Think affordable, available, sustainable carbon is the biggest barrier to the growth of biofuels? Or, access to market via blender pumps? In the case of drop-in biofuels, the biggest challenge might be finding enough hydrogen. You might have heard of the Hydrogen Economy, the Hydrogen Miracle, the Hydrogen Car, or that free hydrogen (H2) is … Continue reading The Hydrogen Wall: Looking at the prospects for drop-in biofuels