On August 30, China’s largest photovoltaic power generation hydrogen project was completed and put into operation in Kuqa, Xinjiang. This hydrogen, which is produced without carbon emissions during the production process, will completely replace the current natural gas hydrogen production used in the refinery processing of Sinopec Tahe Refining and Chemical Company. According to estimates, after all replacement, carbon dioxide emissions can be reduced by 485,000 tons per year in the future, which marks a new breakthrough in the scale of carbon reduction in China’s industrial field.

Tahe Refining and Chemical Company, as the most western refining enterprise in China, provides about 70% of the gasoline and diesel supply in southern Xinjiang. However, the hydrogen currently used in the refining process has a large amount of carbon dioxide emissions during production. Therefore, the use of photovoltaic power generation, electrolytic water production of hydrogen instead of the existing natural gas hydrogen production, for enterprises to reduce carbon emissions will play a crucial role.

This is the flow chart of the 10,000 ton green hydrogen refining project in Kuqa, Xinjiang. You can see that the clean electricity generated after photovoltaic power generation is transported to the electrolytic water hydrogen production device, and the hydrogen with zero carbon emissions is produced, stored in this huge circular container, and finally transported to the refining plant for production through pipelines.

The chemical industry is one of the key industries to achieve carbon neutrality in China, and the carbon emissions of the chemical industry account for 20% of the total industrial emissions and 13% of the total carbon dioxide emissions in the country. China announced the “Green low-carbon advanced technology Demonstration project Implementation Plan” proposed that by 2030, through the green low-carbon advanced technology demonstration project to lead, advanced and applicable green low-carbon technology research and development, demonstration, promotion model is basically mature, related support policies, business models, regulatory mechanisms are more sound, green low-carbon technology and industrial international competitive advantage is further strengthened. Provide strong support for achieving carbon neutrality.

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Light changes the road to clean chemical raw materials

Hydrogen energy is the chemical energy released by the chemical reaction of hydrogen and oxygen. It is a kind of secondary clean energy with high combustion calorific value. Xinjiang is rich in light resources, and the annual sunshine time is 2550 hours to 3500 hours, which has the natural advantage of developing photovoltaic power generation. How does China’s largest photovoltaic power generation direct hydrogen production project transform solar energy into clean raw materials needed by refining and chemical enterprises?

The Kuqa Green hydrogen demonstration project, which covers an area of more than 9,700 acres, has installed more than 500,000 photovoltaic panels. When the sun shines on the surface of the photovoltaic panel, the free electrons generated by the excitation form a directional movement under the action of the internal electric field, thus forming a current.

Through professional radiation calculation software, the optimal inclination of photovoltaic modules is calculated to ensure that the solar radiation received throughout the year is maximized. The selection of double glass panels increases the utilization rate of sunlight, and the annual power generation is nearly 600 million degrees, and the average power generation is 1.59 million KWH per day.

After the solar energy is converted into electricity, it is sent to the green hydrogen plant through 23.7 kilometers of transmission lines. In the 52 electrolytic cells of the hydrogen production workshop, green electricity is transmitted from afar to electrolyze the configured lye into hydrogen and oxygen. After the hydrogen is purified, it is sent to 10 huge spherical storage tanks.

Kuqa project uses China’s independent research and development of green hydrogen production intelligent decision-making and scheduling system, to achieve “load with the source”, to achieve “intelligent production”, major equipment and core materials to achieve all domestic.

China’s largest photovoltaic power generation green hydrogen project can produce 20,000 tons of green hydrogen per year, which is transported to Tahe refining through pipelines to replace the natural gas used in oil refining processing to produce hydrogen, which can reduce carbon dioxide emissions by 485,000 tons per year.