Design of Adsorption Pretreatment Unit of Natural Gas Feed for LNG

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Sheikh Alivand, Masoud | 2017

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 49680 (06)
University: Sharif University of Technology
Department: Chemical and Petroleum Engineering
Advisor(s): Farhadi, Fatholah
Abstract:
In the present study, simultaneous adsorption of water, mercaptans, carbon dioxide and heavy hydrocarbons on three layers bed, namely Activated Alumina, 4A and 13X Molecular Sieve, on PTSA process is designed and simulated for LNG production. The level of water and mercaptan should be decreased to less than 0.1 ppmv at the bottom of zeolite 4A and 3 ppmv at the bottom of zeolite 13X layer respectively. The main purpose of this study is to investigate the dynamic simulation of multi-component adsorption on a multi-layer bed and to predict the effect of different operational variables on adsorption performance. Multi-layer bed decreases the investment cost and operational challenges in comparison with consecutive adsorption process. Between different isotherm models, extended Langmuir model is chosen which can predict the multi-component adsorption. Despite many conventional investigations, non-isothermal model is used and the vessel properties is considered in all calculation steps
Keywords:
Adsorption ; Dehydration ; Design ; Simulation ; Demercaptanization ; Multilayer Adsorption

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