Comparison of MTO process technologies for coal-to-olefins projects already in operation in China

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This post was last edited by jack_okey on 2012-8-16 09:06. To date, China has operationalized three coal-to-olefins (CTO) pilot projects, with a total designed capacity of 1.56 million tons per year. Among them, the 500,000 tons per year methanol-to-propylene (MTP) project owned by Shenhua Ningxia Coal Industry Group began trial operation in October 2010 ； The 600,000 tons per year MTO project under Shenhua Baotou Coal Chemical Co., Ltd. came online in August 2010 ； The 460,000 tons per year MTP project under Datang International Power Generation began trial operation in June 2011. The production of these three sets of devices has become stable. Additionally, the 200,000 tons per year CTO plant owned by Sinopec Zhongyuan Petrochemical Branch was put into operation in 2011. To provide a comprehensive understanding of the three coal-to-olefins projects, the process technologies used in each of them are compared as follows: Comparison Table of the Three Coal-to-Olefins Projects. Comparison Items: Shenhua Ningxia Coal, Shenhua Baotou, Datang Dolun. 1. Investment Entities: Shenhua Group, Shenhua Group, Datang International. 2. Plant Scale: 2.1 Methanol (10,000 tons/year): 167, 180, 168; 2.2 Olefins (10,000 tons/year): 52,300 + 30,460. 3. Production Processes: 3.1 Air Separation: 3.1.1 Configuration: 2×95,000, 4×60,000, 3×58,000; 3.1.2 Suppliers: Air Liquide, Hangyang. 3.2 Gasification: 3.2.1 Gas Process: Siemens GSP, GE coal slurry gasification, SHELL pulverized coal gasification; 3.2.1 Number of Gasifiers per Unit: 5 (4 in operation, 1 standby), 7 (5 in operation, 2 standby), 3 (no standby gasifiers); 3.2.3 Daily coal input per gasifier: 2,000 tons, 1,500 tons, 2,800 tons. 3.3 Purification: Lurgi low-temperature methanol washing, Linde low-temperature methanol washing, Lurgi low-temperature methanol washing. 3.4 Methanol Synthesis: Lurgi process, British DAVY process, Lurgi process. 3.5 Olefin Production Processes: Lurgi MTP, Dalian Institute of Chemical Physics DMTO, Lurgi MTP. 3.6 Polyolefin Production Processes: ABB polypropylene, American Dow polypropylene, American UNIVATION polyethylene, American Dow. (Source: China Coal Chemical Industry Network)