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World’s largest SNG plant goes onstream in China  

By Gerald Ondrey |

Haldor Topsøe A/S (Lyngby, Denmark; www.topsoe.com) says that Qinghua, the largest substitute natural gas (SNG) plant ever built in the world was successfully started in the city of Yining, located in Xinjiang, a region in the northwestern part of China. Topsøe designed the methanation section of this plant, which is owned and operated by the Chinese company Qinghua Group. It is the largest single-train SNG plant in the world representing a total investment of $4.1 billion and a planned output of 1.4 billion Nm3/yr of SNG based on coal gasification. The plant uses Haldor Topsøe catalysts and process technology, namely the company’s TREMP methanation technology, which enables highly cost-effective production of SNG from synthesis gas derived from coal. In the methanation process carbon oxides react with hydrogen to form methane, and the methane rich gas is sold as Substitute Natural Gas. “TREMP is based on Topsøe’s innovative MCR catalyst portfolio, which is characterized by a high and stable activity at a wide range of temperatures. An efficient heat recovery, combined with a low recycle ratio and reduced gas flow leads to significant energy savings, lower equipment cost and overall improved…
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