id	keyword
ap-6922	gas
ap-6922	biomass
ap-6922	process
ap-6922	energy
ap-6922	wood
ap-6922	temperature
ap-6922	yield
ap-6922	particle
ap-6922	wood biomass
ap-6922	time
ap-6922	gasifier
ap-6922	size
ap-6922	conversion
ap-6922	residence
ap-6922	optimization