Xebec Adsorption Inc., a Canadian company providing gas purification and filtration solutions, has commenced operation of its first commercial landfill gas to CNG upgrading system in Anshan, Liaoning province in North Eastern China. The high quality product gas — biomethane — will be used to power compressed natural gas (CNG) taxis that operate in the City of Anshan.
The landfill gas upgrading system is based on Xebec’s fast cycle pressure swing adsorption (PSA) technology, assembled and integrated at Xebec’s Shanghai facility according to Chinese code and certification requirements. It is operating within a variable pressure envelope of 90 to 120 psig and dynamic feed flow parameters between 500 and 1300 m3/h. In addition, Xebec is deploying a kinetic adsorption process to continuously remove varying amounts of nitrogen (N2) and oxygen (O2), while maintaining corresponding recovery rates of 83 to 91%, and product gas purity levels of 94 to 98.6% methane (CH4).
“Xebec’s upgrading system performance is excellent, delivering gas quantities and qualities which are higher and purer than we expected. This allows us to sell more high quality gas to our customers, making this investment very attractive for us” said Mr. Luo Yong, Chairman of Beijing Golden Green Environmental Engineering & Technology Co. Ltd., the owner of the project.
“China is committed to significantly reduce greenhouse gas emissions over the coming decades and needs technologies like Xebec’s that can provide tangible reductions in GHG emissions. Upgraded landfill gas used as transportation fuel has the lowest GHG emission profile of any transportation fuel available today, beating out electrical and hydrogen vehicles,” said Dr. Peter Cheng, Xebec Adsorption General Manager in Shanghai.
He continued by stating, “China has the potential to convert massive amounts of biogas and landfill gas into low carbon renewable natural gas which can then be utilized in a number of different applications, allowing China to move exponentially toward an ecologically sustainable society”.
Xebec stated in a press release at the time the project was commenced that Xebec and Golden Green will continue to focus on the 150 to 170 medium sized landfills in China that qualify for upgrading landfill gas to renewable transportation fuel.
Compressed Natural Gas-powered taxis have been operating in Liaoning Province since 2006.
(Source: Xebec Adsorption Inc.)