Zero carbon hydrogen energy

Green hydrogen is hydrogen obtained by splitting water from renewable energy sources such as solar and wind energy, and when it is burned, it produces only water, achieving zero carbon dioxide emissions from the source, so it has earned the excellent title of "zero-carbon hydrogen".
Although hydrogen energy is a clean and sustainable new energy source that does not emit carbon dioxide in the process of releasing energy, the current process of producing hydrogen energy is not 100% "zero-carbon". For example, the production of gray hydrogen and blue hydrogen, the other two brothers of green hydrogen, is divided into three categories: gray hydrogen, blue hydrogen, and green hydrogen, according to the source of production and the emissions in the production process.
Grey hydrogen is produced by the combustion of fossil fuels such as oil, natural gas, coal, etc., and although the manufacturing process is low-cost, gray hydrogen is the least popular among the "three brothers" due to the large amount of carbon dioxide emitted from the whole process.
Blue hydrogen is an "upgraded" version of grey hydrogen, made from fossil fuels such as coal or natural gas. While natural gas is also a fossil fuel and produces greenhouse gases when producing blue hydrogen, advanced technologies such as carbon capture, storage and utilization can capture greenhouse gases and ultimately enable low-emission production with reduced environmental impact. Grey hydrogen is used as a fuel for transportation, which actually emits more than direct diesel and gasoline. Compared with grey hydrogen obtained from industrial raw materials, green hydrogen is more pure and has fewer impurities, making it more suitable for fuel cell vehicles and promoting the clean transformation of the transportation sector.
In the chemical industry, hydrogen is often used as a feedstock for the production of ammonia methanol and other chemicals. The emergence of green hydrogen not only contributes to the deep decarbonization of the ammonia production process, but also replaces natural gas and coal for the production of green methanol, reducing carbon emissions in the production of chemicals.
In addition, asphalt can also solve the problem of excess renewable energy generation, and reuse curtailment of wind, solar and water, thereby increasing the utilization rate of renewable energy.
In 2022, the proton exchange membrane water electrolysis hydrogen production system of the Dachen Island Hydrogen Energy Comprehensive Utilization Demonstration Project in Zhejiang Province successfully achieved hydrogen production. Tourism and aquaculture are the island's two pillar industries, and the "green hydrogen ™ integrated energy system can supply electricity and heat for homestays, hotels, villas, etc." The oxygen produced in the hydrogen production process can be provided to yellow croaker farmers, giving full play to the value of hydrogen production by-products and providing impetus for the development of the local aquaculture industry. Green hydrogen is so good, isn't its appearance fee very "expensive"? The amount of electricity required to produce hydrogen by electrolysis is huge, and it takes about 50 kilowatt-hours of electricity to produce one kilogram of hydrogen, which is prohibitively expensive. However, with the further maturity of wind power, tidal power, solar power generation and other technologies, the production cost of green electricity has been reduced, which indirectly reduces the production cost of green hydrogen.
Green hydrogen is no longer "unattainable", and the production of hydrogen through electrolysis of water through photovoltaic power generation not only achieves no carbon emissions in the production process, but also achieves zero carbon emissions in the use process, achieving truly double the clean. It is believed that with the further maturity of future technologies, "green hydrogen" will become one of the important and major new energy sources in the future, and contribute more to the realization of the dual carbon goals.