Abstract:

As one of the important technologies to control greenhouse gas emissions, Carbon Capture and Storage technology has attracted more and more attention. Compared with traditional production systems, carbon dioxide emission sources and sequestration sinks in Carbon Capture and Storage systems are often far away from each other. Transportation by pipeline is currently the most economical way to transport carbon dioxide over long distances on a large scale. In this paper, the mathematical model of the pipeline system for carbon capture was established. For the single-period problem, in order to minimize the total project cost of the pipeline system, the optimal pipe network structures of the pipeline system with and without intermediate nodes were obtained under different carbon capture and storage requirements, and the influence of variation of the carbon emissions on the pipeline system was analyzed as well. For the multi-period problem, considering in a long period of project planning, under the two scenarios of maximum total carbon capture and storage requirement and minimum total project cost of the pipeline system, the impacts of the carbon emissions of sources, injection rates and storage capacities of sinks on the optimal pipe network structures were explored.

Key words: CO₂ capture, process systems, optimization, optimal design

摘要：

作为控制温室气体排放的重要技术之一，碳捕集与封存技术吸引了越来越多的关注。相比于传统生产系统，碳捕集与封存系统中的二氧化碳排放源与封存阱往往相距较远，妥善合理地规划两者之间二氧化碳的运输方式是确保系统高效运转的重要前提。而管道运输正是目前长距离、大规模输送二氧化碳最经济的方法。本文首先建立碳捕集中管路系统的数学模型；然后针对单周期问题，为使管路系统的项目总成本最小，分别得到不同碳捕集封存量要求下，无中间节点和有中间节点管路系统的最佳管网结构，并分析碳排放量变化对管路系统的影响；最后针对多周期问题，考虑在一个较长的项目规划期内，管路系统的总捕集封存量最大和项目总成本最小两种情景下，分别探究排放源的碳排放量、封存阱的封存容量和注入速率对有中间节点管路系统的管网结构、项目总成本以及源阱利用情况的影响。

关键词: 二氧化碳捕集, 过程系统, 优化, 优化设计