Integration of CO sub(2) cryogenic removal with a natural gas pressurized liquefaction process using gas expansion refrigeration

Space limitation is a great challenge in offshore liquefied natural gas production. A novel natural gas liquefaction process aimed at footprint reduction is first proposed in this study. The novel process uses pressurized liquefaction technology to decrease the size of the heat exchanger, and it ado...

Full description

Saved in:
Bibliographic Details
Published in:Energy (Oxford) 2015-12, Vol.93, p.1-9
Main Authors: Xiong, Xiaojun, Lin, Wensheng, Gu, Anzhong
Format: Article
Language:English
Subjects:
Carbon dioxide
Energy consumption
Footprints
Liquefaction
Natural gas
Offshore
Outsourcing
Precooling
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Space limitation is a great challenge in offshore liquefied natural gas production. A novel natural gas liquefaction process aimed at footprint reduction is first proposed in this study. The novel process uses pressurized liquefaction technology to decrease the size of the heat exchanger, and it adopts CO sub(2) cryogenic removal to eliminate the large CO sub(2) pretreatment facility so as to achieve a small footprint. Since energy consumption is always a big concern for a natural gas liquefaction process, this study performs optimization for the proposed process. Taking the specific power consumption as the objective function, the proposed process is optimized by the sequential search method using HSYSY simulation. In this study, the proposed processes with and without precooling are both studied and the effect of precooling is discussed. Various refrigerants are employed in the proposed processes and their optimal performances are compared and analyzed. Furthermore, natural gas with different CO sub(2) contents is used as feed gas to investigate the effect of CO sub(2) content on energy consumption. In conclusion, the proposed novel process with a small footprint and low energy consumption provides a promising option for offshore liquefied natural gas production.
ISSN:0360-5442
DOI:10.1016/j.energy.2015.09.022