design of a plant to produce one tonne of biscuit per day
However, "expensive" is a subjective as opposed to objective term. If one can produce CO 2 for $25 per tonne from flue gas, is that expensive? Yes, if $10 per tonne CO 2 is available from natural reservoirs. No, if one has to pay typical commercial rates of $70 100 per tonne. Industrial ammonia production emits more CO 2 than any