Optimization of pipeline transport for CO2 sequestration
Optimization of pipeline transport for CO2 sequestration
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DOI：
10.1016/j.enconman.2005.06.001
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发表时间：
2006-04
影响因子：
10.4
通讯作者：
Zao-xiao Zhang;Geoff Wang;P. Massarotto;V. Rudolph
中科院分区：
文献类型：
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作者：
Zao-xiao Zhang;Geoff Wang;P. Massarotto;V. Rudolph
在可预见的未来，燃煤发电将继续为世界提供能源。然而，这种能源使用是导致大气二氧化碳浓度增加的一个重要因素，从而导致全球变暖。在过去的十年中，二氧化碳的捕获和处置受到了越来越多的研发关注，因为该技术有望成为大规模减少二氧化碳排放的最具成本效益的技术。本文从系统优化、能源效率和整体经济性角度讨论了通过管道从捕获场到处置场的二氧化碳运输。从技术上讲，二氧化碳可以以气体、超临界流体或过冷液态的形式通过管道运输。在操作上，大多数用于提高石油采收率的二氧化碳管道将二氧化碳作为超临界流体输送。本文对超临界流体和过冷液体传输进行了检查和比较，包括它们对能源效率和成本的影响。使用商用过程模拟器 ASPEN PLUS 10.1，结果表明，在等温和绝热条件下，过冷液体运输可最大限度地提高能源效率，并最大限度地降低长距离二氧化碳运输的成本。过冷液态CO2的管道运输可以理想地用于寒冷气候地区或通过埋地和保温管道的方式。在非常温暖的气候下，定期制冷将二氧化碳冷却到其临界点 31.1°C 以下可能是经济的。仿真已用于确定到后续升压站的最大安全管道距离，该距离是入口压力、环境温度和地面热通量条件的函数。
Coal fired power generation will continue to provide energy to the world for the foreseeable future. However, this energy use is a significant contributor to increased atmospheric CO2concentration and, hence, global warming. Capture and disposal of CO2has received increased R&D attention in the last decade as the technology promises to be the most cost effective for large scale reductions in CO2emissions. This paper addresses CO2transport via pipeline from capture site to disposal site, in terms of system optimization, energy efficiency and overall economics. Technically, CO2can be transported through pipelines in the form of a gas, a supercritical fluid or in the subcooled liquid state. Operationally, most CO2pipelines used for enhanced oil recovery transport CO2as a supercritical fluid. In this paper, supercritical fluid and subcooled liquid transport are examined and compared, including their impacts on energy efficiency and cost. Using a commercially available process simulator, ASPEN PLUS 10.1, the results show that subcooled liquid transport maximizes the energy efficiency and minimizes the cost of CO2transport over long distances under both isothermal and adiabatic conditions. Pipeline transport of subcooled liquid CO2can be ideally used in areas of cold climate or by burying and insulating the pipeline. In very warm climates, periodic refrigeration to cool the CO2below its critical point of 31.1°C, may prove economical. Simulations have been used to determine the maximum safe pipeline distances to subsequent booster stations as a function of inlet pressure, environmental temperature and ground level heat flux conditions.