Related by context. Frequent words. (Click for all words.) 71 butanol 66 cellulosic ethanol 64 cellulosic 62 bio ethanol 61 biofuel 60 biodiesel 60 Fischer Tropsch 59 cellulosic biomass 59 Cellulosic ethanol 59 bioethanol 58 biorefinery 57 biomass 57 biofuels 57 feedstocks 57 cellulosic biofuels 57 corn stover 56 bio diesel 56 ethanol 55 hydrogen 54 Coskata 54 bioplastic 54 bioplastics 54 feedstock 53 biorefineries 53 syngas 53 renewable fuels 53 Lignol 53 corn ethanol 52 biomethane 52 biobased 52 polyols 52 anaerobic digestion 51 jatropha 51 Gasification 51 bio fuels 51 camelina 51 gasifier 51 LS9 51 alternative fuels 50 gasification 50 Amyris 50 Iogen 50 Range Fuels 50 switchgrass 50 Metabolix 50 sweet sorghum 50 cellulose 50 E# ethanol 50 hydrocarbon fuels 50 bioenergy 49 Biofuels 49 cleaner burning 49 biogas 49 Biofuel 49 pyrolysis 49 Rentech 49 Genencor 48 Gevo 48 biomass gasification 48 coal gasification 48 Hydrogen 48 Syntroleum 48 biodegradable plastics 48 synthetic fuels 47 methanol 47 wood pellets 47 Enerkem 47 hydrogen powered 47 renewable 47 Feedstock 47 Biodiesel 47 Biomass 47 Solazyme 47 Ethanol 46 biomass fuels 46 woody biomass 46 hydrogenation 46 formic acid 46 miscanthus 46 Verenium 46 Codexis 46 crop residues 46 Burcon 46 SOFC 46 emulsifiers 46 Alternative Fuels 45 Jatropha 45 safflower 45 Protonex 45 biobased products 45 environmentally benign 45 thorium 45 cleaner fuels 45 biopolymers 45 electric powertrain 45 bioproducts 45 algal 45 flex fuel 45 microalgae 45 proton exchange 45 internal combustion engines