(businessweek) -- North America’s shale boom is prompting the biggest expansion of natural gas-fed petrochemical plants in 15 years, helping Exxon Mobil Corp.beat Mitsubishi Chemical Holdings Corp. with raw materials that are half the price of the oil product used in Asia.
Hydraulic fracturing of shale rock formations, known as fracking, is giving U.S. chemical makers an edge in making ethylene, a building block in everything from plastics to antifreeze. Record gas production has driven down the cost of ethane, a component that’s converted to ethylene, by 60 % this year and prompted Japan to shut units running on oil-based naphtha that’s up 2 %.
Exxon Mobil and Westlake Chemical Corp. are among companies building ethane-fed plants to benefit from shale output that cut gas prices by about 75 percent since 2008. Mitsubishi plans to shut an ethylene unit, partly blaming the “emergence of shale gas” in North America, while Mitsui Chemicals Inc. also anticipates cutbacks. Closures may spread to South Korea and Taiwan, according to Credit Suisse Group AG.
Gas liquids, mostly ethane, supply about 85 %of feedstock for U.S. ethylene makers. Almost all plants in Northeast Asia use naphtha.