Due to the high partial pressure of CO_2 at Integrated Gasification Combined Cycle (IGCC) facilities, the use of physical solvents for CO_2 capture offers the potential for enhanced process operation and superior techno-economic performance compared to chemical solvents. However, currently available physical solvents typically suffer from limitations such as some combination of high vapor pressure, high viscosity, hydrophilicity, and/or low CO_2/H_2 selectivity. Due to these limitations, such solvents are typically operated at temperatures below room temperature, and hence can't be regenerated thermally using waste or low-grade heat at IGCC power plants. Ongoing work at the NETL has aimed at addressing these issues through the selective design of novel solvents. Here, we present both lab-scale experimental results and molecular-scale numerical simulations for a number of solvents under development at NETL that are hydrophobic, have low vapor pressure, low viscosity, and high CO_2/H_2 selectivity. We also will discuss future plans to test the most promising of these physical solvents at the pilot plant scale.
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机译：由于整体气化联合循环（IGCC）设施中CO_2的高分压，与化学溶剂相比，使用物理溶剂进行CO_2捕集可提供增强的工艺操作和卓越的技术经济性能的潜力。然而，当前可用的物理溶剂通常遭受诸如高蒸气压，高粘度，亲水性和/或低CO 2 / H 2选择性的某种组合的局限。由于这些限制，此类溶剂通常在低于室温的温度下运行，因此在IGCC电厂中无法利用废料或低级热量进行热再生。 NETL正在进行的工作旨在通过选择性设计新型溶剂来解决这些问题。在这里，我们展示了在NETL上开发的许多疏水，低蒸气压，低粘度和高CO_2 / H_2选择性的溶剂的实验室规模的实验结果和分子规模的数值模拟。我们还将讨论在试验工厂规模上测试这些物理溶剂中最有前途的未来计划。
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