id	keyword
cet-1477	hydrogen
cet-1477	glycerol
cet-1477	production
cet-1477	reforming
cet-1477	hydrogen production
cet-1477	steam
cet-1477	process
cet-1477	et al
cet-1477	energy
cet-1477	temperature
cet-1477	biodiesel
cet-1477	reaction