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A CO_2-PENS model of methods and costs for treatment of water extracted during geologic carbon sequestration

机译:地质固碳过程中处理水的方法和成本的CO_2-PENS模型

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Extraction of water during subsurface carbon sequestration may be useful for the control of CO_2 placement, reducing pressure risks, and mitigating environmental risks. Desalination of this water may be possible if costs are kept low, in order to minimize the quantity that must be reinjected or otherwise disposed. Added value may be recovered in the form of treated water that can be reused by carbon capture, sequestration, and other industrial processes. Total dissolved solids will range from 10,000 mg/L up to over 100,000 mg/L, and temperatures may range up to 120 ℃, once the water is brought to the surface. We have developed a system-level, mesoscale analysis module for the CO_2-Predicting engineered natural system model to analyze the feasibility of treatment, the costs of treatment, the value of energy recovery, and the costs of concentrate disposal. Costs are derived from a database of reported literature values. The model allows the user to select the most economic options for treatment, to compare costs, and to understand the trade-off of risks and costs. Results of preliminary modeling indicate that while reverse osmosis is feasible within certain temperature and salinity ranges, nanofiltration and thermal methods may be more cost-effective or otherwise feasible.
机译:在地下碳固存过程中提取水可能有助于控制CO_2的放置,降低压力风险并减轻环境风险。如果将成本保持在较低水平,则可以对这种水进行脱盐处理,以最大程度地减少必须重新注入或处置的水量。增值可以以经处理的水的形式回收,可以通过碳捕获,封存和其他工业过程再利用。一旦将水带到地表,总溶解固体含量将在10,000 mg / L至超过100,000 mg / L的范围内,温度最高可达120℃。我们已经为预测CO_2的工程自然系统模型开发了系统级的中尺度分析模块,以分析​​处理的可行性,处理的成本,能量回收的价值以及精矿的处置成本。成本来自报告文献价值的数据库。该模型允许用户选择最经济的治疗方案,比较成本,并了解风险和成本之间的权衡。初步建模的结果表明,尽管在一定的温度和盐度范围内反渗透是可行的,但纳米过滤和热法可能更具成本效益或其他方式可行。

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