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 partly 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 2%–4%. These findings could potentially increase the attractiveness of BECCS as a climate abatement option in a district heating CHP setting.

具有碳捕获和存储的生物能源（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在大多数情况下仍未能超越小型示范单位。一个主要因素是发电厂的能源损失。在以前的研究中，对于胺捕获技术，这种损失被确定为37.2％–48.6％。这项研究的目的是量化将热碳酸钾（HPC）捕集技术添加到与区域供热系统相连的生物质燃烧热电联产（CHP）厂的能耗损失。在这种情况下，驱动捕获过程的能量部分作为有用的区域供热回收。因此，提出了一种改进的能量损失，其中包括了回收的热量。如果热量具有可观的货币价值，则这种包容尤其有意义。使用热力学分析以及Aspen Plus™中捕获过程的建模来检查BECCS系统。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，修正的能量损失在2％–4％的范围内。这些发现可能会潜在地提高BECCS作为区域供热CHP环境中的气候减排方案的吸引力。