id	keyword
cet-15636	spk
cet-15636	carbon
cet-15636	process
cet-15636	fuel
cet-15636	corn
cet-15636	production
cet-15636	stover
cet-15636	cost
cet-15636	equipment
cet-15636	syngas
cet-15636	co2
cet-15636	bar