Influence of CO2 Residual of Regenerated Amine on the Performance of Natural Gas Sweetening Processes Using Alkanolamine Solutions

详细信息    查看全文

• 作者：Abolghasem Kazemi ; Ali Kazemi Joujili ; Arjomand Mehrabani-Zeinabad ; Zahra Hajian ; Reza Salehi
• 刊名：Energy & Fuels
• 出版年：2016
• 出版时间：May 19, 2016
• 年：2016
• 卷：30
• 期：5
• 页码：4263-4273
• 全文大小：815K
• 年卷期：0
• ISSN：1520-5029

文摘

In this research, three suitable alkanolamine solutions are selected for sweetening a natural gas with high H₂S content and low CO₂/H₂S ratio. For each process, six different CO₂ fractions in the regenerated solution are selected. On the basis of each CO₂ fraction in the regenerated solution, the three processes are designed and simulated using the Aspen HYSYS process simulator to rich pipeline specifications (i.e., H₂S content lower than 4 ppm and CO₂ content lower than 2 mol %) for the sweet gas. The results of simulation are then economically evaluated using Aspen Economic Evaluation software. The results of simulation and economic evaluation indicate that the diglycolamine (DGA) process is more economical compared to monoethanolamine (MEA) and mixed methyldiethanolamine (MDEA) + MEA processes. Also, it is concluded that there are several advantages in operating the alkanolamine sweetening processes at higher CO₂ fractions of the regenerated amine. On the basis of the results of this study, lower total capital costs, lower annual operating costs, and lower energy requirements for regeneration of the solution are obtainable by operating the alkanolamine sweetening processes at higher fractions of CO₂ in the regenerated solution.