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The 40,000 Nm3/h high-pressure PSA hydrogen production unit developed by Fujian Fuhua Tianchen was successfully commissioned. Author/Source: Gas Separation. Date: April 29, 2021. Clicks: 59. A few days ago, Southwest Chemical Engineering Research and Design Institute Co., Ltd. announced that it had successfully completed the initial commissioning of the 40,000 Nm3/h high-pressure PSA low-temperature methanol washing gas purification hydrogen production unit for Fujian Fuhua Tianchen Gas Co., Ltd., by providing proprietary technology, engineering design, and key equipment. The successful operation of this device demonstrates that high-pressure PSA system technology in China is fully viable and economically reasonable. It further optimizes the coal-to-hydrogen process and meets the requirements of high-pressure gasification processes; the combination of coal gasification technology with high-pressure PSA technology will see wider application in China’s coal-to-hydrogen sector. Southwest Chemical will continue to drive technological progress in China’s PSA industry, promote the adoption of green technologies, and contribute to the achievement of the strategic goals related to carbon peak and carbon neutrality. It is reported that this project is the PSA unit with the highest design pressure ever developed in China, with a design pressure of 6.8 MPaG. The purity of the hydrogen produced is ≥99.9%, and all specifications meet or exceed the requirements stipulated in the contract. The project uses coal as raw material. Taking into account the composition and pressure conditions of the feed gas, as well as the requirements regarding the hydrogen product and yield, it adopts the \"pressure swing adsorption process with two countercurrent tanks\" developed by Southwest Chemical Industry (patent number: ZL200510020305X). This approach effectively improves the flushing efficiency and enhances the adsorption capacity of the PSA unit, thereby meeting the needs of the users. It is stated that due to the extremely high pressure in PSA units, very high requirements are placed on their airtightness. External leakage of valves can pose safety risks, while internal leakage can result in substandard product quality or the unsafe situation of high-pressure gas entering low-pressure pipelines. The programmable valves supplied by Southwest Chemical performed excellently throughout the airtightness testing process, with no leaks occurring at all, thus providing strong support for the smooth commissioning of the facility.