0	0.14887	model data system control time method process based 
1	0.10224	production biomass food using extraction acid yield oil 
2	0.1085	materials surface using chemical catalyst properties water carbon 
3	0.14766	energy process heat production hydrogen gas system cost 
4	0.15811	temperature pressure flow heat model gas experimental liquid 
5	0.13921	environmental energy waste management sustainable sustainability development data 
6	0.09896	safety risk odour analysis process assessment chemical fire 
7	0.09048	concentration water treatment removal wastewater using chemical growth