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Massachusetts firm in $1.25b deal in China

Start-up to build alternative energy project for partner

A Cambridge company will produce synthetic natural gas in China, using a process that captures nearly all the emissions.

1carbon-rich feedstocks (C)
Coal
Biomass - Nonfood plants such as sawgrass
Petroleum coke - Byproduct of oil refining
1
2Catalyst - Something that helps a chemical reaction, but is not itself changed
2
3Pressurized steam (H2O)
Steam mixes with the carbon and distributes the catalyst, creating a fluid in which C and H2O react and change to methane and carbon dioxide.
3
Cyclone
4Natural gas
is primarily composed of methane (CH4).
4
6Commercially useful byproducts are captured.
7Captured, sequestered or used for oil recovery
Gas cooling
Gas separation
CH4
7CO2
5Sulfur
6Ammonia

SOURCES: GreatPoint Energy; chemical dictionary; Union of Concerned Scientists

David Butler, Javier Zarracina and Monica Ulmanu/Globe Staff

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