Chinese Journal of Chemical Engineering ›› 2020, Vol. 28 ›› Issue (9): 2285-2293.doi: 10.1016/j.cjche.2020.03.013

• Separation Science and Engineering • Previous Articles     Next Articles

A computational simulation study for techno-economic comparison of conventional and stripping gas methods for natural gas dehydration

Muhammad Salman1, Liangliang Zhang1, Jianfeng Chen1,2   

  1. 1 Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, China;
    2 StateKey Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2019-11-06 Revised:2020-02-29 Online:2020-09-28 Published:2020-10-21
  • Contact: Liangliang Zhang
  • Supported by:
    This work was financially supported by the National Research and Development Program of China (2017YFC0210900) and the National Natural Science Foundation of China (21978011).

Abstract: In the present work, the conventional natural gas dehydration method (CDM) and stripping gas method (SGM) are technically and economically analyzed, utilizing Aspen HYSYS and Aspen Process Economic Analyzer (APEA), respectively. To optimize the CDM and SGM, the sensitivities of the water content of dry gas, reboiler duty and raw material loss are analyzed against solvent rate and stripping gas rate. The optimized processes are set to achieve a targeted value of water content in dry gas and analyzed at optimized point. The analysis shows that SGM gives 46% lower TEG feed rate, 42% lower reboiler duty and 99.97% pure regenerated TEG. Moreover, economic analysis reveals that SGM has 38% lower annual operating cost compared to CDM. According to results, from both technical and economic point of view, SGM is more feasible for natural gas dehydration compared to CDM.

Key words: Natural gas dehydration, Technical analysis, Parametric optimization, Economic study, Aspen HYSYS