B3 4.6 Biofuels 5.0 / 5 based on 1 rating ? BiologyGCSEAQA Created by: Maisy GeddesCreated on: 08-05-13 20:31 name two types of biofuels ethanol-based fuels and biogas 1 of 10 how can ethanol based fuels be produced? by fermentation 2 of 10 how is ethanol produced? microorganisms respire anaerobically, using sugars from crops as the energy source 3 of 10 how is glucose produced? from maize starch by the action of a carbohydrase 4 of 10 how are the glucose and sugar cane juices used to produce ethanol fermentation by yeast 5 of 10 how is ethanol extracted distillation 6 of 10 what can the ethanol be used for? fuel in motor vehicles 7 of 10 what is a good effect of using ethanol as fuel replacement of fossil fuels in the future. more carbon friendly. 8 of 10 why is ethanol described as carbon neutral? because only the carbon dioxide used for photosynthesis by the crops is returned to the atmosphere when the ethanol is burned 9 of 10 name the processes of burning producing ethanol from starch digestion of starch to sugar by carbohydrase, fermentation (anaerobic resiration) by yeast and distillation 10 of 10
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