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The last PSA unit’s off-gas buffer tank for the super-large pressure swing adsorption hydrogen production plant at Shaanxi Coal Group Yulin Chemical was successfully hoisted into place. Author/Source: Gas Separation; Date: 2020-08-19; Clicks: 246. Recently, the last PSA unit’s off-gas buffer tank for the world’s largest coal-based hydrogen production PSA plant – the 480,000 Nm3/h super-large pressure swing adsorption hydrogen production plant operated by Shaanxi Coal Group Yulin Chemical – was successfully hoisted into place, under the overall supervision of EP from Southwest Chemical Engineering Research and Design Institute Co., Ltd. This marks the successful completion of the installation of the PSA units for the syngas purification system in this project. It is reported that the lifting of these PSA units took 24 days, with a total of 48 units being lifted. The total weight of these units was 1,607.80 tons; the heaviest individual unit weighed 59.12 tons and stood 34.5 meters tall. The successful completion of the lifting work for the PSA unit equipment has laid a solid foundation for the subsequent installation of the steel structure and process pipelines. The 1.8 million tons per year ethylene glycol production project of Yulin Chemical Company, belonging to Shaanxi Coal Group, is part of the group’s demonstration project for the utilization of coal in order to produce new chemical materials. Hydrogen is the feed gas for the synthesis of ethylene glycol, and PSA hydrogen production is an important step in the entire process. The PSA hydrogen production unit associated with this project has a total raw gas processing capacity of 570,000 Nm3/h, with a total hydrogen production capacity of 480,000 Nm3/h. Once completed, it will be the largest coal-to-hydrogen PSA plant in the world to date. It represents another major breakthrough in China’s PSA hydrogen production technology, following the 280,000 Nm3/h ultra-large PSA hydrogen production project at Shenhua Ordos in 2008. In June 2019, Southwest Chemical Research and Design Institute Co., Ltd. and Shaanxi Coal Group Yulin Chemical Company signed a supply agreement for a super-large pressure swing adsorption hydrogen production unit with a capacity of 480,000 Nm3/h, to be used in connection with an ethylene glycol production plant with an annual capacity of 1.8 million tons ； According to the project schedule, the design work for this device was completed on June 5 this year ； On July 11 this year, the first lift of the first unit in the 480,000 Nm3/h ultra-large pressure swing adsorption hydrogen production plant – the downstream gas buffer tank (110621-V-101B) – was successfully completed.