This study presents a detailed computational simulation of a hybrid hydrogen production system that integrates steam methane reforming (SMR) and hydrogen sulfide (H₂S) electrolysis, coupled with waste heat recovery, at the Afyon Biogas Power Plant (ABP). The plant operates with a capacity of 4000 kW and an exhaust gas temperature of approximately 767 K, converting 55 % of the biogas to energy, constrained by the limitations of both the turbine and biogas plant operations. Despite these constraints, a methane yield of up to 75 % from biomass is achievable. The surplus methane is converted into blue hydrogen via SMR, while H₂S, a byproduct of biogas production, undergoes electrolysis to generate green hydrogen. Additionally, gray hydrogen is separated and stored during the biogas production process. The system achieves a hydrogen production rate of 0.061 kg/s through optimization, comprising 91.4 % blue hydrogen, 8.18 % gray hydrogen, and 0.41 % green hydrogen. The energy and exergy efficiencies of the primary system are calculated to be 26.23 % and 22.99 %, respectively. The integration of waste heat recovery enhances these efficiencies to 76.21 % and 42.96 %. A techno-economic analysis indicates that the cost of electricity is 0.04644 $/kWh, while the average hydrogen production cost is 2.05 $/kg. The total investment cost (TIC) amounts to 21,177,230 $, with an estimated annual revenue of 4,702,000 $, yielding a payback period of 4.405 years. This study demonstrates the efficiency and economic feasibility of hydrogen production from waste products at the biogas plant, underscoring the viability of the proposed investment.

中文翻译：

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评估 Afyon 沼气厂通过脱硫工艺从过量的甲烷和副产品硫化氢中生产多氢


本研究对 Afyon 沼气发电厂 （ABP） 的混合制氢系统进行了详细的计算模拟，该系统集成了蒸汽甲烷重整 （SMR） 和硫化氢 （H₂S） 电解，以及余热回收。该工厂的运行容量为 4000 kW，废气温度约为 767 K，将 55% 的沼气转化为能源，受到涡轮机和沼气厂运行限制的限制。尽管存在这些限制，但生物质的甲烷产量仍可达到 75%。多余的甲烷通过 SMR 转化为蓝色氢气，而沼气生产的副产品 H₂S 则经过电解以产生绿色氢气。此外，在沼气生产过程中，灰色氢气被分离和储存。该系统通过优化实现了 0.061 kg/s 的制氢速率，包括 91.4% 的蓝氢、8.18% 的灰氢和 0.41% 的绿氢。计算出初级系统的能量和用能效率分别为 26.23 % 和 22.99 %。余热回收的集成将这些效率提高到 76.21 % 和 42.96 %。技术经济分析表明，电力成本为 0.04644 美元/千瓦时，而平均制氢成本为 2.05 美元/公斤。总投资成本 （TIC） 为 21,177,230 美元，估计年收入为 4,702,000 美元，投资回收期为 4.405 年。这项研究证明了沼气厂从废液中制氢的效率和经济可行性，强调了拟议投资的可行性。