Hi I would like to ask the community if we can set up a post for a new energy system I have been working on ,I think it works out more efficient and ecologically better , and its large scale thinking for energy systems , and now I need to check through my figures and need the views of IET thinkers for instance on combustion , post combustion chemistry , it unfolds into quite a complex system which I have been working on for 8 years , but enables us to get more energy from wastes and perhaps helps to move to biomaterials. I have an interest as environmental thinker and have designed the system to go through to government funding phases and pretty confident it works well in a number of questions around energy and environmental thinking .
Had a technical enquiry …. why don't high moisture fuels burn as well as dry ones , I think its because the H20 increases the temperature of ignition..... well I guess that's one way of looking at thermo chemistry. H20 plays no part in the energy production in oxidation , and the faster you can get the actual molecules involved in the chemical oxidation reaction , the more heat you produce …. ok so far good ….. so what does actually happen to a 1cm cube of wood introduced to oxygen , well one way is to immerse it in liquid oxygen and ignite it probably with an ignition source at 200oc , because it has oxygen within its structure it could even combust under water. mmmm well if we get the slow mo guys in and burn our 1cm cube in pure oxygen gas , we first see the outer surface start to char as the 200oC temperature moves from the external surface inwards , in so doing the moisture H20 is driven off as a vapour , when the wood ignites temperatures of 800oC occur driving any further moisture and causing the oxygen to react with the carbon to produce heat ,light CO2 and H2O, this why power companies grind coal into dust before combustion as they get a much quicker heat release and much less partial combustion .
so providing the solids are in small particle size if they are pre heated or part pyrolyzed before oxidation , the moisture should be driven out of the main carbonaceous material , and hence high moisture fuels when partially pyrolyzed before oxidation ….. will combust in a way similar to dried fuels …. I rest my case.
Had a technical enquiry …. why don't high moisture fuels burn as well as dry ones , I think its because the H20 increases the temperature of ignition..... well I guess that's one way of looking at thermo chemistry. H20 plays no part in the energy production in oxidation , and the faster you can get the actual molecules involved in the chemical oxidation reaction , the more heat you produce …. ok so far good ….. so what does actually happen to a 1cm cube of wood introduced to oxygen , well one way is to immerse it in liquid oxygen and ignite it probably with an ignition source at 200oc , because it has oxygen within its structure it could even combust under water. mmmm well if we get the slow mo guys in and burn our 1cm cube in pure oxygen gas , we first see the outer surface start to char as the 200oC temperature moves from the external surface inwards , in so doing the moisture H20 is driven off as a vapour , when the wood ignites temperatures of 800oC occur driving any further moisture and causing the oxygen to react with the carbon to produce heat ,light CO2 and H2O, this why power companies grind coal into dust before combustion as they get a much quicker heat release and much less partial combustion .
so providing the solids are in small particle size if they are pre heated or part pyrolyzed before oxidation , the moisture should be driven out of the main carbonaceous material , and hence high moisture fuels when partially pyrolyzed before oxidation ….. will combust in a way similar to dried fuels …. I rest my case.
