Composition of DMG Syngas / Hydrogen for AFC Fuel Cells3 Jan 2020 23:08
Away back in July 2017 in an interview on Proactive KA stated that the composition of the syngas produced from the DMG unit was typically 45% CO, 45% hydrogen, and the remaining 10% consisting of methane and a little bit of CO2. Since then I believe the ratio of hydrogen was increased to somewhere over 50% but I don't know what the latest figures are.
Anyway, at that stage the hydrogen is clearly not pure enough to sell as a separate product for use in EVs or to generate electricity using fuel cells, so in the absence of any further processing the entire syngas would be used to fuel a generator to produce electricity.
In order to produce hydrogen that is purified to an acceptable level to be used in EVs or by AFC fuel cells, Pressure Swing Adsorption (PSA) equipment would have to be employed. The cost of this equipment is in the same ball-park as the DMG unit itself, so clearly sale of the purified hydrogen would have to produce a much higher level of revenue to justify the additional cost.
I understand that the AFC fuel cells do not require the same level of hydrogen purity as do EVs but I suspect that there would be little or not difference in the cost of producing either level of purity. So having gone to the additional expense of purifying the hydrogen, the question that will need to be considered by the owner/operator of the DMG unit is how to maximise their revenue: a) sell the hydrogen for use by EVs, or b) use the hydrogen with AFC's fuel cells to produce and sell electricity.
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