Bio-energy with carbon capture and storage (BECCS) is widely recognised as an important carbon dioxide removal technology. Nevertheless, BECCS has mostly failed to move beyond small-scale demonstration units. One main factor is the energy penalty incurred on power plants. In previous studies, this penalty has been determined to be 37.2–48.6% for the amine capture technology. The aim of this study is to quantify the energy penalty for adding the hot potassium carbonate (HPC) capture technology to a biomass-fired combined heat and power (CHP) plant, connected to a district heating system. In this context, the energy driving the capture process is partially recovered as useful district heating. Therefore, a modified energy penalty is proposed, with the inclusion of recovered heat. This inclusion is especially meaningful if the heat has a substantial monetary value. The BECCS system is examined using thermodynamic analysis, coupled with modelling of the capture process in Aspen Plus™. Model validation is performed with data from a BECCS test facility. The results of this study show that the modified energy penalty is in the range of -3% to 7%. These findings could potentially increase the attractiveness of BECCS as a climate abatement option in a district heating CHP setting.

具有碳捕获和储存的生物能源（BECCS）被广泛认为是一种重要的二氧化碳去除技术。尽管如此，BECCS 大多未能超越小规模示范单位。一个主要因素是发电厂的能源损失。在之前的研究中，胺捕获技术的这种惩罚被确定为 37.2-48.6%。本研究的目的是量化将热碳酸钾 (HPC) 捕获技术添加到连接到区域供热系统的生物质热电联产 (CHP) 发电厂的能量损失。在这种情况下，驱动捕获过程的能量被部分回收为有用的区域供热。因此，提出了一种改进的能量惩罚，包括回收的热量。如果热量具有可观的货币价值，则这种包含特别有意义。BECCS 系统使用热力学分析进行检查，并结合 Aspen Plus™ 中的捕获过程建模。使用来自 BECCS 测试设施的数据执行模型验证。这项研究的结果表明，修改后的能量损失在 -3% 到 7% 的范围内。这些发现可能会增加 BECCS 作为区域供热 CHP 环境中气候减排选项的吸引力。