To mitigate global warming and fossil fuel shortages a novel oxy-fuel combustion power plant integrated with a power to gas system is proposed. A net-zero emission MATIANT cycle with inherent CO₂ capture ability is selected as the power cycle also providing the CO₂ and power demand of the power to gas system, which comprises a proton exchange membrane electrolyzer for hydrogen production and a Sabatier reactor for methanation. A techno-economic investigation, a multi-objective optimization, and a sensitivity analysis are carried out. A comprehensive economic method that covers all economic aspects is utilized, and a Sabatier reactor model which considers the possibility of the presence of solid carbon is employed to ensure the practicality of the investigations. It is shown that, when the multi-objective optimization maximizes the net power produced by the system with the lowest possible payback period, 95,700 kW of net power production with a 4.0 year payback period are obtainable. For the objectives of maximum LHV of synthetic natural gas and minimum payback period, a value of LHV of 31,200 kJ/kg with a 3.9 year payback period is attained. Finally, when the objectives are maximizing the produced power while keeping the LHV as high as possible, the net power production and LHV values are 96,200 kW and 31,300 kJ/kg, respectively. The sensitivity analysis indicates that the net power generated by the system and payback period are more sensitive to combustion temperature and high pressure turbine outlet pressure, while the sensitivity of LHV to methanation pressure ratio is high.

为了缓解全球变暖和化石燃料短缺，提出了一种与电力到燃气系统相结合的新型富氧燃烧发电厂。_{选择具有固有 CO 2}捕获能力的净零排放 MATIANT 循环作为动力循环，同时提供 CO ₂电力制气系统的电力需求，该系统包括用于制氢的质子交换膜电解槽和用于甲烷化的 Sabatier 反应器。进行了技术经济调查、多目标优化和敏感性分析。采用涵盖所有经济方面的综合经济方法，并采用考虑固体碳存在可能性的Sabatier反应器模型来确保调查的实用性。结果表明，当多目标优化以尽可能短的投资回收期最大化系统产生的净发电量时，可获得 95,700 kW 的净发电量，投资回收期为 4.0 年。对于合成天然气的最大 LHV 和最短投资回收期的目标，LHV 值为 31,200 kJ/kg 和 3。达到9年投资回收期。最后，当目标是最大化产生的功率同时保持 LHV 尽可能高时，净发电量和 LHV 值分别为 96,200 kW 和 31,300 kJ/kg。敏感性分析表明，系统产生的净功率和投资回收期对燃烧温度和高压汽轮机出口压力更为敏感，而LHV对甲烷化压力比的敏感性较高。