Recently, there has been a renewed focus in the gasification research community on the development of small-scale modular gasifiers that can take advantage of local solid feedstocks, and modular-scale synthesis reactors, which can generate local fuels, chemicals, and fertilizers. To fully realize the benefits of modular-scale systems, however, it is crucial for the cost of the required CO₂ capture to remain low, even at reduced flow rates compared with large-scale IGCC-CCS power plants. In this work, the CO₂ capture process in seven pre-combustion power plant with capacities ranging from 54 to 543 MW was modeled using Aspen Plus v8.8. Four physical solvents (PEGPDMS-1, PEGPDMS-3, [bmim][Tf₂N], and [emim][Tf₂N]) were used to capture CO₂ from a typical sulfur-free fuel gas streams in a countercurrent packed-bed absorber. The experimental solubilities of the fuel gas components in the solvents were modeled using the PC-SAFT Equation-of-State. For each power plant capacity, the absorber flooding was checked for all solvents under the operating conditions used. The simulation results showed that increasing power plant capacity from 54 to 543 MW increased the operating expenditure (OPEX) from 2.6 to 30 MM$/year and the capital expenditure (CAPEX) from 10 to 58 MM$. On the other hand, increasing power plant capacity decreased the OPEX and CAPEX expressed in $/ton CO₂ captured, reducing the levelized cost of the CO₂ capture (LCOC) of the process from 12.50 to 7.58 $/ton CO₂ captured, which was attributed to the increased tonnage of the CO₂ removed

最近，气化研究界重新关注开发可利用当地固体原料的小型模块化气化炉，以及可生产当地燃料、化学品和肥料的模块化合成反应器。然而，为了充分发挥模块化系统的优势，与大型 IGCC-CCS 发电厂相比，即使在流速降低的情况下，所需的 CO ₂捕集成本也必须保持较低。在这项工作中，使用 Aspen Plus v8.8 对容量从 54 到 543 MW 的七个预燃发电厂中的 CO ₂捕获过程进行了建模。四种物理溶剂（PEGPDMS-1、PEGPDMS-3、[bmim][Tf ₂ N] 和 [emim][Tf ₂N]) 用于在逆流填充床吸收器中从典型的无硫燃料气流中捕获 CO ₂。使用 PC-SAFT 状态方程模拟燃料气体组分在溶剂中的实验溶解度。对于每个发电厂容量，在使用的操作条件下检查吸收器溢流中的所有溶剂。模拟结果表明，将发电厂容量从 54 MW 增加到 543 MW，运营支出 (OPEX) 从 2.6 MM$/年增加到 30 MM$/年，资本支出 (CAPEX) 从 10 MM$ 增加到 58 MM$。在另一方面，增加发电厂容量降低OPEX和CAPEX表示在$ /吨CO ₂捕获，降低了CO的平准化成本₂过程的捕获 (LCOC) 从 12.50 美元/吨 CO ₂捕获到 7.58 美元，这归因于去除的 CO ₂吨位增加