A debate over the merits of green and blue hydrogen
most complex problems that Britain faces is climate change. The simplest element in the periodic table is increasingly seen as part of the answer. Low-carbon hydrogen can be made either from natural gas, with the carbon that is emitted captured and stored underground , or from water, using an electrolyser powered by renewable energy . Hydrogen can help decarbonise activities that cannot easily be electrified.
The government’s proposed price-support mechanism is also savvy. This is a variant of the “contracts for difference” approach it has used to support offshore wind, which guarantees low-carbon producers a certain price by topping up the market price of hydrogen. In theory, such an approach will allow low-carbon hydrogen to compete with grey hydrogen. As cleaner hydrogen becomes cheaper, support will be withdrawn.
Mr Jackson and other advocates want the government instead to focus on hydrogen from electrolysers, which can be powered by renewable electricity. Electrolysers can be placed next to the point of use, without the need for hydrogen pipelines, and the technology is also a promising candidate for exports. The government ought to start with the technology it wants to end up with, lest it “end up with stranded assets”, says Graham Cooley of ITM Power, a Sheffield-based electrolyser manufacturer.
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