Author(s): XUE Yongyong, LIU Yang, LIU Linlin, TIAN Shuo, DU Jian, Institute of Process Systems Engineering, School of Chemical Engineering, Dalian University of Technology, Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology
Pages: 1298-1302
Year: 2016 Issue:  5
Journal: Chemical Industry and Engineering Progress
Keyword:  natural gas purification process; DEA method; TEG method; optimization; AHP;
Abstract: In order to avoid severe corrosion of vessel or freezing in cryogenic exchangers,feed gas from natural gas well heads containing various contaminants and acid gases cannot be sent to the liquefaction unit directly,and must pass through purification units to remove undesirable components such as CO₂,H₂ S and H₂ O. In this paper,DEA and TEG methods are adopted to remove such components,and these two methods are coupled into a natural gas purification process to reach the purification target. As the project handbook only gives the approximate range of process parameters,an optimal process is not available. This paper first applies software HYSYS 8.4 to simulate the natural gas purification process based on relevant data. Then nine combined cases are listed according to the recommended range of process parameters,and a system assessment method,Analytic Hierarchy Process（AHP）,is introduced. Finally,multi-objective comprehensive assessment is made using AHP in Matlab to select the optimal process parameters. This approach can provide reference for optimization of natural gas purification process and other processes.