"Take 60,000 standard cubic meters of tail gas per hour pressure swing adsorption device as an example, if the original technology and adsorbent products are used, the hydrogen recovery rate is about 84%. And the device after the new technology is adopted, the final hydrogen recovery rate will reach 90.4%." On May 29, the relevant person in charge of the Southwest Chemical Research and Design Institute made a rough calculation. Based on the conversion of natural gas to hydrogen, the Quanzhou Petrochemical Phase II refining and chemical project using newly upgraded pressure swing adsorption units will reduce 17,000 per year. Tons of carbon dioxide emissions.
According to reports, the two large-scale PSA devices supporting the Quanzhou Petrochemical Phase II project use Southwest Chemical's PSA device technology, including 223,600 standard cubic meters per hour of reformed gas hydrogenation PSA device, and 6.5 per hour. Ten thousand standard cubic meters of tail gas hydrogen extraction pressure swing adsorption device. On December 20, 2020, the two sets of devices successfully obtained qualified hydrogen products, and they continued to operate stably and safely. Many technical indicators such as the hydrogen recovery rate of the two sets of devices and the operation stability of the devices were superior to foreign technologies.
At present, the desorbed gas from reforming PSA units in most of the domestic petrochemical companies is directly burned. According to the nearly 30 ten-million-ton-level refining projects that have been built in my country, there are more than 800 million standard cubic meters of hydrogen each year. If it is burned in vain, if the pressure swing adsorption device technology of Southwest Chemical can be used for hydrogen recovery, it will produce more than 700 million yuan of direct economic benefits every year, and it will reduce about 500,000 tons of carbon dioxide emissions per year by converting natural gas to hydrogen."This technology can effectively increase the hydrogen recovery rate, reduce the consumption of raw gas, and reduce energy consumption and carbon dioxide emissions. It strongly supports the refining and modern coal chemical industries to improve quality and efficiency, save energy and reduce emissions, and promote the conversion and application of green technologies, which will help my country to achieve the goal of carbon peak and carbon neutrality." said the relevant person in charge of Southwest Chemical Research and Design Institute.