Related by context. Frequent words. (Click for all words.) 55 miscible 55 liquify 54 exhaustible 54 environmentally beneficial 53 gasifying 52 sludges 52 saline aquifers 52 reinjection 51 hydrocarbon liquids 50 oxidising 50 Coal gasification 50 CO -2 50 Reverse osmosis 50 Tar sands 50 Supercritical 50 potent greenhouse gas 50 renewable feedstocks 50 oxidization 50 elemental sulfur 50 desalting 50 nonrenewable resource 50 diatomite 50 oxidizing agent 49 toxic solvents 49 biogenic 49 gasified 49 lignocellulosic biomass 49 sequester carbon dioxide 49 gaseous fuels 49 Oil Recovery EOR 49 sequestration CCS 49 CO2 sequestration 49 IGCC plants 49 nitrogenous 48 desulfurization 48 phosphine 48 desulphurisation 48 alkylation 48 liquids GTL 48 liquefying 48 exothermic 48 Fischer Tropsch process 48 adipic acid 48 NH3 48 algal biomass 48 Carbon sequestration 48 Kuan Yin Taiwan 48 Coal seam 48 fluorocarbons 48 extraction 48 pollution abatement 48 methane ethane 48 evaporation ponds 48 fraccing 47 nitrification 47 Glycol 47 emit CO2 47 ammonia urea 47 hydro carbons 47 kerogen 47 isocyanate 47 frac sand 47 feedstock 47 Hydrogen sulfide 47 carbonic acid 47 isomerization 47 esterification 47 monoxide 47 Anaerobic digestion 47 oxidise 47 depletable 47 biodiesels 47 fracturing fluids 47 alkanes 47 isoprene 47 biocrude 47 externality 46 biodegraded 46 economically unsound 46 mineral ores 46 feedstuff 46 debottlenecking 46 heap leach processing 46 breeder reactors 46 acidifying 46 microbial fermentation 46 Varvarinskoye 46 benzene toluene 46 glycols 46 byproducts 46 hydrotreating 46 BTEX 46 methane CH4 46 vaporization 46 sorption 46 denitrification 46 Ethane 46 pentane 46 H#O# 46 RLNG 46 sulfite