Solar hydrogen production technology
Hydrogen is found mainly in compounds such as water, natural gas, and petroleum. Currently, about 95 percent of hydrogen comes from the petrochemical industry. There are many ways to prepare industrial hydrogen. At present, hydrogen separation by natural gas conversion into hydrogen or by by-product of petrochemical and other industrial activities is cost-effective.
In the short term, hydrogen preparation is mainly made by electrolysis of water, natural gas, methanol, coal and other fuels.
1. Pyrolysis of natural gas, petroleum and methanol to produce hydrogen is the most important method to produce hydrogen nowadays. Currently, most hydrogen in the United States is produced through large-scale conversion of natural gas, which is currently a low-cost and environmentally friendly way to produce hydrogen.
2. Hydrogen can be produced and separated as a by-product in the production of synthetic ammonia, synthetic methanol, petroleum refining and other industrial processes.
3. Hydroelectrolysis is one of the most widely used and mature methods. But hydroelectrolysis hydrogen production energy consumption is still high, generally per cubic meter hydrogen electricity consumption is about 4.5-5 degrees, therefore, industrial hydrogen production is generally not in this way.
In the medium term, hydrogen production technology is mainly based on renewable resources such as biomass. Biomass is rich in resources, is an important renewable energy, biomass can be gasified and microorganisms for hydrogen production, is still relatively test conversion technology.
In the long term, solar-based zero-emission hydrogen production technology, which currently has a low conversion rate, will be possible, but Japanese manufacturers also have solar refueling stations as a temporary and complementary form of hydrogen refueling.