The importance of ground temperature to a liquid carbon dioxide pipeline

Abstract Considerable research and development has been conducted into vary techniques to capture carbon dioxide (CO 2 ), including its safe and economical transportation to the storage sites. The CO 2 will normally be compressed to the supercritical phase where it demonstrates properties of both liquid and the gas. An alternative for transportation involves the operation solely in the liquid phase. Transporting supercritical CO 2 will demand a larger pipe size and consumes more compressor power because its fluid density is lower than the density of liquid CO 2 . A significant amount of thermal insulation is also required to maintain the phase and contributes additional cost. This paper firstly model and explore the basic difference between transporting supercritical and liquid CO 2 , then proposes transporting liquid CO 2 with the complete utilization of heat exchange between the ground and CO 2 fluid. The pipeline will inevitably face heat exchange between the fluid inside and the surrounding environment due to temperature difference and elevation. In order to avoid phase change, it is necessary to take into account factors such as ambient/soil temperature, soil type, thermal conductivity of pipe and elevation of terrain for ensuring a safe, reliable and cost effective transportation. The models developed in this paper aim to contribute to existing knowledge by highlighting the importance of these factors and laying the foundation for future work when the ambient temperature and elevation changes. A commercially available simulator Aspen HYSYS ® V7.2 in steady state mode, the Peng Robinson Equation of State was used for modelling.

[1]  Kris Piessens,et al.  Pipeline design for a least-cost router application for CO2 transport in the CO2 sequestration cycle , 2008 .

[2]  Sanghyuk Lee,et al.  Evaluation of CO2 liquefaction processes for ship-based carbon capture and storage (CCS) in terms of life cycle cost (LCC) considering availability , 2015 .

[3]  Peder Aursand,et al.  Pipeline transport of CO2 mixtures: Models for transient simulation , 2013 .

[4]  Meihong Wang,et al.  Simulation-based techno-economic evaluation for optimal design of CO 2 transport pipeline network , 2014 .

[5]  Zaoxiao Zhang,et al.  Optimization of pipeline transport for CO2 sequestration , 2006 .

[6]  Sean T. McCoy,et al.  The Economics of CO2 Transport by Pipeline and Storage in Saline Aquifers and Oil Reservoirs , 2008 .

[7]  Eric Williams,et al.  Potential economies of scale in CO2 transport through use of a trunk pipeline , 2010 .

[8]  Jiuping Xu,et al.  Greenhouse Gas Control , 2014 .

[9]  Dianne E. Wiley,et al.  Steady-state design of CO2 pipeline networks for minimal cost per tonne of CO2 avoided , 2012 .

[10]  Andrea Ramírez,et al.  Economic Optimization of CO2 Pipeline Configurations , 2013 .

[11]  Masahiko Ozaki,et al.  Cargo Conditions of CO2 in Shuttle Transport by Ship , 2013 .

[12]  Peder Aursand,et al.  Heat Transfer Characteristics of a Pipeline for CO2 Transport with Water as Surrounding Substance , 2013 .

[13]  A. Aspelund,et al.  Ship Transport of CO2: Technical Solutions and Analysis of Costs, Energy Utilization, Exergy Efficiency and CO2 Emissions , 2006 .

[14]  Li Zheng,et al.  Economic evaluation of CO2 pipeline transport in China , 2012 .

[15]  Edward S. Rubin,et al.  An engineering-economic model of pipeline transport of CO2 with application to carbon capture and storage , 2008 .

[16]  John E. Oakey,et al.  Design overview of high pressure dense phase CO2 pipeline transport in flow mode. , 2013 .