This paper presents a novel multigeneration framework based on fossil fuels, which offers several advantages such as high thermodynamic efficiency, low electricity and liquid carbon dioxide (CO₂) production costs, and significantly reduced pollutant emissions. The simulation was carried out using the Aspen HYSYS software. The thermodynamic analysis revealed that the process achieves a total exergy efficiency of 86% and an energy efficiency of 31.36%. The integrated system yields various products, including 597.6 kmol/h of liquid CO2, 3484 kmol/h of desalinated water, 17600 kmol/h of natural gas for the trunk line, and 41742.1 kW of power. The analyses further demonstrated that the total exergy destruction in the process amounts to 118071 kW, with contributions from the HPGU, NHPGU, MNPGU, and CSLU units of 30.1%, 22.23%, 30.36%, and 17.29%, respectively. Regarding environmental impact, the analysis revealed that the indirect emissions from the process are negligible. When the CO₂ recovery rate exceeds 99%, the direct emission amounts to 153.72 kg/h, and the pollution intensity of the proposed scheme is 3.68 g_CO2/kWh_el, which is lower than that of other technologies. Additionally, the economic analysis indicated that the production costs of CO₂ and electricity in the proposed process are 0.075 $/kg_CO2 and 0.048 $/kWh, respectively.

本文提出了一种基于化石燃料的新型多联发电框架，它具有热力学效率高、电力低和液态二氧化碳 (CO ₂)生产成本，污染物排放量大幅减少。使用 Aspen HYSYS 软件进行模拟。热力学分析表明，该过程实现了 86% 的总火用效率和 31.36% 的能源效率。综合系统生产多种产品，包括597.6 kmol/h的液态CO2、3484 kmol/h的淡化水、17600 kmol/h的干线天然气和41742.1 kW的功率。分析进一步表明，该过程中的总火用损失达 118071 kW，HPGU、NHPGU、MNPGU 和 CSLU 装置的贡献分别为 30.1%、22.23%、30.36% 和 17.29%。关于环境影响，分析显示该过程的间接排放可以忽略不计。当CO ₂回收率超过99%，直接排放量为153.72 kg/h，本方案污染强度为3.68 g _CO2 /kWh _el，低于其他技术。此外，经济分析表明，在拟议的过程中， CO ₂和电力的生产成本分别为 0.075 美元/kg _CO2和 0.048 美元/kWh。