3/30/2023 0 Comments Blue hydrogenThe colour simply denotes how it’s made, and this kind is generated from natural gas (which mostly consists of methane and ethane), the fossil fuel which powers most gas boilers and stoves and which scientists have identified as an important source of carbon emissions that governments need to eliminate.īrown hydrogen uses lignite coal (also known as brown coal, generated over millions of years by compressed peat deposits) or oil. The CO₂ is often emitted to the atmosphere where it contributes to global heating, and the hydrogen is extracted and used in everything from car engines to boilers, releasing water vapour. Eventually, you get carbon dioxide (CO₂) and hydrogen. This involves combining fossil fuels with steam, and heating them to around 800☌. So what is hydrogen fuel – and what makes it blue?Īccording to the International Energy Agency, 96% of hydrogen produced worldwide is made using fossil fuels – coal, oil and natural gas – in a process known as reforming. In the US, about half of all homes use natural gas for space and water heating. But according to a new report by Cornell and Stanford University researchers in the US, it may be no better for the climate – and potentially a fair bit worse – than continuing to use fossil natural gas, which currently keeps 85% of UK homes warm. Skip Menuīlue hydrogen is often touted as a low-carbon fuel for generating electricity and storing energy, powering cars, trucks and trains and heating buildings. Loading Spinner An icon of a loading spinner. Success Tick Timeout An icon of a greyed out success tick. Information An icon of an information logo. Speech Bubble Icon A icon displaying a speech bubble WhatsApp An icon of the WhatsApp logo. Video Camera An icon of a video camera shape. Previous An icon of an arrow pointing to the left. Notice An explanation mark centred inside a circle. Next An icon of an arrow pointing to the right. Hamburger Menu Icon An icon used to represent a collapsed menu. Search Icon A magnifying glass icon that is used to represent the function of searching. Magnifying Glass An icon of a magnifying glass. Comments An icon of a speech bubble, denoting user comments. Close Icon An icon used to represent where to interact to collapse or dismiss a component Comment An icon of a speech bubble. Breaking An icon of an exclamation mark on a circular background. Pause Icon A two-lined pause icon for stopping interactions. ![]() Is Not Public An icon of a human eye and eyelashes with a diagonal line through it. Is Public An icon of a human eye and eyelashes. Telephone An icon of a traditional telephone receiver. Profile An icon that resembles human head and shoulders. Linked In An icon of the Linked In "in" mark. Facebook An icon of the Facebook "f" mark. Caret An icon of a block arrow pointing to the right. Cancel An icon of a circle with a diagonal line across. However, neither current blue nor green hydrogen production pathways render fully “net-zero” hydrogen without additional carbon dioxide removal.Calendar An icon of a desk calendar. Under such conditions, blue hydrogen is compatible with low-carbon economies and features climate change impacts in line with green hydrogen from electrolysis supplied with renewable electricity. State-of-the-art reforming with high CO2 capture rates combined with natural gas supply featuring low methane emissions does indeed allow for substantial reduction of greenhouse gas emissions compared to both conventional natural gas reforming and direct combustion of natural gas. ![]() We show that such impacts may indeed vary over large ranges and depend on only a few key parameters: the methane emission rate of the natural gas supply chain, the CO2 removal rate at the hydrogen production plant, and the global warming metric applied. Our analysis sheds light on the relevant issues and provides a balanced perspective on the impacts on climate change associated with blue hydrogen. However, recent research raises questions about the effective climate impacts of blue hydrogen from a life cycle perspective. If substantial amounts of CO2 from natural gas reforming are captured and permanently stored, such hydrogen could be a low-carbon energy carrier. Natural gas based hydrogen production with carbon capture and storage is referred to as blue hydrogen.
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