Repurposing the world’s massive natural gas network to run on hydrogen could be facilitated by two new membrane technologies, according to Spanish start-up H2Site. The company last month received $13 million in investment from headline names including Breakthrough Energy Ventures, Engie, and Equinor. The funding aims to accelerate the development of its advanced membrane reactor technology, which can facilitate the transport of hydrogen using larger molecules as well as the separation of high purity hydrogen from gas blends. “While much focus is given to hydrogen generation cost reduction, less attention is given to reduction of hydrogen transport cost. Transporting hydrogen is a complex task, it being a small molecule that is difficult to contain. The current compression, storage, decompression, and…