Recently, the reporter came to the construction site of Xinjiang Kuqa photovoltaic green hydrogen production project. The whole photovoltaic project covers an area of more than 9500 mu, equivalent to the size of more than 900 football fields. At present, the whole project is under intense construction. The photovoltaic panel beside the reporter can produce 1kg of hydrogen for every 58 degrees of green electricity.
Xinjiang Kuqa green hydrogen demonstration project will all use renewable energy such as photovoltaic and wind power to generate hydrogen. The hydrogen production scale will reach 20000 tons per year, which is also the largest green hydrogen project under construction in the world.
In the process of hydrogen production, green electric energy is transmitted to the hydrogen production workshop to obtain hydrogen through alkaline water electrolysis. All the hydrogen produced will be transmitted to the Tahe refining and chemical company near the project by pipeline for oil refining unit production, replacing the original natural gas hydrogen production. The annual carbon dioxide emission reduction is about 500000 tons.
Cao Jie, deputy general manager of Sinopec Tahe refining and chemical company, said that Xinjiang is particularly rich in photovoltaic resources due to on-site processing and utilization, so it is very suitable to explore new energy schemes for hydrogen here. The cost of hydrogen production from photovoltaic electrolyzed water is about 18 yuan per kilogram.
The reporter learned that, taking Sinopec as an example, the amount of hydrogen that can be replaced by green hydrogen is 2.1 million tons, accounting for about 48% of the total scale of hydrogen consumption. If the current market price of hydrogen is 20 yuan / kg, the market scale will exceed 42 billion yuan.
Ling Yiqun, deputy general manager of Sinopec: we expect that the entire petrochemical industry will be replaced by green hydrogen through green electricity in the future, and the future industrial scale will be at least 100 billion.
The application prospect of green hydrogen in transportation, metallurgy and chemical industry is broad
The reporter has noticed that there are a large number of renewable energy resources in the western region and the eastern coast. Where are the hydrogen application scenarios produced by these clean energy sources?
Experts said that from the perspective of terminal consumption, chemical synthesis and petroleum refining are the main scenarios of hydrogen application at present, and the application in the transportation field is less than 1%, and the future space is broad.
Li Bo, an expert of the national energy science and Technology Resource Center, said that the biggest advantages of hydrogen fuel cells in the field of transportation are high power and long endurance.
In the just released implementation plan for carbon peak in the industrial field, it is proposed to promote the development of the whole chain of hydrogen energy production, storage, transportation and marketing, encourage hydrogen production from renewable energy, implement the action plan for hydrogen metallurgy, and strengthen the research and development of low-carbon clean energy equipment such as hydrogen fuel.
If green hydrogen can be applied on a large scale, the first thing to be solved is the cost. How to reduce the cost of hydrogen production? How much space is there?
The reporter learned that green electricity to green hydrogen and electrolytic water to hydrogen are the most mainstream methods at present, of which the cost of electricity accounts for nearly 70%. In the future, the application of green hydrogen will benefit from the reduction of the cost of new energy generation.
At present, when the cost of wind power and photovoltaic power is below 0.15 yuan / kWh, it is economical to produce hydrogen by electrolyzing water with renewable energy
At present, when the cost of wind power and photovoltaic power is below 0.15 yuan / kWh, it is economical to produce hydrogen by electrolyzing water with renewable energy
Li Bo, an expert of the national energy science and Technology Resource Center: when the cost of wind power and photovoltaic power is below 0.15 yuan / kWh, it is economical to produce hydrogen from renewable energy electrolytic water. At present, the efficiency of the renewable energy electrolytic water hydrogen production technology is 60% - 70%.
The reporter learned that the heat of 1 kg of hydrogen is equivalent to 4 L of gasoline. At present, the cost of green hydrogen production in China is about 20 yuan per kg. With the iteration of new energy power generation and electrolytic water technology, the cost is expected to be significantly reduced. At the same time, the surplus new energy in the western region can be converted into hydrogen and then sent to the central and eastern region through the existing natural gas pipeline.
Dai Jianfeng, deputy chief engineer of electric power planning and Design Institute: green renewable energy will become the most important primary energy in the hydrogen production process. On the other hand, electrolytic water hydrogen production will become the largest load of the power system, accounting for more than 20% of the total social electricity consumption.
