CO2 Freezing Area Concept for Improved Cryogenic Distillation of Natural Gas

1st International Symposium of Indonesian Chemical Engineering 2018

Adhi, T.P.^1 ; Putra, E.P.^1 ; Haristyawan, R.B.^2

Department of Chemical Engineering, Institut Teknologi, Bandung, Indonesia^1

Upstream Technology Center, PT. Pertamina (Persero), Indonesia^2

关键词: Cryogenic distillations;    Economic aspects;    Membrane process;    Operational problems;    Process economics;    Process simulations;    Steady-state modeling;    Sweetening process;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/543/1/012077/pdf
DOI  :  10.1088/1757-899X/543/1/012077

来源: IOP

【 摘 要 】

Sweetening process for natural gas with high content of sour gas (≥ 40% mol of CO2 & H2S) is difficult to be profitable. A lot of gas fields in Indonesia has high content of sour gas. New improved cryogenic distillation process of natural gas applying the concept of CO2 freezing in the middle of the column is promising. To study the feasibility of this technology, comparison with other two methods (Absorption and Membrane process) in technical and economic aspects were elaborated. Process simulation of improved cryogenic distillation steady-state model was developed using Aspen HYSYS. CAPEX of all methods were estimated using Aspen Process Economic Analyzer. Compared to the other methods, this improved cryogenic distillation process showed tendency to have lower CAPEX and OPEX, but have some uncovered operational problems.