Abstract This work presents a profitability analysis of a novel route to produce biomethane and synthetic natural gas through Power-to-Gas technology. Differently to traditional Power-to-Gas processes, the process configuration herein proposed allows to produce biomethane even if a source of hydrogen is not available. The novelties of this work are both the new process configuration and the comparison among results for several plant sizes (100, 250, 500, and 1000 m3/h) under two representative EU scenarios (Spain and Germany). The main finding of this work is that no profitable results can be obtained at the present natural gas prices, evidencing the need of incentives. Largest plant could reach profitability under reasonable subsidies (12–15 €/MWh). The forecasted cost reduction for H2 production and CO2 methanation are also analysed. The results show that subsidies are needed even in the most optimistic scenario. A corollary of this study is the current technological great challenge to develop low carbon routes which push forward the transition towards sustainable societies.

中文翻译：

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协同沼气升级和电转气的新型配置的盈利能力分析

摘要 这项工作提出了一种通过电转气技术生产生物甲烷和合成天然气的新途径的盈利能力分析。与传统的电转气工艺不同，本文提出的工艺配置即使在氢源不可用的情况下也允许生产生物甲烷。这项工作的新颖之处在于新的工艺配置以及两种代表性欧盟情景（西班牙和德国）下几种工厂规模（100、250、500 和 1000 立方米/小时）的结果之间的比较。这项工作的主要发现是在目前的天然气价格下无法获得有利可图的结果，证明需要激励措施。最大的工厂可以在合理的补贴下实现盈利（12-15 欧元/兆瓦时）。还分析了 H2 生产和 CO2 甲烷化的预测成本降低。结果表明，即使在最乐观的情况下也需要补贴。这项研究的一个推论是当前开发低碳路线的技术巨大挑战，推动向可持续社会的过渡。