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)
Biomass - Nonfood plants such as sawgrass
Petroleum coke - Byproduct of oil refining
2Catalyst - Something that helps a chemical reaction, but is not itself changed
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.
4Natural gas
is primarily composed of methane (CH4).
6Commercially useful byproducts are captured.
7Captured, sequestered or used for oil recovery
Gas cooling
Gas separation

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

David Butler, Javier Zarracina and Monica Ulmanu/Globe Staff

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