Thermodynamic analysis of a semi-lean solution process for energy saving via rectisol wash technology

Sheng Yang, Lu Zhang, Nan Xie, Zhaohui Gu and Zhiqiang Liu

Energy, 2021, vol. 226, issue C

Abstract: Currently, it is of great significance to develop energy-saving technologies. Rectisol wash technology is becoming more and more popular in the industrial field due to its excellent performance. In order to reduce the energy consumption, a semi-lean solution process based on the Rectisol wash technology is proposed in this paper. The Cubic-Plus-Association (CPA) and Predictive Soave–Redlich–Kwong (PSRK) property methods are selected for the simulations in Aspen Plus. Two scenarios are proposed for the energy and exergy analysis. Results show that 50% SP3-reflux ratio is the optimal point in both scenarios from the energy view, and the optimal SP3-reflux ratios for scenario 1 and scenario 2 are 40% and 43% from the exergy view, respectively. In addition, the analysis results of related parameters in both scenarios show that increasing the SP1-spitting ratio or decreasing the SP2-spitting ratio has a positive effect on CO2 production; the H2S concentration in CO2 product first increases and then decreases while either ratio increases. The stripping N2 flowrate has a significant impact on the H2S concentration in Claus gas. This paper may guide for further study of the semi-lean solution process and provide a better understanding for Rectisol technology.

Keywords: Energy-saving technologies; Rectisol wash; Semi-lean solution process; Energy analysis; Exergy analysis (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:226:y:2021:i:c:s0360544221006514

DOI: 10.1016/j.energy.2021.120402

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