar sands and oil shale - biomass as a source of renewable energy. To meet with these requirements the Egyptian Journal of Petroleum welcomes manuscripts and review papers reporting on the state-of-the-art in the aforementioned topics. The Egyptian Journal of Petroleum is also willing to publish the proceedings of petroleum and energy related conferences in a single volume form.
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