The use of biogas as feedstock for hydrogen production was widely proposed in the literature in the last years as a strategy to reduce anthropogenic carbon emissions. However, its lower heating value compared to natural gas hampers the revamping of existing reforming plants. The use of composite carbon molecular sieve membranes for biogas upgrading (CO₂ removal from biogas) was investigated experimentally in this work. In particular, ideal perm-selectivities and permeabilities above the Robeson plot for CO₂/CH₄ mixtures have been obtained. These membranes show better performances compared to polymeric membranes, which are nowadays commercialized for CO₂ separation in natural gas streams. Compared to polymeric membranes, carbon membranes do not show deactivation by plasticization when exposed to CO₂, and thus can find industrial application. This work was extended with a techno-economic analysis where carbon membranes are installed in a steam methane reforming plant. Results have been first validated with data from literature and show that the use of biogas increases the costs of hydrogen production to a value of 0.25 €/Nm³ compared to the benchmark technology (0.21 €/Nm³). On the other hand, the use of biogas leads to a decrease in carbon emissions up to 95%, thus the use of biogas for hydrogen production is foreseen as a very interesting alternative to conventional technologies in view of the reduction in the carbon footprint in the novel technologies that are to be installed in the near future.

近年来，在文献中广泛提出使用沼气作为制氢原料，以此作为减少人为碳排放的策略。但是，与天然气相比，其较低的热值阻碍了对现有重整装置的改造。在这项工作中，实验研究了使用复合碳分子筛膜进行沼气提纯（从沼气中去除CO ₂）。特别地，已经获得了高于Robeson图的CO ₂ / CH ₄混合物的理想渗透选择性和渗透率。与目前已商业化用于CO _2的聚合物膜相比，这些膜表现出更好的性能。天然气流中的分离。与聚合物膜相比，碳膜在暴露于CO ₂时不会因增塑而失活，因此可以用于工业领域。通过技术经济分析扩展了这项工作，在蒸汽甲烷重整工厂中安装了碳膜。首先已使用文献数据验证了结果，结果表明，与基准技术（0.21€/ Nm ^3）相比，使用沼气将制氢成本增加到0.25€/ Nm ³的值。）。另一方面，使用沼气可减少多达95％的碳排放，因此，考虑到减少沼气中的碳足迹，可以预见将沼气用于制氢是传统技术的一种非常有趣的替代方法。将在不久的将来安装的新颖技术。