What is methane? How is it produced?
Methane is a gas. It consists of one atom of carbon and four atoms of hydrogen. It has a very high energy density.
Methane that occurs naturally is being produced either inorganically or organically with the help of living cells. Methane can be produced using catalysts either in a temperature of a couple of hundred C° without using living cells or in a temperature of 50–60 C° using methane microbes. The latter is called biomethanation.
Qvidja Kraft’s microbe reactor produces biomethane out of hydrogen and carbon dioxide which are being produced out of water and carbon monoxide in a wood gas plant.
What is done with produced methane?
Methane has a high energy density and it is used as fuel, to produce heat or generate electricity. Biomethane produced in Qvidja Kraft can be used directly as traffic fuel.
Using biogas as traffic fuel instead of liquid fuel increases carbon dioxide emissions remarkably. Biomethane is an excellent traffic fuel, because it does not produce any particles which would be injurious for lungs.
How does Qvidja Kraft’s bioreactor increase gain of methane?
40 percent of biogas consists of carbon dioxide. It has to be removed before biogas is ready to be used as fuel. With Qvidja Kraft’s bioreactor there is no need to release that carbon dioxide to the atmosphere, becase it can be used as raw material for methane. In that way instead of only the earlier 60 percent also the 40 percent can be used, and the gain increases from the original even over 60 percent.
What is new with Qvidja Kraft’s biomethanation method?
Reactor structure, that can be used both to produce methane – even from syngas – and to store renewable energy is completely new.
How can methane be used to store renewable energy?
Surplus solar and wind energy can be transformed into and stored as methane. When there is cheap electricity available, it can be used to eletrolyte hydrogen from water. That hydrogen is then transformed into methane in the reactor. Methane has the longest storage time and largest storage capacity out of all the renewable energy sources.
For whom the reactor suits?
Qvidja Kraft’s biomethanation method has great scalability and it suits both small farm-scale as well as large industrial-scale solutions.
The reactor does not replace existing biogas technology but helps to enhance it. It can be installed to biogas plant where it increases the gain of methane. Microbes need hydrogen and carbon dioxide to produce methane and those are available for example as industrial byproducts. Qvidja Kraft has combined microbe technology with wood gasification, and the source of hydrogen can also be any kind of gasifier that produces carbon monoxide. First one reactor transforms it to hydrogen, and another reactor uses it to produce methane.